java.lang.Object
- cc.redberry.rings.poly.multivar.AMultivariatePolynomial<Term,Poly>

Type Parameters:

Term - type of monomials

Poly - type of this (self-type)

All Implemented Interfaces:

Stringifiable<Poly>, IPolynomial<Poly>, Serializable, Comparable<Poly>, Iterable<Term>

Direct Known Subclasses:

MultivariatePolynomial, MultivariatePolynomialZp64
```
public abstract class AMultivariatePolynomial<Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>>
extends Object
implements IPolynomial<Poly>, Iterable<Term>
```
Parent class for multivariate polynomials.
Variables:
The number of variables is invariant, which means that binary arithmetic operations on polynomials with different number of variables (see nVariables) are prohibited. Of course all exponents of particular variable may be zero, so e.g.
```
 MultivariatePolynomial.parse("x^2 + 2*x*y + y^3", "x", "y", "z")
 
```
will have nVariables == 3 while "z" is actually absent in the poly.
Particular string names of variables are not stored in the polynomial data structure, instead the variables are treated as consequent integer numbers (0, 1, 2,...), where 0 states for the first variable, 1 for the second etc. Information about variables is accessible by the integer index of the variable. The mapping between the variable index and its string representation should be stored separately outside this class. For example:
```
 // x is the first variable, y is the second
 String[] variables = {"x", "y"};
 MultivariatePolynomial<BigInteger> poly =
                  MultivariatePolynomial.parse("x^2 + 2*x*y + y^3", variables);

 // degree in x
 int xDegree = poly.degree(0);
 assert xDegree == 2;
 // degree in y
 int yDegree = poly.degree(1);
 assert yDegree == 3;

 // will use the specified mapping and print x^2 + 2*x*y + y^3
 System.out.println(poly.toString(variables));

 // will use the default mapping and print a^2 + 2*a*b + b^3
 System.out.println(poly.toString());
 
 
```
Terms storage and ordering:
Terms of multivariate polynomial are stored in a sorted map DegreeVector -> Monomial (see MonomialSet). The order of monomials is defined by the Comparator<DegreeVector> which possible values are MonomialOrder.LEX, MonomialOrder.ALEX, MonomialOrder.GREVLEX and MonomialOrder.GRLEX. All operations on the instances of this will preserve the ordering of this. The leading term of the poly is defined with respect to this ordering.
Since:

1.0

See Also:

IPolynomial, MultivariatePolynomialZp64, MultivariatePolynomial, Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`AMultivariatePolynomial.PolynomialCollector<Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>>`	Collector which collects stream of element to a UnivariatePolynomial

Field Summary

Fields
Modifier and Type	Field	Description
`IMonomialAlgebra<Term>`	`monomialAlgebra`	Monomial algebra
`int`	`nVariables`	The number of variables
`Comparator<DegreeVector>`	`ordering`	The ordering

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`Poly`	`add(Iterable<Term> monomials)`	Adds monomials to this polynomial
`Poly`	`add(Poly oth)`	Adds `oth` to `this`.
`Poly`	`add(Term monomial)`	Adds `monomial` to this polynomial
`Poly`	`add(Term... monomials)`	Adds monomials to this polynomial
`Iterator<Term>`	`ascendingIterator()`
`static <Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>> Poly`	`asMultivariate(IUnivariatePolynomial poly, int nVariables, int variable, Comparator<DegreeVector> ordering)`	Converts univariate polynomial to multivariate.
`static <Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>> Poly`	`asMultivariate(UnivariatePolynomial<Poly> uPoly, int variable)`	Convert univariate polynomial over multivariate polynomials to a normal multivariate poly
`static <Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>> Poly`	`asMultivariate(UnivariatePolynomial<Poly> univariate, int uVariable, boolean join)`
`abstract MultivariatePolynomial<Poly>`	`asOverMultivariate(int... variables)`	Converts this to a multivariate polynomial with coefficients being multivariate polynomials polynomials over `variables` that is polynomial in R[variables][other_variables]
`MultivariatePolynomial<Poly>`	`asOverMultivariateEliminate(int... variables)`	Converts this to a multivariate polynomial with coefficients being multivariate polynomials polynomials over `variables` that is polynomial in R[variables][other_variables]
`abstract MultivariatePolynomial<Poly>`	`asOverMultivariateEliminate(int[] variables, Comparator<DegreeVector> ordering)`	Converts this to a multivariate polynomial with coefficients being multivariate polynomials polynomials over `variables` that is polynomial in R[variables][other_variables]
`MultivariatePolynomial<Poly>`	`asOverPoly(Poly factory)`	Consider coefficients of this as constant polynomials of the same type as a given factory polynomial
`abstract MultivariatePolynomial<? extends IUnivariatePolynomial>`	`asOverUnivariate(int variable)`	Converts this to a multivariate polynomial with coefficients being univariate polynomials over `variable`
`abstract MultivariatePolynomial<? extends IUnivariatePolynomial>`	`asOverUnivariateEliminate(int variable)`	Converts this to a multivariate polynomial with coefficients being univariate polynomials over `variable`, the resulting polynomial have (nVariable - 1) multivariate variables (specified `variable` is eliminated)
`abstract IUnivariatePolynomial`	`asUnivariate()`	Converts this to univariate polynomial or throws exception if conversion is impossible (more than one variable have non zero exponents)
`UnivariatePolynomial<Poly>`	`asUnivariate(int variable)`	Converts this polynomial to a univariate polynomial over specified variable with the multivariate coefficient ring.
`UnivariatePolynomial<Poly>`	`asUnivariateEliminate(int variable)`	Converts this polynomial to a univariate polynomial over specified variable with the multivariate coefficient ring.
`abstract Poly`	`clone()`	Deep copy of this
`Poly`	`coefficientOf(int[] variables, int[] exponents)`	Returns a coefficient before `variables^exponents` as a multivariate polynomial
`Poly`	`coefficientOf(int variable, int exponent)`	Returns a coefficient before `variable^exponent` as a multivariate polynomial
`Collection<Term>`	`collection()`
`Poly`	`composition(int[] variables, Poly[] values)`	Substitutes given polynomial instead of specified variable (that is `this(x_1, ..., value, ..., x_N)`, where value is on the place of specified variable)
`Poly`	`composition(int variable, Poly value)`	Substitutes given polynomial instead of specified variable (that is `this(x_1, ..., value, ..., x_N)`, where value is on the place of specified variable)
`<sPoly extends IUnivariatePolynomial<sPoly>> sPoly`	`composition(Ring<sPoly> uRing, sPoly... values)`	Substitutes given polynomials instead of variables of this (that is `this(values_1, ..., values_N)`)
`Poly`	`composition(List<Poly> values)`	Substitutes given polynomials instead of variables of this (that is `this(values_1, ..., values_N)`)
`Poly`	`composition(Poly... values)`	Substitutes given polynomials instead of variables of this (that is `this(values_1, ..., values_N)`)
`<sPoly extends IUnivariatePolynomial<sPoly>> sPoly`	`composition(sPoly... values)`	Substitutes given polynomials instead of variables of this (that is `this(values_1, ..., values_N)`)
`Poly`	`content(int variable)`	Gives the content of this considered as R[variable][other_variables]
`Poly`	`contentExcept(int variable)`	Gives the content of this considered as R[other_variables][variable]
`abstract IUnivariatePolynomial`	`contentUnivariate(int variable)`	Gives the content of this considered as R[variable][other_variables]
`Poly`	`create(DegreeVector term)`	Creates multivariate polynomial over the same ring as this with the single monomial
`Poly`	`create(Iterable<Term> terms)`	Creates multivariate polynomial over the same ring as this from the list of monomials
`Poly`	`create(Term term)`	Creates multivariate polynomial over the same ring as this with the single monomial
`Poly`	`create(Term... terms)`	Creates multivariate polynomial over the same ring as this from the list of monomials
`abstract Poly`	`createConstantFromTerm(Term term)`	Creates multivariate polynomial over the same ring as this with the single constant element taken from given monomial
`Poly`	`createMonomial(int variable, int degree)`	Creates monomial over the same ring as this of the form `variable ^ degree`
`int`	`degree()`	Returns the total degree of this polynomial, that is the maximal total degree among all terms
`int`	`degree(int variable)`	Returns the degree of this polynomial with respect to specified variable
`int`	`degree(int... variables)`	Gives the degree in specified variables
`int`	`degreeMax()`	Returns the maximal degree of variables in this polynomial
`int[]`	`degrees()`	Returns an array of degrees of all variables, so that is i-th element of the result is the polynomial degree with respect to i-th variable
`int[]`	`degrees(int variable)`	Returns the array of exponents in which `variable` occurs in this polynomial
`protected int[]`	`degreesRef()`	returns reference (content must not be modified)
`int`	`degreeSum()`	Returns the sum of `degrees()`
`Poly[]`	`derivative()`	Gives the derivative vector
`Poly`	`derivative(int variable)`	Gives partial derivative with respect to specified variable (new instance created)
`abstract Poly`	`derivative(int variable, int order)`	Gives partial derivative of specified `order` with respect to specified variable (new instance created)
`Iterator<Term>`	`descendingIterator()`
`Poly`	`divideDegreeVectorOrNull(DegreeVector monomial)`	Divides this polynomial by a `monomial` or returns `null` (causing loss of internal data) if some of the elements can't be exactly divided by the `monomial`.
`abstract Poly`	`divideOrNull(Term monomial)`	Divides this polynomial by a `monomial` or returns `null` (causing loss of internal data) if some of the elements can't be exactly divided by the `monomial`.
`Poly`	`dropCoefficientOf(int[] variables, int[] exponents)`	Returns a coefficient before `variables^exponents` as a multivariate polynomial and drops all such terms from this
`Poly`	`dropSelectVariables(int... variables)`	Makes a copy of this with all variables except specified ones replaced with the units
`Poly`	`dropVariable(int variable)`	Makes a copy of this with the specified variable dropped
`Poly`	`dropVariables(int[] variables)`	Makes a copy of this with the specified variable replaced with the unit
`int`	`ecart()`	Returns degreeSum - lt().totalDegree
`boolean`	`equals(Object o)`
`abstract Poly`	`evaluateAtRandom(int variable, org.apache.commons.math3.random.RandomGenerator rnd)`	Evaluates `poly` at random point
`abstract Poly`	`evaluateAtRandomPreservingSkeleton(int variable, org.apache.commons.math3.random.RandomGenerator rnd)`	Evaluates `poly` at random point chosen in such way that the skeleton of evaluated version is the same as of the original `poly` with respect to all except `variable` variables
`Poly`	`evaluateAtZero(int variable)`	Substitutes `0` for `variable` (new instance created).
`Poly`	`evaluateAtZero(int[] variables)`	Substitutes `0` for all specified `variables` (new instance created).
`Term`	`first()`
`Set<DegreeVector>`	`getSkeleton()`	Returns skeleton of this poly
`Set<DegreeVector>`	`getSkeleton(int... variables)`	Returns skeleton of this poly with respect to specified `variables`
`Set<DegreeVector>`	`getSkeletonDrop(int... variables)`	Returns skeleton of this poly with respect to specified `variables`
`Set<DegreeVector>`	`getSkeletonExcept(int... variables)`	Returns skeleton of this poly with respect to all except specified `variables`
`int`	`hashCode()`
`Poly`	`homogenize(int variable)`	Homogenize poly by adding new (homogenizing) variable
`Poly`	`insertVariable(int variable)`	Makes a copy of this by inserting new variable (the indexes will be shifted)
`Poly`	`insertVariable(int variable, int count)`	Makes a copy of this by inserting new variables (the indexes will be shifted)
`boolean`	`isEffectiveUnivariate()`	Returns whether this poly is effectively univariate (not more than one variable is non-unit)
`boolean`	`isHomogeneous()`	Returns whether all terms have the same total degree
`boolean`	`isLinearExactly()`	Returns whether this polynomial is linear (i.e.
`boolean`	`isLinearOrConstant()`	Returns whether this polynomial is linear (i.e.
`boolean`	`isMonomial()`	Returns `true` if this polynomial has only one monomial term
`boolean`	`isVariable()`	Returns whether this is a plain variable (with no coefficient)
`boolean`	`isZero()`	Returns `true` if this is zero
`boolean`	`isZeroCC()`	Returns true if constant term is zero
`Iterator<Term>`	`iterator()`
`Poly`	`joinNewVariable()`	Returns a copy of this with `nVariables = nVariables + 1`
`Poly`	`joinNewVariables(int n)`	Returns a copy of this with `nVariables = nVariables + m`
`Term`	`last()`
`Poly`	`lc(int variable)`	Returns the leading coefficient of this viewed as R[other_variables][variable]
`abstract Poly`	`lcAsPoly(Comparator<DegreeVector> ordering)`	Returns the leading coefficient with respect to specified ordering as a constant poly
`Term`	`lt()`	Returns the leading term in this polynomial according to ordering
`Term`	`lt(Comparator<DegreeVector> ordering)`	Returns the leading term in this polynomial according to specified ordering
`Poly`	`ltAsPoly()`	Returns the leading term in this polynomial according to ordering
`abstract <E> MultivariatePolynomial<E>`	`mapCoefficientsAsPolys(Ring<E> ring, Function<Poly,E> mapper)`
`Poly`	`mapVariables(int[] mapping)`	Renames old variables to new according to mapping
`abstract Poly`	`monic(Comparator<DegreeVector> ordering)`	Make this poly monic considering leading term with respect to given ordering
`abstract Poly`	`monicWithLC(Comparator<DegreeVector> ordering, Poly oth)`	Sets `this` to its monic part multiplied by the leading coefficient of `other` with respect to given ordering
`Term`	`monomialContent()`	Returns the monomial content of this polynomial
`Term`	`mt()`	Returns the minimal term in this polynomial according to ordering
`int[]`	`multidegree()`	Returns the multidegree of this polynomial i.e.
`abstract Poly`	`multiply(Term monomial)`	Multiplies `this` by the `monomial`
`Poly`	`multiplyByDegreeVector(DegreeVector dv)`	Multiplies `this` by the degree vector
`Poly`	`multiplyByMonomial(int variable, int exponent)`	Multiplies this by variable^exponent
`Poly`	`negate()`	Negates this and returns
`int`	`nUsedVariables()`	Returns the number of really used variables (those which are not units)
`abstract Poly`	`primitivePart(int variable)`	Gives primitive part of this considered as R[variable][other_variables]
`Poly`	`put(Term monomial)`	Puts `monomial` to this polynomial replacing the previous entry if was
`protected void`	`release()`	release caches
`static <T extends AMonomial<T>,P extends AMultivariatePolynomial<T,P>> P`	`renameVariables(P poly, int[] newVariables)`	Rename variables from [0,1,...N] to [newVariables[0], newVariables[1], ..., newVariables[N]] (new instance created)
`static <T extends AMonomial<T>,P extends AMultivariatePolynomial<T,P>> P`	`renameVariables(P poly, int[] newVariables, Comparator<DegreeVector> newOrdering)`	Rename variables from [0,1,...N] to [newVariables[0], newVariables[1], ..., newVariables[N]] (new instance created)
`static <T extends AMonomial<T>> T`	`renameVariables(T e, int[] newVariables)`	Rename variables from [0,1,...N] to [newVariables[0], newVariables[1], ..., newVariables[N]] (new instance created)
`boolean`	`sameSkeletonExceptQ(AMultivariatePolynomial oth, int... variables)`	Tests whether `this` and `oth` have the same skeleton with respect all except specified `variables`
`boolean`	`sameSkeletonQ(AMultivariatePolynomial oth)`	Tests whether `this` and `oth` have the same skeleton
`boolean`	`sameSkeletonQ(AMultivariatePolynomial oth, int... variables)`	Tests whether `this` and `oth` have the same skeleton with respect to specified `variables`
`abstract Poly`	`seriesCoefficient(int variable, int order)`	Gives (unevaluated) coefficient of Taylor series expansion for specified variable that is `derivative(poly, variable, order) / order!`, where the derivative is formal derivative and calculated with arithmetic performed in Z ring (to overcome possible zeros in Zp).
`Poly`	`set(Poly oth)`	Sets the content of this to `oth`
`Poly`	`setAllCoefficientsToUnit()`	Set all coefficients to units
`Poly`	`setLC(int variable, Poly lc)`	Set the leading coefficient of specified variable to a specified value (this is considered as R[other_variables][variable])
`Poly`	`setNVariables(int newNVariables)`	auxiliary method
`Poly`	`setOrdering(Comparator<DegreeVector> newOrdering)`	Makes a copy of this with the new ordering `newOrdering`
`int`	`size()`	Returns the number of terms in this polynomial
`int`	`skeletonHashCode()`
`double`	`sparsity()`	Sparsity level: size / (product of degrees)
`double`	`sparsity2()`	Sparsity level: `size / nDenseTerms` where nDenseTerms is a total number of possible distinct terms with total degree not larger than distinct total degrees presented in this.
`Poly`	`subtract(Poly oth)`	Subtracts `oth` from `this`.
`Poly`	`subtract(Term monomial)`	Subtracts `monomial` from this polynomial
`Poly`	`subtract(Term cf, Poly oth)`	Subtracts `cf * oth` from this polynomial
`Poly`	`subtractLt()`	Removes the leading term from this polynomial
`static <T extends AMonomial<T>,P extends AMultivariatePolynomial<T,P>> P`	`swapVariables(P poly, int i, int j)`	Renames variable `i` to `j` and `j` to `i` (new instance created)
`Term[]`	`toArray()`
`String`	`toString()`
`int`	`totalDegree()`	Returns the total degree, that is sum of `degrees()`
`Poly`	`toZero()`	Sets this to zero
`int`	`univariateVariable()`	Returns -1 if this poly is not effectively univariate or variable in which it is univariate

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Comparable
compareTo

Methods inherited from interface cc.redberry.rings.poly.IPolynomial
add, assertSameCoefficientRingWith, canonical, ccAsPoly, coefficientRingCardinality, coefficientRingCharacteristic, coefficientRingPerfectPowerBase, coefficientRingPerfectPowerExponent, coefficientRingToString, coefficientRingToString, contentAsPoly, copy, createArray, createArray, createArray, createArray, createArray2d, createArray2d, createConstant, createOne, createZero, decrement, divideByLC, increment, isConstant, isMonic, isOne, isOverField, isOverFiniteField, isOverPerfectPower, isOverZ, isUnitCC, lcAsPoly, monic, monicExact, monicWithLC, multiply, multiply, multiply, multiply, multiplyByBigInteger, multiplyByLC, parsePoly, primitivePart, primitivePartSameSign, sameCoefficientRingWith, setCoefficientRingFrom, setCoefficientRingFromOptional, signumOfLC, square, subtract, toPositiveLC, toString

Methods inherited from interface java.lang.Iterable
forEach, spliterator

Methods inherited from interface cc.redberry.rings.io.Stringifiable
toString

- Field Detail
  - nVariables
```
public final int nVariables
```
    The number of variables
  - ordering
```
public final Comparator<DegreeVector> ordering
```
    The ordering
  - monomialAlgebra
```
public final IMonomialAlgebra<Term extends AMonomial<Term>> monomialAlgebra
```
    Monomial algebra
- Method Detail
  - swapVariables
```
public static <T extends AMonomial<T>,P extends AMultivariatePolynomial<T,P>> P swapVariables(P poly,
                                                                                                          int i,
                                                                                                          int j)
```
    Renames variable i to j and j to i (new instance created)
    
    Parameters:
    
    poly - the polynomial
    
    i - the first variable
    
    j - the second variable
    
    Returns:
    
    polynomial with variable i renamed to j and j renamed to i
  - renameVariables
```
public static <T extends AMonomial<T>,P extends AMultivariatePolynomial<T,P>> P renameVariables(P poly,
                                                                                                            int[] newVariables)
```
    Rename variables from [0,1,...N] to [newVariables[0], newVariables[1], ..., newVariables[N]] (new instance created)
    
    Parameters:
    
    poly - the polynomial
    
    newVariables - the new variables
    
    Returns:
    
    renamed polynomial
  - renameVariables
```
public static <T extends AMonomial<T>> T renameVariables(T e,
                                                         int[] newVariables)
```
    Rename variables from [0,1,...N] to [newVariables[0], newVariables[1], ..., newVariables[N]] (new instance created)
    
    Parameters:
    
    e - the term
    
    newVariables - the new variables
    
    Returns:
    
    renamed term
  - renameVariables
```
public static <T extends AMonomial<T>,P extends AMultivariatePolynomial<T,P>> P renameVariables(P poly,
                                                                                                            int[] newVariables,
                                                                                                            Comparator<DegreeVector> newOrdering)
```
    Rename variables from [0,1,...N] to [newVariables[0], newVariables[1], ..., newVariables[N]] (new instance created)
    
    Parameters:
    
    poly - the polynomial
    
    newVariables - the new variables
    
    newOrdering - the new ordering
    
    Returns:
    
    renamed polynomial
  - asMultivariate
```
public static <Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>> Poly asMultivariate(IUnivariatePolynomial poly,
                                                                                                                             int nVariables,
                                                                                                                             int variable,
                                                                                                                             Comparator<DegreeVector> ordering)
```
    Converts univariate polynomial to multivariate. Example:
    //convert (x^2 + 1) in Z[x] to multivariate polynomial (c^2 + 1) in Z[a,b,c] multivarPoly = asMultivariate(univarPoly, 3, 2, MonomialOrder.LEX)
    Type Parameters:
    
    Term - desired terms type
    
    Poly - desired polynomial type
    
    Parameters:
    
    poly - the univariate polynomial
    
    nVariables - the total number of variables in the result
    
    variable - the univariate variable
    
    ordering - the term order
    
    Returns:
    
    the multivariate polynomial
  - asUnivariate
```
public abstract IUnivariatePolynomial asUnivariate()
```
    Converts this to univariate polynomial or throws exception if conversion is impossible (more than one variable have non zero exponents)
    
    Returns:
    
    univariate polynomial
    
    Throws:
    
    IllegalArgumentException - if this is not effectively a univariate polynomial
  - create
```
public final Poly create(Term... terms)
```
    Creates multivariate polynomial over the same ring as this from the list of monomials
    
    Parameters:
    
    terms - the monomials
    
    Returns:
    
    multivariate polynomial
  - create
```
public final Poly create(Iterable<Term> terms)
```
    Creates multivariate polynomial over the same ring as this from the list of monomials
    
    Parameters:
    
    terms - the monomials
    
    Returns:
    
    multivariate polynomial
  - create
```
public final Poly create(Term term)
```
    Creates multivariate polynomial over the same ring as this with the single monomial
    
    Parameters:
    
    term - the monomial
    
    Returns:
    
    multivariate polynomial
  - createConstantFromTerm
```
public abstract Poly createConstantFromTerm(Term term)
```
    Creates multivariate polynomial over the same ring as this with the single constant element taken from given monomial
    
    Parameters:
    
    term - the monomial
    
    Returns:
    
    multivariate polynomial
  - create
```
public final Poly create(DegreeVector term)
```
    Creates multivariate polynomial over the same ring as this with the single monomial
    
    Parameters:
    
    term - the monomial
    
    Returns:
    
    multivariate polynomial
  - createMonomial
```
public final Poly createMonomial(int variable,
                                 int degree)
```
    Creates monomial over the same ring as this of the form variable ^ degree
    
    Parameters:
    
    variable - the variable
    
    degree - the monomial degree
    
    Returns:
    
    monomial variable ^ degree
  - setOrdering
```
public final Poly setOrdering(Comparator<DegreeVector> newOrdering)
```
    Makes a copy of this with the new ordering newOrdering
    
    Parameters:
    
    newOrdering - the new ordering
    
    Returns:
    
    a copy of this with the new ordering
  - release
```
protected void release()
```
    release caches
  - size
```
public final int size()
```
    Returns the number of terms in this polynomial
    
    Specified by:
    
    size in interface IPolynomial<Term extends AMonomial<Term>>
    
    Returns:
    
    the number of terms
  - isZero
```
public final boolean isZero()
```
    Description copied from interface: IPolynomial
    
    Returns true if this is zero
    
    Specified by:
    
    isZero in interface IPolynomial<Term extends AMonomial<Term>>
    
    Returns:
    
    whether this is zero
  - isLinearOrConstant
```
public boolean isLinearOrConstant()
```
    Description copied from interface: IPolynomial
    
    Returns whether this polynomial is linear (i.e. of the form a * X + b)
    
    Specified by:
    
    isLinearOrConstant in interface IPolynomial<Term extends AMonomial<Term>>
  - isLinearExactly
```
public boolean isLinearExactly()
```
    Description copied from interface: IPolynomial
    
    Returns whether this polynomial is linear (i.e. of the form a * X + b with nonzero a)
    
    Specified by:
    
    isLinearExactly in interface IPolynomial<Term extends AMonomial<Term>>
  - isZeroCC
```
public boolean isZeroCC()
```
    Description copied from interface: IPolynomial
    
    Returns true if constant term is zero
    
    Specified by:
    
    isZeroCC in interface IPolynomial<Term extends AMonomial<Term>>
    
    Returns:
    
    whether constant term is zero
  - iterator
```
public final Iterator<Term> iterator()
```
    Specified by:
    
    iterator in interface Iterable<Term extends AMonomial<Term>>
  - ascendingIterator
```
public Iterator<Term> ascendingIterator()
```
  - descendingIterator
```
public Iterator<Term> descendingIterator()
```
  - first
```
public Term first()
```
  - last
```
public Term last()
```
  - collection
```
public final Collection<Term> collection()
```
  - toArray
```
public final Term[] toArray()
```
  - isMonomial
```
public final boolean isMonomial()
```
    Description copied from interface: IPolynomial
    
    Returns true if this polynomial has only one monomial term
    
    Specified by:
    
    isMonomial in interface IPolynomial<Term extends AMonomial<Term>>
    
    Returns:
    
    whether this has only one monomial term
  - isVariable
```
public final boolean isVariable()
```
    Returns whether this is a plain variable (with no coefficient)
  - toZero
```
public final Poly toZero()
```
    Description copied from interface: IPolynomial
    
    Sets this to zero
    
    Specified by:
    
    toZero in interface IPolynomial<Term extends AMonomial<Term>>
    
    Returns:
    
    this := zero
  - set
```
public final Poly set(Poly oth)
```
    Description copied from interface: IPolynomial
    
    Sets the content of this to oth
    
    Specified by:
    
    set in interface IPolynomial<Term extends AMonomial<Term>>
    
    Parameters:
    
    oth - the polynomial
    
    Returns:
    
    this := oth
  - dropVariable
```
public final Poly dropVariable(int variable)
```
    Makes a copy of this with the specified variable dropped
    
    Parameters:
    
    variable - the variable
  - dropVariables
```
public final Poly dropVariables(int[] variables)
```
    Makes a copy of this with the specified variable replaced with the unit
    
    Parameters:
    
    variables - the variables
  - dropSelectVariables
```
public final Poly dropSelectVariables(int... variables)
```
    Makes a copy of this with all variables except specified ones replaced with the units
    
    Parameters:
    
    variables - the variables
  - insertVariable
```
public final Poly insertVariable(int variable)
```
    Makes a copy of this by inserting new variable (the indexes will be shifted)
    
    Parameters:
    
    variable - the variable
  - insertVariable
```
public final Poly insertVariable(int variable,
                                 int count)
```
    Makes a copy of this by inserting new variables (the indexes will be shifted)
    
    Parameters:
    
    variable - the variable
    
    count - length of the insertion
  - setNVariables
```
public final Poly setNVariables(int newNVariables)
```
    auxiliary method
  - mapVariables
```
public final Poly mapVariables(int[] mapping)
```
    Renames old variables to new according to mapping
    
    Parameters:
    
    mapping - mapping from old variables to new variables
  - joinNewVariable
```
public final Poly joinNewVariable()
```
    Returns a copy of this with nVariables = nVariables + 1
    
    Returns:
    
    a copy of this with one additional (last) variable added
    
    See Also:
    
    insertVariable(int)
  - joinNewVariables
```
public final Poly joinNewVariables(int n)
```
    Returns a copy of this with nVariables = nVariables + m
    
    Returns:
    
    a copy of this with n additional (last) variables added
    
    See Also:
    
    insertVariable(int)
  - nUsedVariables
```
public final int nUsedVariables()
```
    Returns the number of really used variables (those which are not units)
    
    Returns:
    
    the number of variables (those which are not units)
  - degree
```
public int degree()
```
    Returns the total degree of this polynomial, that is the maximal total degree among all terms
    
    Specified by:
    
    degree in interface IPolynomial<Term extends AMonomial<Term>>
    
    Returns:
    
    the total degree of this polynomial, that is the maximal total degree among all terms
  - degree
```
public int degree(int... variables)
```
    Gives the degree in specified variables
  - degreeMax
```
public int degreeMax()
```
    Returns the maximal degree of variables in this polynomial
    
    Returns:
    
    the maximal degree of variables in this polynomial
  - degree
```
public final int degree(int variable)
```
    Returns the degree of this polynomial with respect to specified variable
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    the degree of this polynomial with respect to specified variable
  - degreesRef
```
protected int[] degreesRef()
```
    returns reference (content must not be modified)
  - degrees
```
public final int[] degrees()
```
    Returns an array of degrees of all variables, so that is i-th element of the result is the polynomial degree with respect to i-th variable
    
    Returns:
    
    array of degrees
  - multidegree
```
public final int[] multidegree()
```
    Returns the multidegree of this polynomial i.e. exponents of the leading term (without copying)
    
    Returns:
    
    the multidegree of this polynomial i.e. exponents of the leading term (without copying)
  - degrees
```
public final int[] degrees(int variable)
```
    Returns the array of exponents in which variable occurs in this polynomial
    
    Returns:
    
    the array of exponents in which variable occurs in this polynomial
  - degreeSum
```
public final int degreeSum()
```
    Returns the sum of degrees()
    
    Returns:
    
    sum of degrees()
  - totalDegree
```
public final int totalDegree()
```
    Returns the total degree, that is sum of degrees()
  - sparsity
```
public double sparsity()
```
    Sparsity level: size / (product of degrees)
  - sparsity2
```
public double sparsity2()
```
    Sparsity level: size / nDenseTerms where nDenseTerms is a total number of possible distinct terms with total degree not larger than distinct total degrees presented in this.
  - ecart
```
public final int ecart()
```
    Returns degreeSum - lt().totalDegree
  - isHomogeneous
```
public final boolean isHomogeneous()
```
    Returns whether all terms have the same total degree
  - homogenize
```
public final Poly homogenize(int variable)
```
    Homogenize poly by adding new (homogenizing) variable
    
    Parameters:
    
    variable - variable that will be inserted (homogenization variable)
  - isEffectiveUnivariate
```
public final boolean isEffectiveUnivariate()
```
    Returns whether this poly is effectively univariate (not more than one variable is non-unit)
    
    Returns:
    
    whether this poly is effectively univariate
  - univariateVariable
```
public final int univariateVariable()
```
    Returns -1 if this poly is not effectively univariate or variable in which it is univariate
    
    Returns:
    
    -1 if this poly is not effectively univariate or variable in which it is univariate
  - coefficientOf
```
public final Poly coefficientOf(int variable,
                                int exponent)
```
    Returns a coefficient before variable^exponent as a multivariate polynomial
    
    Parameters:
    
    variable - the variable
    
    exponent - the exponent
    
    Returns:
    
    coefficient before variable^exponent as a multivariate polynomial
  - coefficientOf
```
public final Poly coefficientOf(int[] variables,
                                int[] exponents)
```
    Returns a coefficient before variables^exponents as a multivariate polynomial
    
    Parameters:
    
    variables - the variables
    
    exponents - the exponents
    
    Returns:
    
    coefficient before variables^exponents as a multivariate polynomial
  - dropCoefficientOf
```
public final Poly dropCoefficientOf(int[] variables,
                                    int[] exponents)
```
    Returns a coefficient before variables^exponents as a multivariate polynomial and drops all such terms from this
    
    Parameters:
    
    variables - the variables
    
    exponents - the exponents
    
    Returns:
    
    coefficient before variables^exponents as a multivariate polynomial
  - asUnivariate
```
public final UnivariatePolynomial<Poly> asUnivariate(int variable)
```
    Converts this polynomial to a univariate polynomial over specified variable with the multivariate coefficient ring.
    
    Parameters:
    
    variable - variable which will be treated as univariate variable
    
    Returns:
    
    univariate polynomial over the ring of multivariate coefficients
    
    Throws:
    
    IllegalArgumentException - if this is not effectively a univariate polynomial
  - asUnivariateEliminate
```
public final UnivariatePolynomial<Poly> asUnivariateEliminate(int variable)
```
    Converts this polynomial to a univariate polynomial over specified variable with the multivariate coefficient ring.
    
    Parameters:
    
    variable - variable which will be treated as univariate variable
    
    Returns:
    
    univariate polynomial over the ring of multivariate coefficients
    
    Throws:
    
    IllegalArgumentException - if this is not effectively a univariate polynomial
  - asMultivariate
```
public static <Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>> Poly asMultivariate(UnivariatePolynomial<Poly> univariate,
                                                                                                                             int uVariable,
                                                                                                                             boolean join)
```
  - asOverUnivariate
```
public abstract MultivariatePolynomial<? extends IUnivariatePolynomial> asOverUnivariate(int variable)
```
    Converts this to a multivariate polynomial with coefficients being univariate polynomials over variable
    
    Parameters:
    
    variable - variable
    
    Returns:
    
    multivariate polynomial with coefficients being univariate polynomials over variable
  - asOverUnivariateEliminate
```
public abstract MultivariatePolynomial<? extends IUnivariatePolynomial> asOverUnivariateEliminate(int variable)
```
    Converts this to a multivariate polynomial with coefficients being univariate polynomials over variable, the resulting polynomial have (nVariable - 1) multivariate variables (specified variable is eliminated)
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    multivariate polynomial with coefficients being univariate polynomials over variable, the resulting polynomial have (nVariable - 1) multivariate variables
  - asOverMultivariate
```
public abstract MultivariatePolynomial<Poly> asOverMultivariate(int... variables)
```
    Converts this to a multivariate polynomial with coefficients being multivariate polynomials polynomials over variables that is polynomial in R[variables][other_variables]
    
    Parameters:
    
    variables - the variables to separate
    
    Returns:
    
    multivariate polynomial with coefficients being multivariate polynomials polynomials over variables that is polynomial in R[variables][other_variables]
  - asOverMultivariateEliminate
```
public final MultivariatePolynomial<Poly> asOverMultivariateEliminate(int... variables)
```
    Converts this to a multivariate polynomial with coefficients being multivariate polynomials polynomials over variables that is polynomial in R[variables][other_variables]
    
    Parameters:
    
    variables - the variables to separate
    
    Returns:
    
    multivariate polynomial with coefficients being multivariate polynomials polynomials over variables that is polynomial in R[variables][other_variables]
  - asOverMultivariateEliminate
```
public abstract MultivariatePolynomial<Poly> asOverMultivariateEliminate(int[] variables,
                                                                         Comparator<DegreeVector> ordering)
```
    Converts this to a multivariate polynomial with coefficients being multivariate polynomials polynomials over variables that is polynomial in R[variables][other_variables]
    
    Parameters:
    
    variables - the variables to separate
    
    ordering - monomial order to use for result
    
    Returns:
    
    multivariate polynomial with coefficients being multivariate polynomials polynomials over variables that is polynomial in R[variables][other_variables]
  - asMultivariate
```
public static <Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>> Poly asMultivariate(UnivariatePolynomial<Poly> uPoly,
                                                                                                                             int variable)
```
    Convert univariate polynomial over multivariate polynomials to a normal multivariate poly
    
    Parameters:
    
    uPoly - univariate polynomial over multivariate polynomials
    
    variable - the univariate variable
    
    Returns:
    
    multivariate poly
  - primitivePart
```
public abstract Poly primitivePart(int variable)
```
    Gives primitive part of this considered as R[variable][other_variables]
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    primitive part of this considered as R[variable][other_variables]
  - contentUnivariate
```
public abstract IUnivariatePolynomial contentUnivariate(int variable)
```
    Gives the content of this considered as R[variable][other_variables]
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    the content of this considered as R[variable][other_variables]
  - monic
```
public abstract Poly monic(Comparator<DegreeVector> ordering)
```
    Make this poly monic considering leading term with respect to given ordering
  - monicWithLC
```
public abstract Poly monicWithLC(Comparator<DegreeVector> ordering,
                                 Poly oth)
```
    Sets this to its monic part multiplied by the leading coefficient of other with respect to given ordering
  - content
```
public final Poly content(int variable)
```
    Gives the content of this considered as R[variable][other_variables]
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    the content of this considered as R[variable][other_variables]
  - contentExcept
```
public final Poly contentExcept(int variable)
```
    Gives the content of this considered as R[other_variables][variable]
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    the content of this considered as R[other_variables][variable]
  - multiplyByMonomial
```
public final Poly multiplyByMonomial(int variable,
                                     int exponent)
```
    Multiplies this by variable^exponent
    
    Parameters:
    
    variable - the variable
    
    exponent - the exponent
    
    Returns:
    
    this multiplied by variable^exponent
  - lc
```
public final Poly lc(int variable)
```
    Returns the leading coefficient of this viewed as R[other_variables][variable]
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    multivariate leading coefficient of this viewed as R[other_variables][variable]
  - setLC
```
public final Poly setLC(int variable,
                        Poly lc)
```
    Set the leading coefficient of specified variable to a specified value (this is considered as R[other_variables][variable])
    
    Parameters:
    
    variable - the variable
    
    lc - the leading coefficient of this viewed as R[other_variables][variable]
  - lt
```
public final Term lt(Comparator<DegreeVector> ordering)
```
    Returns the leading term in this polynomial according to specified ordering
    
    Returns:
    
    the leading term in this polynomial according to specified ordering
  - lt
```
public final Term lt()
```
    Returns the leading term in this polynomial according to ordering
    
    Returns:
    
    the leading term in this polynomial according to ordering
  - mt
```
public final Term mt()
```
    Returns the minimal term in this polynomial according to ordering
    
    Returns:
    
    the minimal term in this polynomial according to ordering
  - lcAsPoly
```
public abstract Poly lcAsPoly(Comparator<DegreeVector> ordering)
```
    Returns the leading coefficient with respect to specified ordering as a constant poly
  - ltAsPoly
```
public final Poly ltAsPoly()
```
    Returns the leading term in this polynomial according to ordering
    
    Returns:
    
    the leading term in this polynomial according to ordering
  - monomialContent
```
public final Term monomialContent()
```
    Returns the monomial content of this polynomial
    
    Returns:
    
    the monomial content of this polynomial
  - divideDegreeVectorOrNull
```
public final Poly divideDegreeVectorOrNull(DegreeVector monomial)
```
    Divides this polynomial by a monomial or returns null (causing loss of internal data) if some of the elements can't be exactly divided by the monomial. NOTE: if null is returned, the content of this is destroyed.
    
    Parameters:
    
    monomial - monomial
    
    Returns:
    
    this divided by the factor * monomial or null
  - divideOrNull
```
public abstract Poly divideOrNull(Term monomial)
```
    Divides this polynomial by a monomial or returns null (causing loss of internal data) if some of the elements can't be exactly divided by the monomial. NOTE: if null is returned, the content of this is destroyed.
    
    Parameters:
    
    monomial - monomial degrees
    
    Returns:
    
    this divided by the factor * monomial or null
  - add
```
public final Poly add(Poly oth)
```
    Description copied from interface: IPolynomial
    
    Adds oth to this.
    
    Specified by:
    
    add in interface IPolynomial<Term extends AMonomial<Term>>
    
    Parameters:
    
    oth - the polynomial
    
    Returns:
    
    this + oth
  - subtract
```
public final Poly subtract(Poly oth)
```
    Description copied from interface: IPolynomial
    
    Subtracts oth from this.
    
    Specified by:
    
    subtract in interface IPolynomial<Term extends AMonomial<Term>>
    
    Parameters:
    
    oth - the polynomial
    
    Returns:
    
    this - oth
  - subtract
```
public final Poly subtract(Term cf,
                           Poly oth)
```
    Subtracts cf * oth from this polynomial
  - add
```
public final Poly add(Term monomial)
```
    Adds monomial to this polynomial
    
    Parameters:
    
    monomial - the monomial
    
    Returns:
    
    this + monomial
  - put
```
public final Poly put(Term monomial)
```
    Puts monomial to this polynomial replacing the previous entry if was
  - subtract
```
public final Poly subtract(Term monomial)
```
    Subtracts monomial from this polynomial
    
    Parameters:
    
    monomial - the monomial
    
    Returns:
    
    this - monomial
  - negate
```
public final Poly negate()
```
    Description copied from interface: IPolynomial
    
    Negates this and returns
    
    Specified by:
    
    negate in interface IPolynomial<Term extends AMonomial<Term>>
    
    Returns:
    
    this negated
  - add
```
public final Poly add(Iterable<Term> monomials)
```
    Adds monomials to this polynomial
    
    Parameters:
    
    monomials - terms
    
    Returns:
    
    this + monomials
  - add
```
public final Poly add(Term... monomials)
```
    Adds monomials to this polynomial
    
    Parameters:
    
    monomials - terms
    
    Returns:
    
    this + monomials
  - subtractLt
```
public final Poly subtractLt()
```
    Removes the leading term from this polynomial
    
    Returns:
    
    this - this.lt()
  - multiply
```
public abstract Poly multiply(Term monomial)
```
    Multiplies this by the monomial
    
    Parameters:
    
    monomial - the monomial
    
    Returns:
    
    this multiplied by the monomial
  - multiplyByDegreeVector
```
public final Poly multiplyByDegreeVector(DegreeVector dv)
```
    Multiplies this by the degree vector
    
    Parameters:
    
    dv - the degree vector
    
    Returns:
    
    this multiplied by the degree vector
  - getSkeleton
```
public final Set<DegreeVector> getSkeleton()
```
    Returns skeleton of this poly
    
    Returns:
    
    skeleton of this poly
  - setAllCoefficientsToUnit
```
public final Poly setAllCoefficientsToUnit()
```
    Set all coefficients to units
  - getSkeleton
```
public final Set<DegreeVector> getSkeleton(int... variables)
```
    Returns skeleton of this poly with respect to specified variables
    
    Parameters:
    
    variables - the variables
    
    Returns:
    
    skeleton of this poly with respect to specified variables
  - getSkeletonDrop
```
public final Set<DegreeVector> getSkeletonDrop(int... variables)
```
    Returns skeleton of this poly with respect to specified variables
    
    Parameters:
    
    variables - the variables
    
    Returns:
    
    skeleton of this poly with respect to specified variables
  - getSkeletonExcept
```
public final Set<DegreeVector> getSkeletonExcept(int... variables)
```
    Returns skeleton of this poly with respect to all except specified variables
    
    Parameters:
    
    variables - the variables to exclude
    
    Returns:
    
    skeleton of this poly with respect to all except specified variables
  - sameSkeletonQ
```
public final boolean sameSkeletonQ(AMultivariatePolynomial oth)
```
    Tests whether this and oth have the same skeleton
    
    Parameters:
    
    oth - other multivariate polynomial
    
    Returns:
    
    true if this and oth have the same skeleton and false otherwise
  - sameSkeletonQ
```
public final boolean sameSkeletonQ(AMultivariatePolynomial oth,
                                   int... variables)
```
    Tests whether this and oth have the same skeleton with respect to specified variables
    
    Parameters:
    
    oth - other multivariate polynomial
    
    variables - variables to test
    
    Returns:
    
    true if this and oth have the same skeleton with respect to specified variables and false otherwise
  - sameSkeletonExceptQ
```
public final boolean sameSkeletonExceptQ(AMultivariatePolynomial oth,
                                         int... variables)
```
    Tests whether this and oth have the same skeleton with respect all except specified variables
    
    Parameters:
    
    oth - other multivariate polynomial
    
    variables - variables to exclude
    
    Returns:
    
    true if this and oth have the same skeleton with respect to all except specified variables and false otherwise
  - derivative
```
public final Poly derivative(int variable)
```
    Gives partial derivative with respect to specified variable (new instance created)
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    partial derivative with respect to specified variable
  - derivative
```
public abstract Poly derivative(int variable,
                                int order)
```
    Gives partial derivative of specified order with respect to specified variable (new instance created)
    
    Parameters:
    
    variable - the variable
    
    order - derivative order
    
    Returns:
    
    partial derivative of specified order with respect to specified variable
  - seriesCoefficient
```
public abstract Poly seriesCoefficient(int variable,
                                       int order)
```
    Gives (unevaluated) coefficient of Taylor series expansion for specified variable that is derivative(poly, variable, order) / order!, where the derivative is formal derivative and calculated with arithmetic performed in Z ring (to overcome possible zeros in Zp).
    
    Parameters:
    
    variable - the variable
    
    order - derivative order
    
    Returns:
    
    derivative(poly, variable, order) / order! , where the derivative is formal derivative and calculated with arithmetic performed in Z ring (to overcome possible zeros in Zp)
  - evaluateAtZero
```
public final Poly evaluateAtZero(int variable)
```
    Substitutes 0 for variable (new instance created).
    
    Parameters:
    
    variable - the variable
    
    Returns:
    
    a new multivariate polynomial with 0 substituted for variable
  - evaluateAtZero
```
public final Poly evaluateAtZero(int[] variables)
```
    Substitutes 0 for all specified variables (new instance created).
    
    Parameters:
    
    variables - the variables
    
    Returns:
    
    a new multivariate polynomial with 0 substituted for all specified variables
  - derivative
```
public final Poly[] derivative()
```
    Gives the derivative vector
    
    Returns:
    
    derivative vector
  - asOverPoly
```
public final MultivariatePolynomial<Poly> asOverPoly(Poly factory)
```
    Consider coefficients of this as constant polynomials of the same type as a given factory polynomial
    
    Parameters:
    
    factory - factory polynomial
  - composition
```
public final Poly composition(Poly... values)
```
    Substitutes given polynomials instead of variables of this (that is this(values_1, ..., values_N))
    
    Parameters:
    
    values - polynomial values (may have different nvars from this)
  - composition
```
public final <sPoly extends IUnivariatePolynomial<sPoly>> sPoly composition(sPoly... values)
```
    Substitutes given polynomials instead of variables of this (that is this(values_1, ..., values_N))
    
    Parameters:
    
    values - polynomial values (may have different nvars from this)
  - composition
```
public final <sPoly extends IUnivariatePolynomial<sPoly>> sPoly composition(Ring<sPoly> uRing,
                                                                            sPoly... values)
```
    Substitutes given polynomials instead of variables of this (that is this(values_1, ..., values_N))
    
    Parameters:
    
    uRing - ring of univariate polynomials
    
    values - polynomial values (may have different nvars from this)
  - composition
```
public final Poly composition(List<Poly> values)
```
    Substitutes given polynomials instead of variables of this (that is this(values_1, ..., values_N))
    
    Parameters:
    
    values - polynomial values (may have different nvars from this)
  - composition
```
public final Poly composition(int variable,
                              Poly value)
```
    Substitutes given polynomial instead of specified variable (that is this(x_1, ..., value, ..., x_N), where value is on the place of specified variable)
  - composition
```
public final Poly composition(int[] variables,
                              Poly[] values)
```
    Substitutes given polynomial instead of specified variable (that is this(x_1, ..., value, ..., x_N), where value is on the place of specified variable)
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - skeletonHashCode
```
public int skeletonHashCode()
```
  - clone
```
public abstract Poly clone()
```
    Description copied from interface: IPolynomial
    
    Deep copy of this
    
    Specified by:
    
    clone in interface IPolynomial<Term extends AMonomial<Term>>
    
    Overrides:
    
    clone in class Object
    
    Returns:
    
    deep copy of this
  - evaluateAtRandom
```
public abstract Poly evaluateAtRandom(int variable,
                                      org.apache.commons.math3.random.RandomGenerator rnd)
```
    Evaluates poly at random point
  - evaluateAtRandomPreservingSkeleton
```
public abstract Poly evaluateAtRandomPreservingSkeleton(int variable,
                                                        org.apache.commons.math3.random.RandomGenerator rnd)
```
    Evaluates poly at random point chosen in such way that the skeleton of evaluated version is the same as of the original poly with respect to all except variable variables
  - mapCoefficientsAsPolys
```
public abstract <E> MultivariatePolynomial<E> mapCoefficientsAsPolys(Ring<E> ring,
                                                                     Function<Poly,E> mapper)
```
  - toString
```
public final String toString()
```
    Overrides:
    
    toString in class Object

Class AMultivariatePolynomial<Term extends AMonomial<Term>,​Poly extends AMultivariatePolynomial<Term,​Poly>>

Nested Class Summary

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.Comparable

Methods inherited from interface cc.redberry.rings.poly.IPolynomial

Methods inherited from interface java.lang.Iterable

Methods inherited from interface cc.redberry.rings.io.Stringifiable

Field Detail

nVariables

ordering

monomialAlgebra

Method Detail

swapVariables

renameVariables

renameVariables

renameVariables

asMultivariate

asUnivariate

create

create

create

createConstantFromTerm

create

createMonomial

setOrdering

release

size

isZero

isLinearOrConstant

isLinearExactly

isZeroCC

iterator

ascendingIterator

descendingIterator

first

last

collection

toArray

isMonomial

isVariable

toZero

set

dropVariable

dropVariables

dropSelectVariables

insertVariable

insertVariable

setNVariables

mapVariables

joinNewVariable

joinNewVariables

nUsedVariables

degree

degree

degreeMax

degree

degreesRef

degrees

multidegree

degrees

degreeSum

totalDegree

sparsity

sparsity2

ecart

isHomogeneous

homogenize

isEffectiveUnivariate

univariateVariable

coefficientOf

coefficientOf

dropCoefficientOf

asUnivariate

asUnivariateEliminate

asMultivariate

asOverUnivariate

asOverUnivariateEliminate

asOverMultivariate

Class AMultivariatePolynomial<Term extends AMonomial<Term>,Poly extends AMultivariatePolynomial<Term,Poly>>