young_project.hh

Go to the documentation of this file.

 
#pragma once
 
#include "Algorithm.hh"
#include "YoungTab.hh"
 
namespace cadabra {
 
    class young_project : public Algorithm {
        public:
            young_project(const Kernel&, Ex&);
            young_project(const Kernel&, Ex&, const std::vector<int>& shape, const std::vector<int>& indices);
 
            virtual bool     can_apply(iterator);
            virtual result_t apply(iterator&);
 
            // Boxes represent tensor slots, the values in them
            // give the location in the tensor.
            typedef yngtab::filled_tableau<unsigned int> pos_tab_t;
            typedef yngtab::filled_tableau<iterator>     name_tab_t;
            pos_tab_t  tab;
            name_tab_t nametab;
            combin::symmetriser<unsigned int> sym;
 
            // Implicit antisymmetry; used by tableaux.cc only so far. These
            // store index locations, so these are "values" from the
            // combinatorics.hh point of view.
            combin::combinations<unsigned int>::permuted_sets_t asym_ranges;
            bool remove_traces;
 
        private:
            iterator nth_index_node(iterator, unsigned int);
        };
 
    }