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### Iteration Limits Policies

There are two policies that effect the iterative algorithms used to implement the special functions in this library:

    template <unsigned long limit = BOOST_MATH_MAX_SERIES_ITERATION_POLICY>
    class max_series_iterations;

    template <unsigned long limit = BOOST_MATH_MAX_ROOT_ITERATION_POLICY>
    class max_root_iterations;

The class `max_series_iterations` determines the maximum number of iterations permitted in a series evaluation, before the special function gives up and returns the result of evaluation_error.

The class `max_root_iterations` determines the maximum number of iterations permitted in a root-finding algorithm before the special function gives up and returns the result of evaluation_error.