integrate_by_parts.hh

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#pragma once
 
#include "Algorithm.hh"
 
namespace cadabra {
 
 
 
    class integrate_by_parts : public Algorithm {
        public:
            integrate_by_parts(const Kernel&, Ex&, Ex&);
 
            virtual bool     can_apply(iterator) override;
            virtual result_t apply(iterator&) override;
 
        private:
            // Integrate by parts on a single term in the integrand. First
            // argument points to the integral, second to a term in the
            // integrand.
            result_t handle_term(iterator, iterator&);
 
            // Are the given integral and derivative inverses of each-other?
            bool int_and_derivative_related(iterator int_it, iterator der_it) const;
 
            // Split one derivative from a multiple derivative.
            void split_off_single_derivative(iterator int_it, iterator der_it);
 
            // Wrap the indicated range of factor nodes inside the product node in
            // the derivative.
            Ex wrap(iterator, sibling_iterator, sibling_iterator) const;
 
            // Determine whether the indicated derivative acts on the 'away_from'
            // expression.
            bool derivative_acting_on_arg(iterator der_it) const;
 
            // Expression to move derivative away from.
            Ex away_from;
        };
 
    }