DifferentialOperatorTwo.h

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/*
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#ifndef DIFFERENTIAL_OPERATOR_TWO_H
#define DIFFERENTIAL_OPERATOR_TWO_H

#include <vector>
#include "PolynomialSum.h"
#include "TwoPolynomial.h"

namespace polynomial {

class DifferentialOperatorTwo {
public:
    DifferentialOperatorTwo();
    DifferentialOperatorTwo(const std::size_t &xDerivatives,
                            const std::size_t &sDerivatives);
    DifferentialOperatorTwo(const DifferentialOperatorTwo &doperator);
    ~DifferentialOperatorTwo();
    DifferentialOperatorTwo& operator= (
                             const DifferentialOperatorTwo &doperator);
    void resizeX(const std::size_t &xDerivatives);
    void resizeS(const std::size_t &sDerivatives);
    void differentiateX();
    void differentiateS();
    void multiplyPolynomial(const TwoPolynomial &poly);
    void setPolynomial(const TwoPolynomial &poly,
                       const std::size_t &x,
                       const std::size_t &s);
    void printOperator() const;
    void addOperator(const DifferentialOperatorTwo &doperator);
    std::size_t getXDerivatives() const;
    std::size_t getSDerivatives() const;
    bool isPolynomialZero(const std::size_t &x,
                          const std::size_t &s,
                          const std::size_t &term) const;
    void truncate(const std::size_t &truncateOrder);
    double evaluatePolynomial(const double &x,
                              const double &s,
                              const std::size_t &xDerivative,
                              const std::size_t &sDerivative,
                              const std::vector<double> &dSvalues) const;
    std::size_t numberOfTerms(const std::size_t &xDerivatives,
                              const std::size_t &sDerivatives) const;
    std::vector<std::size_t> getdSFactors(const std::size_t &xDerivatives,
                                          const std::size_t &sDerivatives,
                                          const std::size_t &p) const;
    void sortTerms();
private:
    std::vector<std::vector<PolynomialSum>> polynomials_m;
    std::size_t xDerivatives_m;
    std::size_t sDerivatives_m;
};

inline
    std::size_t DifferentialOperatorTwo::getXDerivatives() const {
        return xDerivatives_m;
}
inline
    std::size_t DifferentialOperatorTwo::getSDerivatives() const {
        return sDerivatives_m;
}

}

#endif