polynomials.hh

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#pragma once
 
// standard library
#include <cmath>
#include <vector>
 
// DiFfRG
#include <DiFfRG/common/utils.hh>
 
namespace DiFfRG
{
  class Polynomial
  {
  public:
    Polynomial(const std::vector<double> &coefficients);
 
    const double &operator[](const uint &i) const;
 
    double &operator[](const uint &i);
 
    double operator()(const double &x) const;
 
    void operator*=(const double &scalar);
 
    void operator*=(const Polynomial &other);
 
    Polynomial anti_derivative(const double &integration_constant) const;
 
    Polynomial derivative() const;
 
    double integral(const double &x_min, const double &x_max) const;
 
    Polynomial square_argument() const;
 
  private:
    std::vector<double> coefficients;
  };
} // namespace DiFfRG