19 #ifndef ERKALE_CHEBYSHEV
20 #define ERKALE_CHEBYSHEV
26 void chebyshev(
int n, std::vector<double> & x, std::vector<double> & w);
29 void radial_chebyshev(
int n, std::vector<double> & r, std::vector<double> & wr);
32 void radial_chebyshev_jac(
int n, std::vector<double> & r, std::vector<double> & wr);