4#include <gsl/gsl_vector.h>
double unwrap_lambda_multidim(const gsl_vector *t, void *params)
void unwrap_lambda_gradient(const gsl_vector *t, void *params, gsl_vector *g)
double unwrap_lambda_unidim(double x, void *p)
void unwrap_lambda_func_and_gradient(const gsl_vector *t, void *params, double *f, gsl_vector *g)
double f(double x)
Wilson special function f depending on x.