G1a. Unconstrained optimization of a general univariate function

Functions
double	dfmin (double a, double b, double(*f)(double), double tol)
	Minimum of a single variable general nonlinear function
void	dfmin_r (double a, double b, double tol, double *xx, double yy, int *irev)
	Minimum of a single variable general nonlinear function (reverse communication version)

Detailed Description

This is the group of G1a. Unconstrained optimization of a general univariate function.