Sets or retrieves input or output device unit numbers.

Handles MATH/LIBRARY and STAT/LIBRARY type REAL and double precision options.

Minimizes a function of N variables using a conjugate gradient algorithm and a finite-difference gradient.

Minimizes a function of N variables using a conjugate gradient algorithm and a user-supplied gradient.

Minimizes a function of N variables using a modified Newton method and a user-supplied Hessian.

Minimizes a function of N variables using a modified Newton method and a finite-difference Hessian.

Minimizes a function of N variables using a modified Newton method and a finite-difference Hessian.

Minimizes a function of N variables using a quasi-Newton method and a finite-difference gradient.

Minimizes a function of N variables using a direct search polytope algorithm.

Normalizes the columns of a rank-2 or rank-3 array so each has Euclidean length of value one.

Solves a nonlinear least squares problem using a modified Levenberg-Marquardt algorithm and a finite-difference Jacobian.

Solves a nonlinear least squares problem using a modified Levenberg-Marquardt algorithm and a user-supplied Jacobian.

Finds the minimum point of a nonsmooth function of a single variable.

Finds the minimum point of a smooth function of a single variable using both function evaluations and first derivative evaluations.

Finds the minimum point of a smooth function of a single variable using only function evaluations.