# LOCAL_MIN_RC Reverse Communication Function for Local Minimum, by Richard Brent

LOCAL_MIN_RC is a FORTRAN90 library which seeks a local minimum of a scalar function of a scalar variable, without requiring derivatives, or assuming the function is differentiable, using reverse communication (RC), by Richard Brent.

### Languages:

LOCAL_MIN_RC is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

### Related Data and Programs:

ASA047, a FORTRAN90 library which minimizes a scalar function of several variables using the Nelder-Mead algorithm.

BACKTRACK_BINARY_RC, a FORTRAN90 library which carries out a backtrack search for a set of binary decisions, using reverse communication (RC).

BISECTION_RC, a FORTRAN90 library which demonstrates the simple bisection method for solving a scalar nonlinear equation in a change of sign interval, using reverse communication (RC).

BRENT, a FORTRAN90 library which contains routines for finding zeroes or minima of a scalar function of a scalar variable, without the use of derivative information, including a reverse communication (RC) option, by Richard Brent.

CG_RC, a FORTRAN90 library which implements the conjugate gradient (CG) method for solving a positive definite sparse linear system A*x=b, using reverse communication (RC).

COMPASS_SEARCH, a FORTRAN90 library which seeks the minimizer of a scalar function of several variables using compass search, a direct search algorithm that does not use derivatives.

NMS, a FORTRAN90 library which includes versions of Brent's minimizer and zero finder.

PRAXIS, a FORTRAN90 library which minimizes a scalar function of several variables.

ROOT_RC, a FORTRAN90 library which seeks a solution of a scalar nonlinear equation f(x) = 0, or a system of nonlinear equations, using reverse communication (RC), by Gaston Gonnet.

ROOTS_RC, a FORTRAN90 library which seeks a solution of a system of nonlinear equations f(x) = 0, using reverse communication (RC), by Gaston Gonnet.

SORT_RC, a FORTRAN90 library which can sort a list of any kind of objects, using reverse communication (RC).

TEST_OPT, a FORTRAN90 library which defines test problems requiring the minimization of a scalar function of several variables.

TEST_OPTIMIZATION, a FORTRAN90 library which defines test problems for the minimization of a scalar function of several variables, as described by Molga and Smutnicki.

TOMS178, a FORTRAN90 library which optimizes a scalar functional of multiple variables using the Hooke-Jeeves method.

ZERO_RC, a FORTRAN90 library which seeks a solution of a scalar nonlinear equation f(x) = 0, using reverse communication (RC), by Richard Brent.

### Author:

Original FORTRAN77 version by Richard Brent; FORTRAN90 version by John Burkardt.

### Reference:

1. Richard Brent,
Algorithms for Minimization without Derivatives,
Dover, 2002,
ISBN: 0-486-41998-3,
LC: QA402.5.B74.

### List of Routines:

• LOCAL_MIN_RC seeks a minimizer of a scalar function of a scalar variable.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the FORTRAN90 source codes.

Last revised on 29 November 2016.