# BACKTRACK_BINARY_RC Binary Backtrack Search Using Reverse Communication

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

### Languages:

BACKTRACK_BINARY_RC is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version and a Python version.

### Related Data and Programs:

BISECTION_RC, a MATLAB library which seeks a solution to the equation F(X)=0 using bisection within a user-supplied change of sign interval [A,B]. The procedure is written using reverse communication (RC).

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

LOCAL_MIN_RC, a MATLAB library which finds a local minimum of a scalar function of a scalar variable, without the use of derivative information, using reverse communication (RC), by Richard Brent.

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

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

SUBSET, a MATLAB library which enumerates, generates, randomizes, ranks and unranks combinatorial objects including combinations, compositions, Gray codes, index sets, partitions, permutations, polynomials, subsets, and Young tables. Backtracking routines are included to solve some combinatorial problems.

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

### Source Code:

• backbin_rc.m, uses reverse communication for binary backtracking.
• timestamp.m, prints the YMDHMS date as a timestamp.

### Examples and Tests:

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

Last revised on 31 December 2013.