README.txt file for qbsolv This directory contains the following files and directories: - README.txt: this file - License: A copy of the Apache License Version 2.0 - src: Source directory of the qbsolv program with Makefile that creates a binary read and solve "QUBO" files - example: Directory of example(s) application(s) using qbsolv as a solver - tests: Directory of scripts and qubo(s) to test qbsolv - contrib.txt: Instructions for potential contributors qbsolv (qb for qubo, solv for solve ) qbsolv -i infile [-o outfile] [-m] [-T] [-n] [-S SubMatrix] [-w] [-h] [-v verbosityLevel] [-V] [-q] DESCRIPTION qbsolv executes a quadratic unconstrained binary optimization (QUBO) problem represented in a file, providing bit-vector result(s) that minimizes (or optionally, maximizes) the value of the objective function represented by the QUBO. The problem is represented in the QUBO(5) file format and notably is not limited to the size or connectivity pattern of the D-Wave system on which it will be executed. The options are as follows: -i infile The name of the file in which the input QUBO resides. This is a required option. -o outfile This optional argument denotes the name of the file to which the output will be written. The default is the standard output. -m This optional argument denotes to find the maximum instead of the minimum. -T target This optional argument denotes to stop execution when the target value of the objective function is found. -t timeout This optional argument stops execution when the elapsed cpu time equals or exceeds timeout value. Timeout is only checked after completion of the main loop. Other halt values such as 'target' and 'repeats' will halt before 'timeout'. The default value is 2592000.0. -n repeats This optional argument denotes, once a new optimal value is found, to repeat the main loop of the algorithm this number of times with no change in optimal value before stopping. The default value is 50. -S subproblemSize This optional argument indicates the size of the sub- problems into which the QUBO will be decomposed. A subproblem size of 0 (the default) indicates to use the size known by qbsolv to be most effective for the D-Wave system targeted for execution. A subproblem size greater than zero indicates to use the given size and execute with qbsolvs internal classical tabu solver rather than using the D-Wave system. -w If present, this optional argument will print the QUBO matrix and result in .csv format. -h If present, this optional argument will print the help or usage message for qbsolv and exit without execution. -v verbosityLevel This optional argument denotes the verbosity of output. A verbosityLevel of 0 (the default) will output the number of bits in the solution, the solution, and the energy of the solution. A verbosityLevel of 1 will output the same information for multiple solutions, if found. A verbosityLevel of 2 will also output more detailed information at each step of the algorithm. -V If present, this optional argument will emit the version number of the qbsolv program and exit without execution. -q If present, this optional argument triggers printing the format of the QUBO file. -r seed Used to reset the seed for the random number generation
edwardjrhodes/qbsolv
qbsolv is a metaheuristic or partitioning solver that solves a potentially large quadratic unconstrained binary optimization (QUBO) problem by splitting it into pieces that are solved either on a D-Wave system or via a classical tabu solver.
CApache-2.0