SoPlex is an optimization package for solving linear programming problems (LPs) based on an advanced implementation of the primal and dual revised simplex algorithm. It provides special support for the exact solution of LPs with rational input data. It can be used as a standalone solver reading MPS or LP format files via a command line interface as well as embedded into other programs via a C++ class library. The main features of SoPlex are:
SoPlex has been used in numerous research and industry projects and is the standard LP solver linked to the mixed-integer nonlinear programming and constraint integer programming solver SCIP. SoPlex is free for academic research and available in source code. It can be licensed for commercial use.
|05/Feb/2018||Version 3.1.1 released. CHANGELOG|
|21/Dec/2017||Version 3.1.0 released. Release Notes|
|01/Sep/2017||Version 3.0.1 released. Release Notes|
|09/Mar/2017||Version 3.0.0 released. Release Notes|
|29/Feb/2016||Version 2.2.1 released. Release Notes|
|01/Jul/2015||Version 2.2.0 released. Release Notes|
|23/Mar/2015||Binaries for Windows available for download.|
|18/Dec/2014||Version 2.0.1 released. Release Notes|
|07/Mar/2014||Binaries for Linux and Windows available for download.|
|27/Feb/2014||Version 2.0.0 released. Release Notes|
|16/Oct/2013||Version 1.7.2 released. Release Notes|
|04/Jan/2013||Version 1.7.1 released. Release Notes|
|31/Jul/2012||Version 1.7.0 released. Release Notes|
|28/Oct/2011||Version 1.6.0 released. Release Notes|
|30/Sep/2010||Version 1.5.0 released. Release Notes|
|06/Aug/2010||Patch 1.4.2c available for download providing an additional interface method to set a starting basis in the SoPlex class.|
|19/Jan/2010||Patch 1.4.2b available for download. Please update if you encounter problems in combination with older compiler versions.|
|12/Jun/2009||Patch 1.4.2a available for download. Please update.|
|11/Sep/2009||Version 1.4.2 released. Release Notes|
|20/Feb/2009||Version 1.4.1 released. Release Notes|
|30/Sep/2008||Version 1.4.0 released. Release Notes|
|27/Aug/2007||Version 1.3.2 released. Release Notes|
|17/Nov/2006||Version 1.3.1 released. Release Notes|
|03/Feb/2006||Version 1.3.0 released. Release Notes|
|10/Apr/2002||Version 1.2.1 released. Release Notes|
|14/Jan/2002||Version 1.2.0 released. Release Notes|
SoPlex is distributed under the ZIB Academic License. You
are allowed to retrieve SoPlex for research
purposes as a member of a non-commercial and
If you want to use SoPlex commercially or if you are interested in maintenance and support, please contact us by sending an email to Thorsten Koch.
Any publication for which SoPlex is used must include an acknowledgement and a reference to one of the following articles, depending on the version used:
The SCIP Optimization Suite 5.0
Ambros Gleixner, Leon Eifler, Tristan Gally, Gerald Gamrath, Patrick Gemander, Robert Lion Gottwald, Gregor Hendel, Christopher Hojny, Thorsten Koch, Matthias Miltenberger, Benjamin Müller, Marc E. Pfetsch, Christian Puchert, Daniel Rehfeldt, Franziska Schlösser, Felipe Serrano, Yuji Shinano, Jan Merlin Viernickel, Stefan Vigerske, Dieter Weninger, Jonas T. Witt, Jakob Witzig
ZIB-Report 17-61, Zuse Institute Berlin, December 2017
The SCIP Optimization Suite 4.0
Stephen J. Maher, Tobias Fischer, Tristan Gally, Gerald Gamrath, Ambros Gleixner, Robert Lion Gottwald, Gregor Hendel, Thorsten Koch, Marco E. Lübbecke, Matthias Miltenberger, Benjamin Müller, Marc E. Pfetsch, Christian Puchert, Daniel Rehfeldt, Sebastian Schenker, Robert Schwarz, Felipe Serrano, Yuji Shinano, Dieter Weninger, Jonas T. Witt, Jakob Witzig
ZIB-Report 17-12, Zuse Institute Berlin, March 2017
The SCIP Optimization Suite 3.2
Gerald Gamrath, Tobias Fischer, Tristan Gally, Ambros M. Gleixner, Gregor Hendel, Thorsten Koch, Stephen J. Maher, Matthias Miltenberger, Benjamin Müller, Marc E. Pfetsch, Christian Puchert, Daniel Rehfeldt, Sebastian Schenker, Robert Schwarz, Felipe Serrano, Yuji Shinano, Stefan Vigerske, Dieter Weninger, Michael Winkler, Jonas T. Witt, Jakob Witzig
ZIB-Report 15-60, Zuse Institute Berlin, February 2016
If you use SoPlex as an exact rational LP solver, please cite the references
Improving the Accuracy of Linear Programming Solvers with Iterative Refinement
Ambros M. Gleixner, Daniel E. Steffy, Kati Wolter
Proc. of ISSAC '12, pages 187--194, 2012, available as ZIB-Report 12-19
The files you can download here come without warranty. Use at your own risk!
SoPlex is implemented in C++. The code should be compliant with the current ANSI standard. With a modern C++ compiler you should be able to compile the code on any platform.
More details can be found in the Doxygen documentation.
SoPlex is also available on the NEOS Server, where you can post your model in LP or MPS format to solve it.
For questions about SoPlex or to report a bug, please write to firstname.lastname@example.org.
|Sebastian Orlowski||now at atesio|
|Roland Wunderling||former main developer - now at IBM|