The SCIP Optimization Suite

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Published June 21, 2024 | Version release-710
Software Open

scipopt/soplex: v7.1.0

Authors/Creators

  • 1. Gurobi Optimization
  • 2. HTW and Zuse Institute Berlin
  • 3. Zuse Institute Berlin
  • 4. ZIB / TU Berlin
  • 5. TU Darmstadt
  • 6. Orange
  • 7. GAMS
  • 8. Forcepoint
  • 9. Consultant for the University of Edinburgh, School of Mathematics
  • 10. @DelfinaCare

Description

Interface & Parameters

  • add method SoPlexBase::numRefinements() to return number of iterative refinements
  • new optional argument writeZeroObjective to write functions of SoPlexBase
  • new functions SPxSolverBase::isTerminationValueEnabled(), SPxSolverBase::toggleTerminationValue(), and SPxSolverBase::factorizeAndRecompute()

Code Quality

  • add option to write dense objective to mps/lp files (including variables with zero objective coefficients)

Fixed Bugs

  • remove unused and incorrect SOPLEX_VERSION_API in cmake, SOPLEX_APIVERSION now always set in spxdefines.h
  • disable objective limits once if exceeding unscaled and unsimplified solution is not dual feasible
  • recompute solution from fresh factorization if objective limit is reached to avoid incorrect terminations
  • fix bug when writing bounds for unused variables in MPS file format

Miscellaneous

  • removed gzstream.h/hpp (L-GPL) and replaced it with zstr (MIT License) for .gz file handling

Files

scipopt/soplex-release-710.zip

Files (1.5 MB)

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md5:b710abafd395f189fa4afce11d9ad27d
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Additional details

Related works

Is supplement to
Software: https://github.com/scipopt/soplex/tree/release-710 (URL)