The SCIP Optimization Suite

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Published November 6, 2024 | Version v2.4.0
Software Open

scipopt/papilo: v2.4.0

Creators

  • 1. Zuse Institute Berlin
  • 2. Consultant for the University of Edinburgh, School of Mathematics
  • 3. GAMS
  • 4. Johns Hopkins University
  • 5. HTW and Zuse Institute Berlin
  • 6. University of Twente
  • 7. Inria
  • 8. University of Helsinki
  • 9. Forcepoint
  • 10. Zero

Description

Interface changes

Changed parameters

  • presolve.abortfac = 0.00080000000000000004: abort factor of weighted number of reductions for exhaustive presolving
  • presolve.lpabortfac = 0.01: abort factor of weighted number of reductions for exhaustive LP presolving

New parameters with default values

  • numerics.useabsfeas = 1: whether to use an absolute tolerance for feasibility checks
  • presolve.abortfacfast = 0.00080000000000000004: abort factor of weighted number of reductions for fast presolving
  • presolve.abortfacmedium = 0.00080000000000000004: abort factor of weighted number of reductions for medium presolving
  • presolve.lpabortfacfast = 0.01: abort factor of weighted number of reductions for fast LP presolving
  • presolve.lpabortfacmedium = 0.01: abort factor of weighted number of reductions for medium LP presolving

Build system

  • updated FindTBB.cmake
  • revised the CMake configuration to export the PaPILO dependencies (papilo-config.cmake)

Fixed bugs

  • all fast presolvers: maintain changed activities of current and last round to avoid missing reductions
  • FixContinuous: only fix column which contribution deviates by at most epsilon in every row
  • Components: identify fixing a component to an optimal solution as strong dual reduction

Files

scipopt/papilo-v2.4.0.zip

Files (2.1 MB)

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md5:4e775da991f36c3dcdeb306b954087ea
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Additional details

Related works

Is supplement to
Software: https://github.com/scipopt/papilo/tree/v2.4.0 (URL)