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What's New

SYMPHONY 5.1.10 released
  • Updated documentation.
  • Updated externals.
  • Fixed minor portability issues to allow successful build and execution with Sun studio compilers and xlc.
  • Eliminated compiler warnings.
What is SYMPHONY?

SYMPHONY is an open-source solver for mixed-integer linear programs (MILPs) written in C. It can be used in three different main modes:

  • As a callable library through either the native C interface or through the Osi.
  • As an interactive solver using a command-line interface.
  • As a framework to build customized solvers for specific problem classes.
SYMPHONY can be executed in either parallel (distributed or shared memory) or sequential modes and has a number of advanced features that make it unique, including the ability to
  • solve biobjective MILPs,
  • warm start the solution procedure, and
  • perform basic sensitivity analyses.

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Contact Us

This site is maintained by

Ted Ralphs
CORAL Laboratory
Department of Industrial and Systems Engineering
Lehigh University
Bethlehem, PA
(610)758-4784

tkralphs@lehigh.edu