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The main features of GIPALS Linear Programming Environment are:

  • The maximum number of variables is Unlimited or 15,000 .
  • The maximum number of linear constraints is Unlimited or 15,000.
  • Flexible windows positions. 
  • Direct input Linear Program (LP) in sparse form by a grid editor (useful for small and medium LP sizes).
  • Direct input LP in compact form using special constraint body editor (useful for large LP sizes).
  • Import LP from files in MPS (Mathematical Programming System) format.
  • Export LP to files in MPS format.
  • Activation / Deactivation of any variables or constraints for advanced problem analysis.
  • Store LP in XML format.
  • Export the solution in CSV (Comma-delimited), Tab-delimited or HTML file formats.
  • Flexible debug options.
  • Sorting the data on-a-fly by any column in the grid.
  • Rounding the results.
  • Report the primal and dual variables and the slacks.

The main features of GIPALS Linear Programming Solver are:

  • Primal-Dual Interior Point Method (Mehrotra Predictor-Corrector).
  • Adjustable Preprocessor.
  • Scaling of the Linear Program.
  • Detection and extracting dense columns.
  • Sparse Cholesky factorization.
  • Minimal degree ordering, with supernodes.
  • Higher order Gondzio correction strategy.
  • Iterative refinement (using preconditioned conjugate gradient algorithm).

GIPALS provides several additional tools:

  • View the palette of LP constrains matrix.

 

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