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v1.1-beta1

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@andreaslundell andreaslundell released this 12 Jul 13:59
· 241 commits to master since this release
releases/1.1-beta1
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What's new in version 1.1?

Major features

  • SHOT no longer needs an external NLP solver in its primal strategy since SHOT can now call itself for solving fixed NLP problems. Activated with Primal.FixedInteger.Solver=2. For nonconvex problems it is still recommended to use an external NLP solver.

  • Partition convex nonseparable quadratic functions as separate constraints using an eigenvalue decomposition-based reformulation. Activated with Model.Reformulation.Quadratics.UseEigenValueDecomposition=true.

  • Support for performing an initial polyhedral approximation of the nonlinear feasible set before feasibility-based bound tightening. Activated with Model.BoundTightening.InitialPOA.Use=true.

  • Support for problems containing semi-continuous and semi-integer variables.

  • Support for problems containing special ordered sets.

Minor improvements and bug fixes

  • Improved support for generating supporting hyperplanes for the entire nonlinear feasible set instead of the feasible sets for the individual constraint functions. Activated with Dual.ESH.Rootsearch.UseMaxFunction=true.

  • Improved support for passing nonconvex quadratic functions directly to the MIP solver (if supported).

  • Bug fixes to the AMPL interface.

Assets 2