COPT Changelog

20230424

  • Changes in the MP library: added variable names support and removed spurious starting solution

20230330

  • Recognition of second-order conic constraints from algebraic representations and conversion into quadratic constraints; COPT appears to recognize second-order cones from quadratics.

20230207

  • Changes in the MP library

  • Updated to Copt 6.0.4, which includes bugfixes

  • Added support for unbounded/Farkas rays calculation

20221228

  • Changes in MP

20221222

  • Bug fixes in MP

20221211

  • Changes in MP: added the ==> else operator Implemented implication with ‘else’: constr1 ==> constr2 [else constr3]

  • Changes in MP: PLApproxRelTol, PLApproxDomain Parameters to control piecewise-linear approximation. cvt:plapprox:reltol default value changed from 1e-5 to 0.01.

20230207

  • Updated to Copt 6.0.1, which includes: many performance improvements native support for quadratic constraints

20221012

  • Piecewise-linear approximation of quadratics For non-convex quadratics, set the following options: cvt:quadobj=0 and/or cvt:quadcon=0.

20220928

  • Changes in MP: piecewise-linear approximations of nonlinear functions, default value of big-M

20220715

  • Updated to Copt 5.0.1, which includes many performance improvements

  • Added feasibility relaxation (see alg:feasrelax)

  • New parameters: alg:iismethod

20220615

  • New parameter: crossover

  • Minor changes to parmeter names

20220526

  • SOS constraints are now detected also if the .ref suffix is integer

  • Minor changes to parmeter names

20220511

  • Complementarity constraints: also quadratics Complementarity constraints now handle quadratics.

  • Branch develop is used for new code The active development branch is now develop.

  • Convert quadratic range constraints to QuadCon(LE/EQ/GE) COPT does not support quadratic range constraints. Conversion of linear range constraints into one-side rhs constraints has been generalized for any algebraic ones.

20220411

  • First mp-based release, linked with COPT libraries 4.0.5