Through the Academic Initiative (AI) program, IBM provides CPLEX Optimization Studio and other resources at no charge to students, teachers and researchers. The version provided is the fully functional one, with no limitations in the size of the models or the search tree. For quick access to CPLEX Optimization Studio through this program, go to. 2 (for Windows users) Download the AMPL Student Edition zip archive file, amplcml.zip. Then follow the instructions below to unpack and run the AMPL program, the CPLEX 11.2, Gurobi 2.0, and MINOS 5.5 solvers, and the Kestrel client for free access to additional solvers over the Internet. Once AMPL is running, you can type commands just as they.
Version 12.9 of IBM ILOG CPLEX Optimization Studio
July 01, 2019
IBM ILOG CPLEX Optimization Studio Version 12.9 is now available on Passport Advantage for commercial users, through the Academic Initiative program for academics and students, and as a trial version for all.
The most prominent changes:
- Performance improvements on a wide range of problem types
Additional information about this new release can be found in the release notes. Learn more about IBM ILOG CPLEX Optimization Studio by visiting the IBM product page.
IBM ILOG CPLEX is the best known and most widely used large-scale solver. Its efficiency and robustness have been demonstrated over two decades in thousands of commercial installations worldwide.
Summary
Developer: IBM ILOG
Current version: 20.1
Problem types supported: Linear and quadratic optimization in continuous and integer variables. Support is provided for both convex and nonconvex quadratic objectives, and for convex quadratic constraints.
Special forms detected: Logical implications in the form of “indicator” constraints. Convex quadratic expressions in objectives, and convex quadratic constraints of elliptic and conic types.
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Algorithms available: For continuous problems, primal and dual simplex, interior-point (barrier); for integer problems, advanced branch-and-bound with presolve, feasibility heuristics, and cut generators. For continuous problems comprised mostly or entirely of linear network flow constraints, network simplex.
Special features: Shared-memory parallel processing for barrier, branch-and-bound. Concurrent optimization by several methods to determine best choice. Special facilities for parameter tuning and infeasibility diagnosis.
See also:ILOG CP for AMPL, covered by the CPLEX for AMPL license, for access to constraint programming and more general CPLEX handling of logical constraints.
Further information
IBM ILOG CPLEX website
CPLEX for AMPL option listing
CPLEX-AMPL interface source code with makefiles and instructions
Instructions for joining the IBM Academic Initiative
CPLEX for AMPL 12.2 User’s Guide
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