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Decision Optimization CPLEX & For Watson Studio

Showing 100

Implement piecewise linear features in Matlab API.

As for all the other APIs, it would be great to add to be able to describe PWLs with the new features introduced from 12.7.0, also in Matlab. The procedure to write several PWLs can become quite cumbersome for a large amount of constraints.
over 3 years ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Bring back the refresh-from-notebook button

In past versions of DO4DSX, there was something like 'refresh from notebook' button in the 'Run Model' tab of the Model Builder. Since the last few releases, that refresh link disappeared. Now I need to reinitialize the model, select the right not...

Add Python 3.12 and 3.13 binary wheel distributions for CPLEX

The Python Package Index only contains distributions of CPLEX for 3.11 (see https://pypi.org/project/cplex/#files). Please upload wheels for Python 3.12 and 3.13.

Add Apple Silicon builds of Python binary wheels for CPLEX

The Python package for cplex on the Python Package Index (https://pypi.org/project/cplex/#files) only provides macOS binaries for x86_64, not for Apple Silicon. Please upload binary wheels for Apple Silicon. In my industry (astronomy, astrophysics...

Ability to control cplex memory consumption

Nowadays optimization runs are more and more conducted in the cloud, in kubernetes environments. In kubernetes, the processes run inside containers in what are called pods. To prevent a pod to be killed when the node (machine) capacity is exceeded...

Use container / cgroup cores when automatically picking threads

Currently, when auto selecting the number of threads, it looks like cplex uses the number of cpu cores. That doesn't work for containers that are cpu limited using cgroups, as the number of threads will be equal to the host machine's cpu core coun...

Superior approximation algorithm for finding Maximum (or large) Cliques in very large graphs. (Multi-Partite Graphs can be found)

Our maximum clique finding algorithm (that is polynomial in its run time) and which seems (from DIMACS benchmark tests) to run better than other methods that are presently available would be beneficial to IBM because it would allow you to solve co...

a new parameter to control to force MIPStart if the variables are feasible

CPLEX choose to use MIPStart or not accoring to the heuristic. But sometimes the user think MIPStart values as particular variables is the best way to solve the problem. So we’d like to request a new parameter to control to force MIPStart if the v...
about 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Not under consideration

Document that mipgap and absmipgap are no pure termination criteria but can impact the path Cplex takes in B&C

As discussed in support case TS007960403, Cplex parameters mipgap and absmipgap can impact the path Cplex takes during Branch and Cut. I suggest to document this because from the description of the parameters one can expect that these are pure te...
about 2 years ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

Interface between CPLEX and FORTRAN

Since FORTRAN is one of the TOP20 programming languages in the TIOBE index (https://www.tiobe.com/tiobe-index/), I suggest that IBM create mixed-integer linear programming models with CPLEX and FORTRAN. I have not found a library similar to Concer...
over 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Not under consideration