Matthias Miltenberger
Gurobi Optimization Support Manager - Berlin, Germany
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Articles
Recent activity by Matthias Miltenberger-
How do I efficiently add constraints using std::vector in C++?
When building constraints in C++ using the following data structures: std::vector<double> a;std::vector<GRBVar> x; The most efficient method is to use addTerms() to construct a linear expression in...
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Why does Gurobi perform differently on different machines?
Solving the same model on different machines can result in different solution paths. This effect is a well-known phenomenon called "Performance Variability". Hardware plays an important role as th...
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Is there a way to predict how long it will take Gurobi to solve a MIP?
Estimating the time it takes to solve a MIP is very difficult. The nature of NP-hard problems is that they can take a very long time to solve or may not even be solvable in a reasonable amount of t...
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How do I change parameters in a callback?
Changing parameters in a callback is not possible in Gurobi v9. Instead, parameters can be updated by: terminating the optimization process in the callback, changing the parameter value, and then ...
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What are the options for using an academic license on the cloud?
Gurobi offers three academic options for cloud computing: If you can connect to your university's network from the cloud instance via a VPN, you can set up a free academic license file yourself by...
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Releasing the GIL in Python API
Since Gurobi version 9.1, the Global Interpreter Lock (GIL) is released during the optimization process which takes place on a lower level. This enables user programs to execute other Python code i...
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How do I use CMake to build Gurobi C/C++ projects?
CMake is a platform-independent build system to compile C/C++ code. To link Gurobi into your project you can extend the template attached to this article, which consists of: FindGUROBI.cmake to de...
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How do I extract files from the Gurobi MSI installer package?
Typically, Gurobi can be installed on a Windows machine by double-clicking on the downloaded Gurobi .msi (Microsoft installer) file. Installing Gurobi on Windows requires administrator permissions ...
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How do I resolve "undefined reference" errors while linking Gurobi in C++?
We want to make the C++ API compatible with as many different compilers and compiler versions as possible. For that reason, we provide source files for the API so you can build the library yourself...
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How do I set up a license without installing the full Gurobi package?
For users who cannot install the full Gurobi Package but still need the license tools grbgetkey and grbprobe and/or the token server grb_ts, we have collected those three tools for download here: ...