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The Dantzig-Wolfe decomposition does not address unbounded subproblems and terminates with segfault for general decomposition problem instance.
Example is: https://github.com/Argonne-National-Labo…
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I am working on a unit commitment/energy dispatch model called PowNet. The model has 26.8k variables and 100k constraints. I want to exploit the structure of the problem by using the Dantzig-Wolfe dec…
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**Describe the bug**
The solution is not correct when using continuous variables _x_ instead of binary variables in the Generalized Assignment demo.
**To Reproduce**
```
using Coluna, Coluna…
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Hello! Your project really helped me with column generation and the cutting stock problem with CPLEX. Can you guide me with what should I modify to allow multiple rolls with different widths? Thank yo…
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I am a research fellow at the University of Bologna (Italy).
Currently, I am dealing with Stochastic Optimization and I am interested in using the DSP solver to solve a MIP problem whose mathematical…
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Dear support team,
I am currently working on a real class of scheduling problem, let me call Molding process.
In short: the problem is categorized as $(P_{m},s_{1} | r_{j}, due_{j}, S_{i,j}, pred,…
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**Short Description**
Coluna's MIP support is broken. If you submit a model with continuous variables, Coluna in many cases gives a wrong solution, or labels the problem as infeasible (despite a vali…
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Dear support team,
I solve a single instance (maximize) with pygcgopt and pyscipopt, but find different primal solutions. Pygcgopt terminates at 42.60s and outputs an "optimal" objective of +9.0676…
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### Screenshots
![image](https://user-images.githubusercontent.com/7928086/142559819-cc5b2466-d546-4284-be18-2b591ed09ed4.png)
![image](https://user-images.githubusercontent.…
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**Describe the bug**
```
Coluna
Version 0.7.0 | https://github.com/atoptima/Coluna.jl
***************************************************************************************
**** B&B tree root no…