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It would be nice if we indicate this only if at least one lazy cut callback is defined.
For this, I suggest to transform CutCallbacks to CutCallback which separates only one family of cuts. CutCallba…
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Currently, the nodes in the Branch-and-Price tree (AbstractBranchAndPrice.java, frameworks.columnGeneration package)are solved one by one. To take advantage of modern CPUs, functionality should be add…
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Hi sir,
I am an undergraduate at BJUT. I am writing to ask could you please explain what is the "upper bound" of your branch and price model and how do you establish it?
Best wishes,
Liuxin
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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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I'm trying to implement a column generation algorithm for a 1-dimension cutting stock problem, and with larger datasets I'm observing some very puzzling and erratic behaviour that I can't understand. …
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**Current issues**
- The current implementation of ColumnGeneration is not 100% clean and there is a confusion with the phases when dealing with infeasible master problem with artificial variables.
…
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**Describe the bug**
```
Coluna
Version 0.7.0 | https://github.com/atoptima/Coluna.jl
***************************************************************************************
**** B&B tree root no…
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**Describe the bug**
When using a branch-and-price algorithm to solve Generalized Assignment Problem instances with Mosek as an external solver, an error is thrown.
`ERROR: LoadError: Mosek.MosekE…
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**Describe the bug**
Cannot solve an MILP with Coluna!!
**To Reproduce**
The error can be reproduced by running the code attached!!
**Expected behavior**
What's reason for this kind of error?…
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Hello,
I'm experiencing a problem with Coluna.Algorithm.ColumnGeneration on my model.
If I use the following constructor :
`coluna = optimizer_with_attributes(
Coluna.Optimizer,
"p…