A network model: Pyomo vs GAMS
Network models are an important class of optimizations, in itself but also as part of larger models. In [1] a nice presentation is given on how to set up a network model in the Python-based modeling...
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Stable Marriage Problem
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matrix operations via GAMS Embedded Python: multi-regional Input-Output tables
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Huber regression: different formulations
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Reallocate people: a very small but interesting LP
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A covering problem: runners vs Ragnar relay legs
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Another Rook Tour on the Chessboard
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2d knapsack problem
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Stacking 3d boxes under rotation
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A multi-objective nonlinear integer programming problem
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View ArticleTransportation Model (sharing a PowerPoint presentation)
trnsport.gms is the first model in the GAMS model library. Here I am using it to give an introduction in GAMS. The Powerpoint presentation has three major sections:the historical importance of the...
View ArticleShortest path in GAMS
Here is a presentation for a GAMS workshop. We focus on the Shortest Path LP problem. I use this model to discuss a lot of different things:Modeling networks in GAMSSparse data structures in GAMSRandom...
View ArticleSolve status: not as easy as it looks
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MacMahon Squares
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Importing JSON files into GAMS
JSON (JavaScript Object Notation) files [1] provide a flexible and simple way to store and exchange data. It is text, so we can easily look at it. JSON files typically have the extension .json. (using...
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An All-Paths Network Problem
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Coloring the US county map
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A different coloring problem
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View ArticleIs a heuristic a solver?
Can we call a heuristic (especially a meta-heuristic) a solver? I am not so sure.Warning: this is somewhat of an opinionated rant. Many of you may not agree.The name "solver" seems to imply that the...
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4-color maps: another model
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