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LP: the root node", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2023/04/a-large-mip-model-that-should-be-solved.html", "published_at": "2023-04-26T17:42:00+00:00" }, { "id": "01a0e28e-628d-70a3-9b3d-9cfc431723a9", "title": "Some GAMS embedded Python notes", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2023/04/some-gams-embedded-python-notes.html", "published_at": "2023-04-18T08:07:00+00:00" }, { "id": "01a0e28e-628d-70a3-9b3d-9cfc43b4570c", "title": "In-process, in-memory databases", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2023/04/in-process-in-memory-databases.html", "published_at": "2023-04-05T16:05:00+00:00" }, { "id": "01a0e28e-628d-70a3-9b3d-9cfc43f30ac1", "title": "Compression and large tables (Excel and CSV)", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2023/04/compression-and-large-tables-excel-and.html", "published_at": "2023-04-04T18:49:00+00:00" }, { "id": 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"01a0e297-ad20-7321-a39f-6763ed68d949", "title": "Networks not always need an extra source and sink node", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/12/networks-not-always-need-extra-source.html", "published_at": "2022-12-02T09:53:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763ee22b121", "title": "Cuckoo search is a bit cuckoo", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/11/cuckoo-search-is-bit-cuckoo.html", "published_at": "2022-11-28T19:23:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763eef6c88d", "title": "A strange series", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/11/a-strange-series.html", "published_at": "2022-11-22T09:48:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763ef7fb1b6", "title": "sum of K largest", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/11/sum-of-k-largest.html", "published_at": "2022-11-08T06:55:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f05592a9", "title": "Brian Kernighan talks about modeling languages", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/10/brian-kernighan-talks-about-modeling.html", "published_at": "2022-10-24T19:36:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f0a52562", "title": "Micro-econometrics: discrete choice models", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/10/micro-econometrics-discrete-choice.html", "published_at": "2022-10-20T04:32:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f10995a9", "title": "Select points", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/10/select-points.html", "published_at": "2022-10-03T09:49:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f1d0a27e", "title": "Some Matrix Balancing Experiments", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/08/some-matrix-balancing-experiments.html", "published_at": "2022-08-25T16:40:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f2068c13", "title": "Wordle: number of words from unique letters", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/08/wordle-number-of-words-from-unique.html", "published_at": "2022-08-23T13:34:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f2ef14c6", "title": "Primal, Dual and Equilibrium format of the Transportation Model", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/08/primal-dual-and-equilibrium-format-of.html", "published_at": "2022-08-16T13:57:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f2f03899", "title": "k out of n with smallest bandwidth", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/08/k-out-of-n-with-smallest-bandwidth.html", "published_at": "2022-08-13T23:02:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f308c5c2", "title": "Large sparse transportation model with CVXPY,CVXR", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/08/large-sparse-transportation-model-with.html", "published_at": "2022-08-10T16:15:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f3e1defb", "title": "Curl.exe", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/08/curlexe.html", "published_at": "2022-08-01T10:43:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f431125b", "title": "A model with semi-continuous variables", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/08/a-model-with-semi-continuous-variables.html", "published_at": "2022-08-01T09:38:00+00:00" }, { "id": "01a0e297-ad20-7321-a39f-6763f4fe11e1", "title": "The inverse of A(i,j) has signature B(j,i)", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/07/the-inverse-of-aij-has-signature-bji.html", "published_at": "2022-07-19T07:53:00+00:00" }, { "id": "01a0e2a8-65f5-72d7-bc5d-f99999ad617a", "title": "Linearize min(a,b)>min(x,y)", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/07/linearize-minabminxy.html", "published_at": "2022-07-12T10:15:00+00:00" }, { "id": "01a0e2a8-65f5-72d7-bc5d-f99999e39999", "title": "Transportation model with some non-existing links", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/07/transportation-model-with-some-non.html", "published_at": "2022-07-11T09:33:00+00:00" }, { "id": "01a0e2a8-65f5-72d7-bc5d-f9999aa5be7e", "title": "Artificially creating a large LP model: why is Cplex so efficient", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/07/artificially-creating-large-lp-model.html", "published_at": "2022-07-09T01:43:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb3529f442a7", "title": "XNOR as linear inequalities", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/06/xnor-as-linear-inequalities.html", "published_at": "2022-06-30T00:48:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352aa7581f", "title": "Goal Programming", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/06/goal-programming.html", "published_at": "2022-06-27T11:01:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352b808122", "title": "MAX-CUT", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/06/max-cut.html", "published_at": "2022-06-16T15:00:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352c6bf185", "title": "Maximizing Standard Deviation", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/06/maximizing-standard-deviation.html", "published_at": "2022-06-05T18:12:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352d6938db", "title": "A subset selection problem", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/06/a-subset-selection-problem.html", "published_at": "2022-06-02T15:41:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352e1326a1", "title": "Coding is to programming like typing is to writing", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/05/coding-is-to-programming-like-typing-is.html", "published_at": "2022-05-24T20:45:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352ef58fb0", "title": "Ranking using numpy.argsort", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/05/ranking-using-numpyargsort.html", "published_at": "2022-05-16T15:24:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352f097245", "title": "Evil Sudoku", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/05/evil-sudoku.html", "published_at": "2022-05-04T20:21:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352f8efaa5", "title": "Getting rid of non-linearities", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/05/mathjax.html", "published_at": "2022-05-01T17:48:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352fbabeb7", "title": "Inverting a large, dense matrix", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/04/inverting-large-dense-matrix.html", "published_at": "2022-04-28T10:32:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352fe73e41", "title": "Expanding Visual Studio in the Task Manager", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/04/expanding-visual-studio-in-task-manager.html", "published_at": "2022-04-16T22:03:00+00:00" }, { "id": "01a0e2a8-65f6-7189-af42-bb352ff0a2d6", "title": "GAMS: Undocumented PUT formats", "url": "https://yetanothermathprogrammingconsultant.blogspot.com/2022/04/gams-undocumented-put-formats.html", "published_at": "2022-04-14T06:41:00+00:00" } ] posts Claim your blog

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Yet Another Math Programming Consultant

yetanothermathprogrammingconsultant.blogspot.com

2026

minimum enclosing rectangle for k out of n points original ↗

26 Sept 2026

Mixture models as math programming problem original ↗

22 Jun 2026

MINLP instead of indicator constraints?original ↗

2 Jun 2026

Experiments with Hostile Brothers nonconvex NLP model original ↗

28 May 2026

Largest Empty Rotated Square: lots of trigonometry original ↗

16 May 2026

Largest empty shapes original ↗

12 May 2026

Convex hull models original ↗

30 Apr 2026

Minimum enclosing circle/ellipse 2 original ↗

25 Apr 2026

Minimum enclosing ellipse original ↗

8 Apr 2026

Revisiting a crazy global NLP problem original ↗

17 Mar 2026

2024

Non-convex Quadratic Integer Programming original ↗

22 Oct 2024

Equity in optimization models original ↗

17 Oct 2024

GAMS 48 tests original ↗

16 Oct 2024

Prevent Loops in GAMS original ↗

3 Oct 2024

CSV readers mutilating my data original ↗

29 Sept 2024

Solving DEA Models with GAMS original ↗

21 Sept 2024

Multiple Solutions in Minimum Spanning Tree example original ↗

4 Sept 2024

N-queens and solution pool original ↗

1 Sept 2024

Circle Packing and HTML reporting original ↗

28 Aug 2024

Revised Simplex LP Solver written in GAMS original ↗

12 Aug 2024

Practical Large-Scale Modeling: Sparsity original ↗

15 Jul 2024

Inflation is a difficult concept for many original ↗

30 Jun 2024

Another very small but very difficult global NLP model original ↗

16 May 2024

Modeling surprises original ↗

9 May 2024

Rounding inside an optimization model original ↗

6 May 2024

LP in statistics: The Dantzig Selector original ↗

15 Apr 2024

Instead of integers use binaries original ↗

12 Apr 2024

Water original ↗

28 Mar 2024

Math vs Programming original ↗

10 Feb 2024

Small non-convex MINLP: Pyomo vs GAMS original ↗

8 Feb 2024

One nonzero in set of free variables original ↗

30 Jan 2024

Informs Test of Time Award for CONOPT paper original ↗

16 Jan 2024

GAMS listing file: missing Unicode support original ↗

8 Jan 2024

String Art original ↗

4 Jan 2024

2023

Grouping items: a difficult combinatorial problem original ↗

20 Nov 2023

Scheduling Team Meetings original ↗

21 Oct 2023

GAMS: SMAX and sparsity original ↗

20 Oct 2023

Plotting NUTS-2 maps from GAMS original ↗

19 Oct 2023

Linear Programming Nonsense?original ↗

5 Oct 2023

Math and ChatGPT original ↗

28 Sept 2023

Julia vs Python original ↗

20 Sept 2023

Critiquing a GAMS Model original ↗

5 Sept 2023

Three-level Matrix Balancing original ↗

29 Aug 2023

Some TSP MTZ experiments original ↗

4 Aug 2023

Coloring edges of a grid original ↗

12 Jul 2023

A Julia thingy original ↗

6 Jul 2023

Some confusion here original ↗

2 Jul 2023

CVXPY DCP errors original ↗

27 Jun 2023

Generate all solutions that sum up to one original ↗

10 May 2023

Finding common patterns original ↗

7 May 2023

Solving as network with lowerbounds original ↗

2 May 2023

A large MIP model that should be solved as LP: the root node original ↗

26 Apr 2023

Some GAMS embedded Python notes original ↗

18 Apr 2023

In-process, in-memory databases original ↗

5 Apr 2023

Compression and large tables (Excel and CSV)original ↗

4 Apr 2023

Simultaneous equation models and data errors original ↗

25 Mar 2023

Algorithm vs. model original ↗

17 Mar 2023

Choosing between NLP solvers: interior point or active set.original ↗

14 Mar 2023

Some approaches for moving data between MS Access and GAMS original ↗

6 Mar 2023

Another fast MIP model: covering original ↗

24 Feb 2023

Assigning jobs to machines without overlap original ↗

16 Feb 2023

Supplier selection: an easy MIP original ↗

15 Feb 2023

Populating SQLite databases original ↗

13 Feb 2023

Tiny non-convex quadratic model brings solvers to their knees original ↗

29 Jan 2023

Export GAMS GDX file to different Python formats (CSV,Feather,Pickle)original ↗

24 Jan 2023

MIP Bounds original ↗

11 Jan 2023

High Level MIP Modeling original ↗

2 Jan 2023

2022

Not bad for a MIP...original ↗

27 Dec 2022

Maximum number of points with minimum distance original ↗

26 Dec 2022

Comparing matrix balancing objectives original ↗

17 Dec 2022

Networks not always need an extra source and sink node original ↗

2 Dec 2022

Cuckoo search is a bit cuckoo original ↗

28 Nov 2022

A strange series original ↗

22 Nov 2022

sum of K largest original ↗

8 Nov 2022

Brian Kernighan talks about modeling languages original ↗

24 Oct 2022

Micro-econometrics: discrete choice models original ↗

20 Oct 2022

Select points original ↗

3 Oct 2022

Some Matrix Balancing Experiments original ↗

25 Aug 2022

Wordle: number of words from unique letters original ↗

23 Aug 2022

Primal, Dual and Equilibrium format of the Transportation Model original ↗

16 Aug 2022

k out of n with smallest bandwidth original ↗

13 Aug 2022

Large sparse transportation model with CVXPY,CVXR original ↗

10 Aug 2022

Curl.exe original ↗

1 Aug 2022

A model with semi-continuous variables original ↗

1 Aug 2022

The inverse of A(i,j) has signature B(j,i)original ↗

19 Jul 2022

Linearize min(a,b)>min(x,y)original ↗

12 Jul 2022

Transportation model with some non-existing links original ↗

11 Jul 2022

Artificially creating a large LP model: why is Cplex so efficient original ↗

9 Jul 2022

XNOR as linear inequalities original ↗

30 Jun 2022

Goal Programming original ↗

27 Jun 2022

MAX-CUT original ↗

16 Jun 2022

Maximizing Standard Deviation original ↗

5 Jun 2022

A subset selection problem original ↗

2 Jun 2022

Coding is to programming like typing is to writing original ↗

24 May 2022

Ranking using numpy.argsort original ↗

16 May 2022

Evil Sudoku original ↗

4 May 2022

Getting rid of non-linearities original ↗

1 May 2022

Inverting a large, dense matrix original ↗

28 Apr 2022

Expanding Visual Studio in the Task Manager original ↗

16 Apr 2022

GAMS: Undocumented PUT formats original ↗

14 Apr 2022