Yet Another Math Programming Consultant

I am a full-time consultant and provide services related to the design, implementation and deployment of mathematical programming, optimization and data-science applications. I also teach courses and workshops. Usually I cannot blog about projects I am doing, but there are many technical notes I'd like to share. Not in the least so I have an easy way to search and find them again myself. You can reach me at erwin@amsterdamoptimization.com.

Tuesday, January 12, 2016

Matlab primal simplex solver

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I would guess there are problems where primal simplex is doing well. Apparently not enough of those.

Simulating a color-bar in Bokeh

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Bokeh does not (yet) have built-in support for color-bars. Below we simulate this by adding a figure below the scatter plot.   Interestin...
Tuesday, January 5, 2016

Book buyers price index

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We have the well-known CPI index, but may be we also need a separate index for people who buy books. Of course this also applies to journ...

GAMS to Python (2)

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A simple, convenient way to move model results from a GAMS model into Python for further postprocessing is via a SQLite database. This looks...
Sunday, January 3, 2016

A variant of the Lights Out game

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Suppose we have a grid like this, with some binary values turned on: This is our initial state s0 . The goal is to turn all lights off, bu...

Constraint Solving and Planning with Picat

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Interesting book about an interesting language . I once had a copy of Turbo Prolog; Picat looks and feels similar in many respects.
Saturday, January 2, 2016

Finding all optimal LP solutions using the Cplex Solution Pool

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In http://yetanothermathprogrammingconsultant.blogspot.com/2016/01/finding-all-optimal-lp-solutions.html a MIP formulation was presented to...
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Finding all optimal LP solutions

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I am regularly confronted with the question: My LP model has multiple optimal solutions. Can I retrieve all optimal LP solutions? Probably ...
Friday, January 1, 2016

Internet Explorer WebGL bug

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I was doing some experiments with a 2d scatter plot with more than 5k points (see http://yetanothermathprogrammingconsultant.blogspot.com/20...
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Erwin Kalvelagen
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