Sunday, February 26, 2012

Symmetry

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From http://groups.google.com/group/ampl/browse_thread/thread/7c849e1de871b22b : Dear all, I would like to ...
Wednesday, February 22, 2012

Interesting Methodology Paper

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  http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1850704 False-Positive Psychology: Undisclosed Flexibility in Data Collection and A...
Tuesday, February 21, 2012

max tricks

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The following condition can be easily written as   However when we have:   then we need more sophistication. Something like:...
Monday, February 20, 2012

How to import big GAMS result data into SQL Server

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Recently I was involved a few models where GAMS was generating a lot of results, exceeding what we could easily store in Excel or Access. He...
Sunday, February 12, 2012

Weddings and optimal seating

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In http://www.improbable.com/2012/02/12/finding-an-optimal-seating-chart-for-a-wedding/ an interesting model is proposed about optimal seat...
2 comments:
Thursday, February 9, 2012

xor

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It is not often that I can use a XOR in a GAMS model. But here we are.. I am working on some tools for a randomized algorithm for a multi-...
Wednesday, February 8, 2012

Difference between parameters and variables

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Hi ampl users, I got a new question. Since AMPL does not allow command like "if.... then......
1 comment:
Monday, January 30, 2012

Formal proof?

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Is there an easy formal proof for this: http://yetanothermathprogrammingconsultant.blogspot.com/2011/10/special-case-of-integer-cuts.html ? ...
2 comments:
Monday, January 23, 2012

Comparing some modeling languages

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Not an easy task, as can be seen here: http://lists.gnu.org/archive/html/help-glpk/2012-01/msg00033.html To really appreciate the featur...
2 comments:
Saturday, January 21, 2012

network

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I have a question: In GAMS, is there something similar to "structure" in C ? I need to define a network optimization prob...