Description:
Research, teaching & application of operations research.
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Strong Validity Table in PORTA
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Hello Everyone, I just started using PORTA (polyhedral representation transformation algorithm). When one uses the traf function with the -v option PORTA prints out a so-called strong validity table. The man pages does not have much information about this table. Does anyone know what this table means?... more »
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Column generation and analysis of the model
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Hello, I have an LP problem which is solved using the column generation method. This results in the optimal master problem (RMP): min F(x) s.t. A x >= b and the corresponding objective value. Assume that the objective value is, say, 1 while the ultimate goal is to get it down to, say, 0. I'm interested in *minimal* sets of constraints (linear inequalities)... more »
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Pairing Problem
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I have the following assignment problem for which i have already formulated an integer linear program. I was wondering if there is a known algorithm for solving the problem. A reduced version of the problem is as follows: I have six balls {s1,s2,s3........s6} and three boxes{Box1,Box2,Box3}. I have to assign a box to each ball. for example (s1,s3) ---> Box 2,... more »
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Call For Participation: WORLDCOMP'09 (joint conferences in comp. sci., comp. eng., and applied computing), USA, July 13-16, 2009
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Call For Participation WORLDCOMP'09 The 2009 World Congress in Computer Science, Computer Engineering, and Applied Computing Date and Location: July 13-16, 2009, Las Vegas, USA [link]... more »
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Meeting deadlines and breaking simmetry
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I've got the following problem: optimize the scheduling of workers inside a few building sites. There are different objectives, the first being the global amount of work done, expressed as the sum of advancement inside each site. Advancements are expressed as the ratio between the work done and the expected amount of workload.... more »
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Science FICTION!!!!!!!!!!
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Rocking News about Science and Technology log on this web page... ****************************** ****** [link] ****************************** ****** Telecommunication is a critical part of infrastructure and one that is becoming important, given the trend of globalisation and the shift to... more »
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Linear Optimization (Standard) Files
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The data associated with linear programming is stored and transported electronically in files. For professionals handling these materials, e.g. analysts and programmers, it can be very helpful to deal with standard file structures, as proposed here: [link] To test particular algorithms, I need some real-life linear... more »
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More that 2800 solutions manuals (PART 3)
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List of Solutions Manual _________________________ contact me to : mattos...@gmail.com mattosbw1(at) gmail.com ot to : newbergh...@yahoo.com newbergh123(at) yahoo.com .... try with both emails . NOTE : "THIS SERVICE IS NOT AVAILABLE FOR : CHINA, INDIA, PAKISTAN,... more »
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More that 2800 solutions manuals (PART 2)
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List of Solutions Manual _________________________ contact me to : mattos...@gmail.com mattosbw1(at) gmail.com ot to : newbergh...@yahoo.com newbergh123(at) yahoo.com .... try with both emails . NOTE : "THIS SERVICE IS NOT AVAILABLE FOR : CHINA, INDIA, PAKISTAN,... more »
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More that 2800 solutions manuals (PART 1)
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List of Solutions Manual _________________________ contact me to : mattos...@gmail.com mattosbw1(at) gmail.com ot to : newbergh...@yahoo.com newbergh123(at) yahoo.com .... try with both emails . NOTE : "THIS SERVICE IS NOT AVAILABLE FOR : CHINA, INDIA, PAKISTAN,... more »
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