-------- Original Message -------- Subject: [constraints] MIPLIB Call for Contributions Date: Tue, 14 Sep 2010 12:32:48 +0200 From: Chris Beck jcb@mie.utoronto.ca Reply-To: constraints@yahoogroups.com To: constraints@yahoogroups.com CC: Timo Berthold berthold@zib.de

Hi Everyone,

I am passing along this announcement about MIPLIB as they are actively seeking problem instances and there is a considerable overlap between problems in past versions of MIPLIB and those that have been studied (often in different formulations) in the constraint programming literature.

Chris

-------- Dear colleagues,

Since its first release in 1992, the MIPLIB has become a standard test set used to compare the performance of mixed integer linear optimization software and to evaluate the computational performance of newly developed algorithms and solution techniques.

Seven years have passed since the last update in 2003. Again, the progress in state-of-the-art optimizers, and improvements in computing machinery have made several instances too easy to be of further interest. New challenges need to be considered!

Last year a group of interested parties including participants from ASU, COIN, FICO, Gurobi, IBM, and MOSEK met at ZIB to discuss the guidelines for the 2010 release of the MIPLIB. It will be the fifth edition of the Mixed-Integer Programming LIBrary.

Therefore, we are looking for interesting and challenging (mixed-)integer linear problems from all fields of Operations Research and Combinatorial Optimization, ideally ones which have been built to model real life problems. We would be very happy if you contributed to this library by sending us hard and/or real life instances. By now, we are especially interested in benchmarking instances, i.e., problems that take between 15 minutes and two hours to solve.

Find the submission webpage at http://miplib.zib.de/miplib2010

The submission deadline will be the 1st October 2010. We are looking forward to your contributions.

Thanks and best regards, Timo Berthold on behalf of the MIPLIB committee (see webpage)