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dc.contributor.authorOstrowski, Jimen_US
dc.contributor.authorLinderoth, Jeffen_US
dc.contributor.authorRossi, Fabrizioen_US
dc.contributor.authorSmriglio, Stefanoen_US
dc.date.accessioned2012-03-15T17:24:31Z
dc.date.available2012-03-15T17:24:31Z
dc.date.created2009en_US
dc.date.issued2009en_US
dc.identifier.citationTR1663en_US
dc.identifier.urihttp://digital.library.wisc.edu/1793/60688
dc.description.abstractComputing the 1-width of the incidence matrix of a Steiner Triple System gives rise to small set covering instances that provide a computational challenge for integer programming techniques. One major source of difficulty for instances of this family is their highly symmetric structure, which impairs the performance of most branch-and-bound algorithms. The largest instance in the family that has been solved corresponds to a Steiner Tripe System of order 81. We present optimal solutions to the set covering problems associated with systems of orders 135 and 243. The solutions are obtained by a tailored implementation of constraint orbital branching, a method for branching on general disjunctions designed to exploit symmetry in integer programs.en_US
dc.format.mimetypeapplication/pdfen_US
dc.publisherUniversity of Wisconsin-Madison Department of Computer Sciencesen_US
dc.titleSolving Large Steiner Triple Covering Problemsen_US
dc.typeTechnical Reporten_US


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    Technical Reports Archive for the Department of Computer Sciences at the University of Wisconsin-Madison

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