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<export-example>
  <doc>
    <id>1080</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2008-08-05</completedDate>
    <publishedDate>2008-08-05</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">On the Effects of Minor Changes in Model Formulations</title>
    <abstract language="eng">Starting with the description of the Traveling Salesmen Problem formulation as given by van Vyve and Wolsey in the article Approximate extended formulations'', we investigate the effects of small variations onto the performance of contemporary mixed integer programming solvers. We will show that even minor changes in the formulation of the model can result in performance difference of more than a factor of 1000. As the results show it is not obvious which changes will result in performance improvements and which not.</abstract>
    <identifier type="serial">08-29</identifier>
    <identifier type="issn">1438-0064</identifier>
    <identifier type="opus3-id">1115</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-10808</identifier>
    <author>Tobias Achterberg</author>
    <submitter>unknown unknown</submitter>
    <author>Thorsten Koch</author>
    <author>Andreas Tuchscherer</author>
    <series>
      <title>ZIB-Report</title>
      <number>08-29</number>
    </series>
    <collection role="ddc" number="510">Mathematik</collection>
    <collection role="msc" number="90C10">Integer programming</collection>
    <collection role="msc" number="90C11">Mixed integer programming</collection>
    <collection role="institutes" number="optimization">Mathematical Optimization</collection>
    <collection role="persons" number="achterberg">Achterberg, Tobias</collection>
    <collection role="persons" number="koch">Koch, Thorsten</collection>
    <collection role="projects" number="MATHEON-B14:Comb-Log">MATHEON-B14:Comb-Log</collection>
    <collection role="institutes" number="aopt">Applied Optimization</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/1080/ZR_08_29.pdf</file>
    <file>https://opus4.kobv.de/opus4-zib/files/1080/ZR_08_29.ps</file>
  </doc>
</export-example>
