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Philipp Christophel

I work for SAS Institute Inc. as mixed-integer programming developer.

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  • Mainz, Germany
  • Member for 1 year, 4 months
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  • Last seen 23 hours ago

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13 How does a warm start work in LP/MIP? Aug 19 '19
11 What do solvers like Gurobi and CPLEX do when they run into hard instances of MIP? Sep 17 '19
11 Finding the linear functions defining a polyhedron through integer data? Oct 2 '19
11 Branching rules in commercial MIP solvers Jun 3 '19
10 Algorithms vs LP or MIP Aug 23 '19
7 Finding a solution to a linear program with a small number of zeros Nov 28 '19
5 Case Studies and Real Problems for Teaching Optimization and Modelling Sep 10 '19
4 How to read open-source code of a solver (Or-tools, OptaPlanner, Minotaur, etc.)? Sep 15
4 Negative reduced cost for basic variable Jan 30
3 How to use solvers with virtual machines? Aug 28
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