Timo Berthold
 Timo Berthold
Postal Address: Zuse Institute Berlin (ZIB)
Room 3107
Takustraße 7
14195 Berlin (Germany)
Phone: +49 30 84185-425
Fax: +49 30 84185-269
Email Address: berthold[at]zib.de

Projects

I am a member of the Matheon project B20 "Optimization of Gas Transport".
Mathematically, the combination of discrete decisions on the configuration of a gas transport network, the nonlinear equations describing the physics of gas, and the uncertainty in demand and supply yield large-scale and highly complex stochastic mixed-integer nonlinear programs. The goal of this project is to extend the framework SCIP for the solution of nonconvex mixed-integer nonlinear programs with chance constraints.

I am a member of the project "Linear, Integer, and Constraint Programming" at ZIB.
We develop, maintain, and provide the ZIB Optimization Suite which includes the modeling language ZIMPL, the simplex LP-solver SoPlex, and the branch-cut-and-price framework and constraint integer programming solver SCIP, integrating CP and MIP.

Further, I am an associated member of the IBM/ZIB Cooperation, the Siemens/ZIB Cooperation, and the Advanced Solver Technology for Supply Chain Management project, a cooperation with SAP.
I am one of the maintainers of the MIPLIB2010.

Until May 2009, I was a member of the Matheon project B12 "Symmetries in Integer Programming".
State-of-the-art IP-solving tools like SCIP rather suffer from the weak relaxations yielded by symmetric models than benefit from the additional structure those provide. In this project, we analyzed the polyhedral structures of symmetries and developed algorithms which handle both: exploring symmetry and breaking it.

Short Academic CV

10.2001–12.2006 TU Berlin Studies of Mathematics with minor Computer Science at the Technische Universität Berlin
09.2006 TU Berlin Diploma at TU Berlin, supervisor: Prof Dr. Dr. h.c. mult. Martin Grötschel
01.2005–01.2007 ZIB Student assistant at Zuse Institute Berlin
since 02.2007 ZIB Research assistant at Zuse Institute Berlin and
Matheon Member of the DFG Research Center Matheon "Mathematics for key technologies"
since 03.2007 BMS Member of the Berlin Mathematical School
11.2008 NICTA NICTA Visiting Researcher at the University of Melbourne
11.2009–02.2010 NICTA NICTA Visiting Researcher at the University of Melbourne
since 07.2010 Matheon Member of the Matheon council
05.2011 CPAIOR Conference Chair of the CPAIOR 2011

Publications

Bibtex file of my publications. DBLP list.

Academic Awards

03.2007 DMV Diploma Thesis Major Award of the German Mathematical Society (DMV)
09.2007 GOR Diploma Thesis Award of the German Operations Research Society (GOR)

Teaching

Winter 2007/08 TU Berlin Computational Mixed Integer Programming (ADM III) at the Technische Universität Berlin.
Together with Marco Lübbecke.

Selected Talks

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