Contact:

• eMail: gally [at] mathematik.tu-darmstadt.de
• Phone: +49 (0) 6151 16 23441
• Office: S4|10 130 (Dolivostraße)

Address:

TU Darmstadt
Fachbereich Mathematik, AG Optimierung
Dolivostraße 15, 64293 Darmstadt (Germany)

Research Interests:

• Mixed Integer Semidefinite Programming
• Truss Topology Design
• Compressed Sensing

Projects:

• Collaborative Research Centre SFB 805 – Control of uncertainty in load-carrying mechanical systems
  Subproject A4: Mathematical Models and Methods for Optimal Combinations of Passive and Active Components
• SCIP-SDP
  A SCIP-Package for solving mixed-integer semidefinite programs.

Talks:

• Warmstarts and other improvements in SCIP-SDP (slides) at the SCIP Workshop 2018, March 7, 2018, Aachen
• Applications and Solution Approaches for Mixed-Integer Semidefinite Programming (slides) at the MOSEK workshop on Mixed-integer conic optimization, January 11, 2018, Copenhagen
• SCIP-SDP: A Framework for Solving Mixed-Integer Semidefinite Programs at the 5th Alpen-Adria-Workshop on Optimization, December 8, 2017, Klagenfurt
• SCIP-SDP: A General-Purpose Solver for Mixed-Integer Semidefinite Programming at International Conference on Operations Research, September 7, 2017, Berlin
• SCIP-SDP: A Framework for Solving Mixed-Integer Semidefinite Programs at SIAM Conference on Optimization 2017, May 22, 2017, Vancouver
• Gemischt-Ganzzahlige Semidefinite Programmierung zur Robusten Topologieoptimierung von Stabwerken (in german) at the TOR Workshop "Operations Research in Engineering", March 28, 2017, Wenden
• SCIP-SDP: A Framework for Solving Mixed-Integer Semidefinite Programs (slides)
  at the 5th International Congress on Mathematical Software, July 12, 2016, Berlin
• Solving Mixed-Integer Semidefinite Programs for Robust Truss Topology Design
  at ISMP 2015, July 14, 2015, Pittsburgh
• Mixed integer semidefinite programming with SCIP (slides)
  at the SCIP Workshop 2014, October 2, 2014, Berlin

Publications:

• Tristan Gally, Marc E. Pfetsch, and Stefan Ulbrich: A Framework for Solving Mixed-Integer Semidefinite Programs, Optimization Methods and Software, 33(3) pp. 594--632, 2018. http://dx.doi.org/10.1080/10556788.2017.1322081
  The Preprint, an online supplement with detailed results and the corresponding instances are also available.
• Ambros Gleixner, Leon Eifler, Tristan Gally, Gerald Gamrath, Patrick Gemander, Robert Lion Gottwald, Gregor Hendel, Christopher Hojny, Thorsten Koch, Matthias Miltenberger, Benjamin Müller, Marc E. Pfetsch, Christian Puchert, Daniel Rehfeldt, Franziska Schlösser, Felipe Serrano, Yuji Shinano, Jan Merlin Viernickel, Stefan Vigerske, Dieter Weninger, Jonas T. Witt, and Jakob Witzig: The SCIP Optimization Suite 5.0, ZIB-Report 17-61, December 2017
• Stephen J. Maher, Tobias Fischer, Tristan Gally, Gerald Gamrath, Ambros Gleixner, Robert Lion Gottwald, Gregor Hendel, Thorsten Koch, Marco E. Lübbecke, Matthias Miltenberger, Benjamin Müller, Marc E. Pfetsch, Christian Puchert, Daniel Rehfeldt, Sebastian Schenker, Robert Schwarz, Felipe Serrano, Yuji Shinano, Dieter Weninger, Jonas T. Witt, and Jakob Witzig: The SCIP Optimization Suite 4.0, ZIB-Report 17-12, March 2017
• Tristan Gally and Marc E. Pfetsch: Computing Restricted Isometry Constants via Mixed-Integer Semidefinite Programming, Preprint: Optimization Online, April 2016
• Gerald Gamrath, Tobias Fischer, Tristan Gally, Ambros M. Gleixner, Gregor Hendel, Thorsten Koch, Stephen J. Maher, Matthias Miltenberger, Benjamin Müller, Marc E. Pfetsch, Christian Puchert, Daniel Rehfeldt, Sebastian Schenker, Robert Schwarz, Felipe Serrano, Yuji Shinano, Stefan Vigerske, Dieter Weninger, Michael Winkler, Jonas T. Witt, and Jakob Witzig: The SCIP Optimization Suite 3.2, ZIB-Report 15-60, February 2016
• Tristan Gally, Christopher M. Gehb, Philip Kolvenbach, Anja Kuttich, Marc E. Pfetsch, and Stefan Ulbrich: Robust Truss Topology Design with Beam Elements via Mixed Integer Nonlinear Semidefinite Programming, Applied Mechanics and Materials, 807 pp. 229-238, 2015