PhD Theses

PhD Theses treat usually complex mathematical optimization problems, for which there exist no satisfying solution methods so far. The problem results usually from concrete applications in industry and economy or from engineering and scientific questions. The main interest of our working group lies in optimization problems which contain combinatorial elements or decision-demanding questions, i.e. questions, which permit only yes/no answers. Mathematically, such questions can be formulated as mixed-integer linear or nonlinear problems (short MIP or MINLP). A thesis usually contains the setting of a suitable mathematical model, the analysis of the underlying MIPs and/or MINLPs, the development and extension of suitable solution procedures as well as the application on real and realistic data.

Current Works

  • Robustification of Physics Parameters in Gas Networks
    Denis Aßmann
  • Automotive Life Cycle Assessment
    Lucia Bäuml
  • Adaptive MIP-Relaxation for MINLP
    Robert Burlacu
  • Stochastic Optimization of Energy Systems
    Matej Ciesko
  • Exact solution approaches for binary quadratic optimization problems
    Lena Hupp
  • Robust Optimization in Air Traffic Management
    Manu Kapolke
  • Algorithmic Techniques For Solving Mixed-Integer Multilevel Models In Energy Market Design
    Thomas Kleinert
  • Optimization of Hybrid Energy Systems by Mixed Integer Programming Methods
    Katja Kutzer
  • Mixed Integer Nonlinear Programming for Network Design
    Maximilian Merkert
  • Tariff Optimization for Smart Grids
    Galina Orlinskaya
  • Robust Optimization in the context of Free-Flight
    Andrea Peter
  • Vehicle Scheduling in Rail Freight Service
    Hanno Schülldorf
  • Dekompositionsmethoden für ganzzahlig-kontinuierliche Optimalsteuerung
    Mathias Sirvent
  • Minimizing waiting times in patient transportations and rescue missions
    Sebastian Tschuppik

Previous Works

From 2004, 2005, 2006, 2007, 2008, 2010, 20112012, 2013, 2014, 2015, and 2016.


  • Habilitation Discrete methods for hard mixed-integer nonlinear problems
    Lars Schewe
  • Models and methods for determining maximal free capacities in gas networks
    Christine Hayn
  • Uncertainty Models for Optimal and Robust ATM Schedules
    Andreas Heidt
  • Mixed Integer Programming in Capacity Expansion Planning for Energy Systems
    Christoph Thurner
  • Mixed Integer Programming for the Design of Energy Markets
    Martin Weibelzahl
  • Mixed Integer Programming Techniques for solving Supply-Chain-Management Problems
    Dieter Weninger


  • Solving Network Design Problems via Decomposition, Aggregation and Approximation with an Application to the Optimal Expansion of Railway Infrastructure
    Andreas Bärmann
  • Lebenszyklusorientierte Optimierung für eine ressourcen- und energieeffiziente Infrastruktur, Trassierung von Rohrleitungen unter physikalischen Randbedingungen
    Jakob Schelbert
  • Binary Steiner Trees: Structural Results, Algorithms and an Application in Phylogeny
    Susanne Pape


  • Clearing Coupled Energy Markets
    Johannes Müller


  • Mixed-Integer Semidefinite Programming with an Application to Truss Topology Design
    Sonja Mars
  • Discrete-continuous optimization of complex dynamic water supply and urban drainage systems
    Antonio Morsi


  • Routing cars in rail freight service
    Henning Homfeld


  • Approximation of Nonlinear Dynamics in Gas Network Optimization
    Björn Geißler


  • Integral Sheet Metal Design by Discrete Optimizition
    Ute Günther
  • A Scenario Tree-Based Decomposition for Solving Multistage Stochastic Programs with Application in Energy Production
    Debora Mahlke
  • Designing Coupled Energy Carrier Networks by Mixed-Integer Programming Methods
    Andrea Zelmer


  • Protein Folding and Self-Avoiding Walks - Polyhedral Studies and Solutions
    Agnes Dittel


  • Relaxations and Solutions for the Minimum Graph Bisection Problem
    Marzena Fügenschuh


  • Optimal Distribution of Block-Structured Grids in Parallel Computing
    Daniel Junglas
  • A Mixed Integer Approach for the Transient Case of Gas Network Optimization
    Susanne Moritz


  • The Integrated Optimization of School Starting Times and Public Transport
    Armin Fügenschuh


  • Habilitation Counting principles of algebraic combinatorics : with an emphasis on topological enumeration.
    Michael Hofmeister
  • Mixed Integer Models for the Optimisation of Gas Networks in the Stationary Case
    Markus Möller
  • Mathematische Modellierung der Konsistenz und konsistenzerhaltender Erweiterungen von Vererbung in objektorientierten Sprachen
    Petra Kopp
  • Rapid Mathematical Programming
    Thorsten Koch