October 30, 2024: We have an opening for a fully funded doctoral research opportunity (100% position – TVL E13) in the field of Bilevel, Robust, and Discrete Optimization. For more details please visit Doctoral Researcher in the Field of Bilevel, Robust, and Discrete Optimization (m/f/d).

October 8, 2024: Our paper on Coupling Constraints in Linear Bilevel Optimization (jointly with Dorothee Henke, Henri Lefebvre, and Martin Schmidt) has now been accepted for publication in Optimization Letters. The latest version of the preprint is available at Optimization Online.

September 5, 2024: Today, I gave a talk about BOBILib: Bilevel Optimization (Benchmark) Instance Library at the OR 2024, Munich, Germany.

July 26, 2024: Today, I gave a talk about Connections and Reformulations between Robust and Bilevel Optimization at the ISMP 2024, Montreal, Canada.

July 17, 2024: Our report on BOBILib: Bilevel Optimization (Benchmark) Instance Library (jointly with Thomas Kleinert, Ivana Ljubic, Ted Ralphs, and Martin Schmidt) is available at Optimization Online. In addition, you can find all instances and best known solutions at https://bobilib.org.

May 17 May, 2024: I am very thankful for the great opportunity to present our work Adjustable Robust Nonlinear Network Design under Demand Uncertainties at the Robust Optimization Webinar (ROW); available on YouTube.

May 13, 2024: It was a great pleasure to give my talk Adjustable Robust Network Design for Energy Networks at the Variational Analysis and Applications for Modeling of Energy Exchange – VAME 2024 at Trier.

April 10, 2024: Today, I gave a talk about Nonlinear Flows Meet Bilevel and Robust Optimization at the ERGO seminar in Edinburgh (United Kingdom).

April 2, 2024: Today, I gave a talk on Connections and Reformulations between Robust and Bilevel Optimization at the workshop Optimization at the second level held at CIRM, Marseille (France).

March 29, 2024: Our preprint on Adjustable Robust Nonlinear Network Design under Demand Uncertainties (jointly with Julia Grübel and Martin Schmidt) is now available at Optimization Online

Februar 19, 2024: Our preprint on On Coupling Constraints in Linear Bilevel Optimization (jointly with Dorothee Henke, Henri Lefebvre, and Martin Schmidt) can now be found here: Optimization Online, arXiv.

October 9, 2023: Our preprint on Using Column Generation in Column-and-Constraint Generation for Adjustable Robust Optimization (jointly with
Henri Lefebvre and Martin Schmidt) is now available at Optimization Online.

September 1, 2023: I feel very honored that I have received the GOR Young Researchers Award 2023 at the OR 2023 in Hamburg (Germany).

September 1, 2023: Today, I gave a talk on A Bilevel Optimization Approach to Decide the Feasibility of Bookings in the European Gas Market in the Award Competition session of the OR 2023 in Hamburg (Germany).

August 31, 2023: Today, I gave a talk on Robust Network Design for Nonlinear Flows at the OR 2023 in Hamburg (Germany).

August 18, 2023: Our preprint on Learning the Follower’s Objective Function in Sequential Bilevel Games (jointly with Ioana Molan and Martin Schmidt) is now available at Optimization Online.

August 9, 2023: Today, I gave a talk on An Exact Method for Nonlinear Network Flow Interdiction Problems at the International Conference on Bilevel Optimization in Southampton.

June 23, 2023: Our preprint on Connections and Reformulations between Robust and Bilevel Optimization (jointly with Marc Goerigk, Jannis Kurtz, and Martin Schmidt) is now available at Optimization Online, TRR154 Preprint Server.

June 1, 2023: Today, I gave a talk on An Exact Method for Nonlinear Network Flow Interdiction Problems at the SIAM Conference on Optimization in Seattle (USA).

May 3, 2023: Our paper On a Computationally Ill-Behaved Bilevel Problem with a Continuous and Nonconvex Lower Level jointly with Yasmine Beck, Daniel Bienstock, and Martin Schmidt has now been accepted for publication in Journal of Optimization Theory and Applications. The preprint is available at Optimization Online, TRR 154 Preprint Server.

January 9-13, 2023: I am very thankful that I was invited and that I could participate in the Aussois 25th Combinatorial Optimization Workshop (2023).

October 19, 2022: Our preprint on An Exact Method for Nonlinear Network Flow Interdiction Problems (jointly with Martin Schmidt) is now available at Optimization Online.

September 8, 2022: Today, I gave a talk on Global optimization for the multilevel European gas market system with nonlinear flow models on trees at the OR22 conference in Karlsruhe (Germany).

July 6, 2022: I feel very honored that I was nominated as one of the four finalist for EURO Doctoral Dissertation Award and could present the results of my thesis Feasibility for Maximal Uncertainty Sets in Robust Optimization with Application to Gas Networks at the EURO22 conference in Espoo (Finnland).

June 30, 2022: My paper Deciding the feasibility of a booking in the European gas market is coNP-hard has now been published in Annals of Operations Research (DOI: 10.1007/s10479-022-04732-1). It’s open access!

April 28, 2022: Today, I gave a talk on A bilevel optimization approach to decide the feasibility of bookings in the European gas market in the INFORMS/ENRE Online Scientific Event Series.

April 11, 2022: My paper on Deciding the Feasibility of a Booking in the European Gas Market is coNP-hard has now been accepted for publication in Annals of Operations Research. The preprints are still available online: Optimization Online, TRR 154 Preprint Server

March 14, 2022: I feel very honored that today we received the MMOR Best Paper Award 2021 for our paper A bilevel optimization approach to decide the feasibility of bookings in the European gas market in the journal Mathematical Methods of Operations Research. I thank the entire editorial board for this award. Moreover, I am extremely grateful to be able to work with such great co-authors Fränk Plein, Martine Labbé, and Martin Schmidt.

February 2, 2022: Our preprint On a Computationally Ill-Behaved Bilevel Problem with a Continuous and Nonconvex Lower Level jointly with Yasmine Beck, Daniel Bienstock, and Martin Schmidt is available at Optimization Online, TRR 154 Preprint Server

January 3, 2022: Our paper Global Optimization for the Multilevel European Gas Market System with Nonlinear Flow Models on Trees (jointly with Lars Schewe and Martin Schmidt) has now been published in Journal of Global Optimization (DOI: 10.1007/s10898-021-01099-8). It’s open access!

September 24, 2021: Our paper A Bilevel Optimization Approach to Decide the Feasibility of Bookings in the European Gas Market (jointly with Fränk Plein, Martine Labbé, and Martin Schmidt) has now been published in Mathematical Methods of Operations Research (DOI: 10.1007/s00186-021-00752-y). It’s open access!

March 10, 2021: Our paper Radius of Robust Feasibility for Mixed-Integer Problems (jointly with Frauke Liers and Lars Schewe) is now published in INFORMS Journal on Computing (DOI: 10.1287/ijoc.2020.1030). The preprint is available here: Optimization Online, TRR 154 Preprint Server.

January 5, 2021: Our paper Deciding Feasibility of a Booking in the European Gas Market on a Cycle is in P (jointly with Martine Labbé, Fränk Plein, and Martin Schmidt) is now published online in Networks (DOI: 10.1002/net.22003). It’s open access!

August 13, 2020: Our paper Computing technical capacities in the European entry-exit gas market is NP-hard (jointly with Lars Schewe and Martin Schmidt) is now published online in Annals of Operations Research (DOI: 10.1007/s10479-020-03725-2). It’s open access!

December 6, 2019: Our math & engineering collaboration paper Modeling Hydrogen Networks for Future Energy Systems: A Comparison of Linear and Nonlinear Approaches (jointly with Markus Reuß, Lara Welder, Jochen Linßen, Thomas Grube, Lars Schewe, Martin Schmidt, Detlef Stolten, and Martin Robinius) has now been published in International Journal of Hydrogen Energy (DOI: 10.1016/j.ijhydene.2019.10.080). The preprint can be downloaded here: engrXiv.

October 18, 2019: Our paper On Electricity Market Equilibria with Storages: Modeling, Uniqueness, and a Distributed ADMM (jointly with Julia Grübel, Thomas Kleinert, Vanessa Krebs, Galina Orlinskaya, Lars Schewe, and Martin Schmidt) is now published in Computers & Operations Research (DOI: 10.1016/j.cor.2019.104783). The preprints can be downloaded here: Optimization Online, TRR 154 Preprint Server.

July 12, 2019: Our paper Structural Properties of Feasible Bookings in the European Entry-Exit Gas Market System (jointly with Lars Schewe and Martin Schmidt) is now published in 4OR (DOI: 10.1007/s10288-019-00411-3). The preprint is available here: Optimization Online, TRR 154 Preprint Server.

May 26, 2019: Our math & engineering paper Robust Optimal Discrete Arc Sizing for Tree-Shaped Potential Networks (jointly with Martin Robinius, Lars Schewe, Martin Schmidt, Detlef Stolten, and Lara Welder) is now published in Computational Optimization and Applications (DOI: 10.1007/s10589-019-00085-x). The preprint is avalaible here: Optimization Online, TRR 154 Preprint Server.