Stefan Felsner

Stefan Felsner is a Professor at the Institut für Mathematik of Technische Universität Berlin, specializing in Algorithmic and Discrete Mathematics. His work focuses on Graph Theory, Combinatorics, Discrete Geometry, and Order Theory. He leads the Discrete Mathematics Group and has been involved in DFG-funded projects on geometric representations of graphs, arrangements, and order geometry.

Education & Career: Studied Mathematics at the University of Vienna. Worked as a research assistant at TU Berlin (1988–1993), then at Freie Universität Berlin (1993–2003) before becoming a Professor at TU Berlin in 2003. He earned his Habilitation in 1997 and has held visiting positions in the U.S. and Canada.

Research Interests: Graph drawing, geometric graphs, arrangements of lines/pseudolines, order dimension, and combinatorial structures. He authored the book Geometric Graphs and Arrangements and contributes to editorial boards of ORDER and DMTCS.

Recent Work: Focuses on contact representations of planar graphs, pseudocircle arrangements, and flip graph connectivity. His recent articles address convex drawings, Hamiltonian cycles in convex graphs, and counting pseudoline arrangements. He actively participates in the Mittagsseminar for discrete mathematics discussions.