We are working in Discrete Mathematics/Graph Theory with main focuses on matchings in graphs, edge-colorings and in particular colorings and flows on signed graphs. One of our current projects is 'Edge-chromatic critical graphs.' In the context of research projects on the digital transformation of the society, we are interested in the application of graph-theoretical methods in the analysis and design of small socio-technical systems.
Since 2016 we have been organising the annual Colloquium on Combinatorics (www.kolkom.de) in Paderborn together with Kai Uwe Schmidt.
The next Colloquium will take place in Paderborn on November 23/24, 2018.