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math.CO2026
A Gray code for arborescences of tournaments
Marthe Bonamy, Michael Hoffmann, Clément Legrand-Duchesne +1
We consider the following question of Knuth: given a directed graph and a root , can the arborescences of rooted in be listed such that any two consecutive arboresce…
math.CO2025
Crossing Number of 3-Plane Drawings
Miriam Goetze, Michael Hoffmann, Ignaz Rutter +1
We study 3-plane drawings, that is, drawings of graphs in which every edge has at most three crossings. We show how the recently developed Density Formula for topological drawings…