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math.CO2025
Nowhere-zero flow reconfiguration
Louis Esperet, Kevin Hendrey, Aurélie Lagoutte +3
We initiate the study of nowhere-zero flow reconfiguration. The natural question is whether any two nowhere-zero -flows of a given graph are connected by a sequence of nowhe…
math.CO2025
Small hitting sets for longest paths and cycles
Sergey Norin, Raphael Steiner, Stephan Thomassé +1
Motivated by an old question of Gallai (1966) on the intersection of longest paths in a graph and the well-known conjectures of Lovász (1969) and Thomassen (1978) on the maximum le…