Mixing Times of Markov Chains on Degree Constrained Orientations of Planar Graphs
Stefan Felsner,
Daniel Heldt
Abstract:We study Markov chains for α-orientations of plane graphs, these are orientations where the outdegree of each vertex is prescribed by the value of a given function α. The set of α-orientations of a plane graph has a natural distributive lattice structure. The moves of the up-down Markov chain on this distributive lattice corresponds to reversals of directed facial cycles in the α-orientation. We have a positive and several negative results regarding the mixing time of such Markov chains.A 2-orientation of a pl… Show more
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