Dual spanning trees in planar graphs, and "filling invariants" for finitely presented groups

Tim Riley (Bristol)

Wednesday 19th November, 2008 16:00-17:00 214


I will describe some work with W.P.Thurston on how duality conditions affect the existence of efficient spanning trees in planar graphs. I will explain how the topic came to my attention in the course of studying "filling invariants" for finitely presented groups.

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