Automorphisms of the loop and arc graph of an infinite-type surface
Anschel Schaffer-Cohen (University of Pennsylvania)
Abstract: We show that the extended based mapping class group of an infinite-type surface is naturally isomorphic to the automorphism group of the loop graph of that surface. Additionally, we show that the extended mapping class group stabilizing a finite set of punctures is isomorphic to the arc graph relative to that finite set of punctures. This extends a known result for sufficiently complex finite-type surfaces, and provides a new angle from which to study the mapping class groups of infinite-type surfaces.
computational geometrydiscrete mathematicscommutative algebracombinatorics
Audience: researchers in the topic
Copenhagen-Jerusalem Combinatorics Seminar
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Organizers: | Karim Adiprasito, Arina Voorhaar* |
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