Home /  Reading Group Big Mapping Class Groups: Large Scale geometry of big mapping class groups

Seminar

Reading Group Big Mapping Class Groups: Large Scale geometry of big mapping class groups March 19, 2026 (02:00 PM PDT - 03:00 PM PDT)
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Location: SLMath: Baker Board Room
Speaker(s) Yulan Qing (University of Tennessee)
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We construct a curve graph consisting of non-peripheral, simple closed curves for surfaces of infinite type. We show that it is connected and often hyperbolic. We use the non-peripheral curve graph to show that a large set of big mapping class groups have at most quadratic divergence. A section application is that we prove a large set of big mapping class groups have infinite coarse rank. This talk is basd on joint work with Kasra Rafi and Assaf Bar-Natan. 

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