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Events by date

Friday, September 14, 2018

Friday, September 14, 2018 — 1:30 PM EDT

Tyrone Ghaswala, University of Manitoba

"Mapping class groups, coverings, braids and groupoids"

Given a finite-sheeted, possibly branched covering space between surfaces, it's natural to ask how the mapping class group of the covering surface relates to the mapping class group of the base surface. In this talk, we will take a journey through this question for surfaces with boundary. It will feature appearances from the fundamental groupoid, the Birman-Hilden theorem, the Burau representation and new embeddings of the braid group in mapping class groups.

Friday, September 14, 2018 — 3:00 PM EDT

Eli Shamovich, Department of Pure Mathematics, University of Waterloo

"Fixed points of self-maps of the free ball"

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