Department of Mathematics,
University of California San Diego
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Math 292 - Topology Seminar
Linh Truong
University of Michigan
The Upsilon invariant and fibered knots
Abstract:
In 2010, Hedden showed that the Ozsvath-Szabo concordance invariant tau detects whether a fibered knot induces a tight contact structure on the three-sphere. In 2017, Ozsvath, Stipsicz, and Szabo constructed a one-parameter family of concordance invariants Upsilon, which recovers tau as a special case. I will discuss a sufficient condition using Upsilon for the monodromy of the open book decomposition of a fibered knot to be right-veering. I will also discuss a generalization of a result of Baker on ribbon concordances between fibered knots. This is joint work with Dongtai He and Diana Hubbard.
Host: Jianfeng Lin
October 27, 2020
11:30 AM
Zoom information: Meeting ID: 933 6734 4286 Password: topology
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