Hello everyone,
Today we are happy to have Joan Licata. Her title, abstract and the zoom link can be found below.
Title: Diagrams for Three-Manifold Spines Speaker: Joan Licata, Australia National University/ICERM Date: Feb 22, 2022 Time: 3:00 PM Link: https://zoom.us/j/94529451960?pwd=ekkxYUsrRGt5bVdEQWJRN0JOZ04wZz09 Join our Cloud HD Video Meetinghttps://zoom.us/j/94529451960?pwd=ekkxYUsrRGt5bVdEQWJRN0JOZ04wZz09 Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webinars across mobile, desktop, and room systems. Zoom Rooms is the original software-based conference room solution used around the world in board, conference, huddle, and training rooms, as well as executive offices and classrooms. Founded in 2011, Zoom helps businesses and organizations bring their teams together in a frictionless environment to get more done. Zoom is a publicly traded company headquartered in San Jose, CA. zoom.us
Abstract: To study knots in R^3 , it’s natural to analyse the combinatorics of their projections to some plane. To generalise this to arbitrary three-manifolds, one can consider projections to spines, two-complexes which play an important role in computational topology. In addition to describing some results about spine projections of isotopic links, I’ll explain a connection to an open result about shadows of four-manifolds. The work I’ll describe is joint with Brand, Burton, Dancso, He, and Jackson.
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Neil R. Hoffman Assistant Professor Department of Mathematics 523 Math Science Building Oklahoma State University Stillwater, OK 74078-1058 405-744-7791 http://math.okstate.edu/people/nhoffman