Dear Topologists,

Today in seminar we have Allison Moore speaking.

The zoom link is the same as usual:

Topic: Okstate Topology Seminar Time: This is a recurring meeting Meet anytime

Join Zoom Meeting https://zoom.us/j/94529451960?pwd=ekkxYUsrRGt5bVdEQWJRN0JOZ04wZz09

Meeting ID: 945 2945 1960 Passcode: JSJDecomp

Her title and abstract are here: Title: Conway spheres and immersed curves Speaker: Allison Moore, Virginia Commonwealth University Date: Nov 9, 2021 Time: 3:00 PM (4PM eastern) Room: Virtual Abstract: A tangle decomposition along a Conway sphere breaks a knot or link into simpler pieces, each of which is a two-string tangle. In this talk, we’ll discuss how Heegaard Floer and Khovanov homologies can be approached and calculated using tangle decompositions. In both cases, the algebraic invariants can be realized geometrically as immersed curves on the four-punctured sphere. This strategy turns out to be quite useful for studying L-space knots and investigating two classic open problems: the cosmetic surgery conjecture and the cosmetic crossing conjecture. This is joint with Kotelskiy, Lidman, Watson and Zibrowius.

______________________

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