Hello everyone,

Today in topology I will be speaking. My title and abstract are below followed by the zoom link:

Title: Bounds for arithmetic invariants of 3-manifolds Speaker: Neil Hoffman, Oklahoma State University Date: Sep 7, 2021 Time: 3:00 PM Room: Virtual meeting Abstract: A hyperbolic 3-manifold is the quotient of $H^3$ by $\Gamma$ a discrete subgroup of $PSL(2, C)$. In fact, this subgroup $\Gamma$ carries a substantial amount of arithmetic information. I will discuss some of the background for defining a hyperbolic 3-manifold this way and show how this leads to upper bounds on the degrees of fields used define this data. Finally, I will describe how this perspective fits into joint work with K. Petersen.

Neil Hoffman is inviting you to a scheduled Zoom meeting.

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

Join by Skype for Business https://zoom.us/skype/94529451960

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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