Mdtop October 2021

mdtop@mathdept.okstate.edu

1 participants
3 discussions

Today in Topology seminar
by Hoffman, Neil 26 Oct '21

26 Oct '21

Dear Topologists, Today we are very excited to have Adam Clay speaking with us. The seminar link is the same as last week (see below) and Adam's title and abstract are below. https://zoom.us/j/94529451960?pwd=ekkxYUsrRGt5bVdEQWJRN0JOZ04wZz09 Meeting ID: 945 2945 1960 Passcode: JSJDecomp Time: 3:00 PM (central) Title: Virtual Circular orderings, 3-manifolds and covering spaces Speaker: Adam Clay, University of Manitoba Host: Jonathan Johnson Abstract: The L-space conjecture states that for closed, orientable, irreducible 3-manifolds, the properties of being a Heegaard-Floer homology L-space, admitting a co-orientable taut foliation, and having a left-orderable fundamental group are equivalent. Motivated by the left-orderability aspect of this conjecture, I'll introduce circular orderings of groups, and introduce a "circular orderability version" of the L-space conjecture that brings covering spaces into the picture. I'll also discuss several new examples of fundamental groups of 3-manifolds that we know to be circularly orderable, ones that we know are not circularly orderable, and where to go from here. This talk represents joint work with Idrissa Ba. Best, Neil ______________________ 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

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Today in Topology
by Hoffman, Neil 19 Oct '21

19 Oct '21

Hello everyone, Today Anastasiia Tsvietkova is speaking in the topology seminar. Here title and abstract are below and the zoom link is at the bottom of this email: Title: Polynomially many genus g surfaces in a hyperbolic 3-manifold Speaker: Anastasiia Tsvietkova, Rutgers University, Newark Date: Oct 19, 2021 Time: 3:00 PM Room: Virtual meeting Abstract: We will discuss a universal upper bound for the number of non-isotopic genus g surfaces embedded in a hyperbolic 3-manifold, polynomial in hyperbolic volume. The surfaces are all closed essential surfaces, oriented and connected. This is joint work with Marc Lackenby 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 ______________________ 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

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Today in Topology Seminar
by Hoffman, Neil 12 Oct '21

12 Oct '21

Hello everyone, We have Topology seminar today at 3pm. Marissa Loving (Georgia Tech) will be speaking. Here title and abstract are below. Title: End-periodic homeomorphisms and volumes of mapping tori Speaker: Marissa Loving, Georgia Tech Date: Oct 12, 2021 Time: 3:00 PM Room: Virtual Abstract: I will discuss volumes of mapping tori associated to irreducible end-periodic homeomorphisms of certain infinite-type surfaces, inspired by a theorem of Brock (in the finite-type setting) relating the volume of a mapping torus to the translation distance of its monodromy on the pants graph. This talk represents joint work with Elizabeth Field, Heejoung Kim, and Chris Leininger. Join Zoom Meeting https://zoom.us/j/94529451960?pwd=ekkxYUsrRGt5bVdEQWJRN0JOZ04wZz09 Meeting ID: 945 2945 1960 Passcode: JSJDecomp ______________________ 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

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Mdtop October 2021