Hello everyone,
Tomorrow, we have Danny Calegari joining us. His title and abstract are below. The zoom link for the seminar is below. Also, I will be in MSCS 445 and plan to have the talk projected there for those interesting in watching the talk with other people.
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
Homological stability of some big mapping class groups Speaker: Danny Calegari, University of Chicago Date: Sep 13, 2022 Time: 3:30 PM Room: Virtual meeting Abstract: Many surfaces of infinite type satisfy a kind of topological stability: the operation of boundary summing with certain surfaces of infinite type does not change their homeomorphism type. This phenomenon is often reflected in homological stability for mapping class groups, and gives techniques to help compute their homology. We illustrate this method with an example where it gives a complete answer: the homology of the mapping class group of the disk (resp. plane) minus a Cantor set is trivial (resp. is isomorphic to the homology of CP∞). This is joint work with Lvzhou Chen and Nathalie Wahl. This is a virtual talk. Contact Neil Hoffman for the zoom link
______________________
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
Also, the proposed dates for Redbud in the spring are:
March 31 - April 2nd April 7 - April 9 April 21 - 23
It will be held at OU. Does anyone have conflicts with any of those dates?
______________________
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
________________________________ From: Hoffman, Neil nhoffman@math.okstate.edu Sent: Monday, September 12, 2022 1:54 PM To: mdtop@mathdept.okstate.edu mdtop@mathdept.okstate.edu Subject: [Mdtop] Tomorrow in topology seminar
Hello everyone,
Tomorrow, we have Danny Calegari joining us. His title and abstract are below. The zoom link for the seminar is below. Also, I will be in MSCS 445 and plan to have the talk projected there for those interesting in watching the talk with other people.
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
Homological stability of some big mapping class groups Speaker: Danny Calegari, University of Chicago Date: Sep 13, 2022 Time: 3:30 PM Room: Virtual meeting Abstract: Many surfaces of infinite type satisfy a kind of topological stability: the operation of boundary summing with certain surfaces of infinite type does not change their homeomorphism type. This phenomenon is often reflected in homological stability for mapping class groups, and gives techniques to help compute their homology. We illustrate this method with an example where it gives a complete answer: the homology of the mapping class group of the disk (resp. plane) minus a Cantor set is trivial (resp. is isomorphic to the homology of CP∞). This is joint work with Lvzhou Chen and Nathalie Wahl. This is a virtual talk. Contact Neil Hoffman for the zoom link
______________________
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/nhoffmanhttps://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmath.okstate.edu%2Fpeople%2Fnhoffman&data=05%7C01%7Cneil.r.hoffman%40okstate.edu%7Ca485fb3606be481d7c3808da94f03ea8%7C2a69c91de8494e34a230cdf8b27e1964%7C0%7C0%7C637986056818653095%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Ixua9DdmiRn5bwfOTHaJJrk3TnzkB%2FOn9AlChDr%2F3Nw%3D&reserved=0
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Hoffman, Neil