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Math Calendar

Upcoming Events

September 29, 2021 (Wednesday), 4:00 pm

Qualifying Examination

Minh Quan Hoang Vu
Email: minh.quan.h.vu@vanderbilt.edu

September 29, 2021 (Wednesday), 4:10 pm

Topology & Group Theory Seminar

Proper proximality for groups acting on trees

Srivatsav Kunnawalkam Elayavalli (Vanderbilt)
Topology & Group Theory Seminar page for Zoom meeting information

I will discuss joint work with Changying Ding, where we show that many groups acting on trees are properly proximal in the sense of Boutonnet-Ioana-Peterson

October 1, 2021 (Friday), 4:10 pm

Subfactor Seminar

Spin model subfactors

Michael Montgomery, Vanderbilt University

Complex Hadamard matrices generate a class of irreducible hyperfinite subfactors with integer Jones index coming from spin model commuting squares. I will prove a theorem that establishes a criterion implying that these subfactors have infinite depth. I then show that Paley type II and Petrescu’s continuous family of Hadamard matrices yield infinite depth subfactors. Furthermore, infinite depth subfactors are a generic feature of continuous families of complex Hadamard matrices. In this talk I will present an outline for the proof of these results.

October 6, 2021 (Wednesday), 4:10 pm

Computational Analysis Seminar

Title- TBD

Rocío Díaz Martín, Vanderbilt University
Computational Analysis Seminar page for Zoom meeting information

October 8, 2021 (Friday), 2:30 pm

PDE Seminar

PDE Seminar- Title- TBD

Elena Giorgi, Columbia University
PDE Seminar

October 13, 2021 (Wednesday), 4:10 pm

Computational Analysis Seminar

Title TBD

Ron Levie, University of Munich
Computational Analysis Seminar page for Zoom meeting information

October 13, 2021 (Wednesday), 4:10 pm

Topology & Group Theory Seminar

Growth Of Dehn Twist and Pseudo-Anosov Conjugacy Classes in Teichmüller Space

Jiawei Han (Vanderbilt)
Topology & Group Theory Seminar page for Zoom meeting information

Abstract: Athreya, Bufetov, Eskin and Mirzakhani have shown the number of mapping class group lattice points intersecting a closed ball of radius $R$ in Teichmüller space is asymptotic to $e^{hR}$, where $h$ is the dimension of the Teichmüller space. In contrast, we first show the number of Dehn twist lattice points intersecting a closed ball of radius $R$ is coarsely asymptotic to $e^{hR/2}$. Moreover, we show the number of all multi-twists lattice points intersecting a closed ball of radius $R$ grows coarsely at least at the rate of $R e^{hR/2}$. Furthermore, we show for any pseudo-Anosov mapping class $f$, there exists a power $n$, such that the number of lattice points of the $f^n$ conjugacy class intersecting a closed ball of radius $R$ is coarsely asymptotic to $e^{hR/2}$. Finally, we could discuss a few open questions and a conjecture. The main results in this talk are from author’s papers arXiv:2105.08624 and arXiv:2105.08640.

October 22, 2021 (Friday), 4:10 pm

Subfactor Seminar

Subfactor Seminar- Title- TBD

Dan-Virgil Voiculescu, UC Berkeley
Zoom ID 94393956397 Subfactor Seminar page for Zoom meeting information

October 22, 2021 (Friday), 4:10 pm

Topology & Group Theory Seminar

Title- TBD

Jiawei Han (Vanderbilt)
Topology & Group Theory Seminar page for Zoom meeting information

October 29, 2021 (Friday), 11:30 am

Subfactor Seminar

Subfactor Seminar-Title TBD

Mikael Rordam, University of Copenhagen
Zoom ID 94393956397 Subfactor Seminar page for Zoom meeting information

October 29, 2021 (Friday), 2:30 pm

PDE Seminar

PDE-Seminar- Title- TBD

Katrina Morgan, Northwestern University
PDE Seminar page for Zoom meeting information

November 3, 2021 (Wednesday), 4:10 pm

Computational Analysis Seminar

Title- TBD

Alex Cloninger, University of California – San Diego
Computational Analysis Seminar page for Zoom meeting information

November 5, 2021 (Friday), 4:10 pm

Subfactor Seminar

Subfactor Seminar- Title TBD

Changying Ding, Vanderbilt University
Zoom ID 94393956397 Subfactor Seminar page for Zoom meeting information

November 12, 2021 (Friday), 2:30 pm

PDE Seminar

PDE Seminar- Title- TBD

Federico Pasqualotto, Duke University
PDE Seminar

November 12, 2021 (Friday), 4:10 pm

Subfactor Seminar

Subfactor Seminar- Title TBD

Corey Jones, North Carolina State University
Zoom ID 94393956397 Subfactor Seminar page for Zoom meeting information

November 17, 2021 (Wednesday), 4:10 pm

Computational Analysis Seminar

Title- TBD

Yvonne Ou, University of Delaware
Computational Analysis Seminar page for Zoom meeting information

December 3, 2021 (Friday), 4:10 pm

Subfactor Seminar

Subfactor Seminar- Title TBD

James Tener, ANU Mathematical Sciences Institute
Zoom ID 94393956397 Subfactor Seminar page for Zoom meeting information