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Seminars and Colloquiums
for the week of October 29, 2018


Nikolay Brodskiy, University of Tennessee

Yu-Ting Chen, University of Tennessee
Mat Langford, University of Tennessee
Shuler Hopkins and Jesse Sautel, University of Tennessee
Remus Nicoara, University of Tennessee
Yu-Min Chung, University of North Carolina at Greensboro
Rick Schoen, University of California, Irvine
Athma Senthilnathan, University of Tennessee (EEB graduate student)
Russell Zaretski, University of Tennessee
Noah Giansiracusa, Swarthmore College

3:00 PM – 3:30 PM
Monday, Tuesday, & Wednesday
Room: Ayres 401 (Monday and Tuesday), Ayres 404 (Wednesday)
Hosted by: Lindsay Grinstead, Jeremiah Smith, & Lee Spence

Monday, 10/29

TITLE: Dimension of tree-graded spaces III
SPEAKER: Nikolay Brodskiy, University of Tennessee
TIME: 3:35 PM-4:25 PM
ROOM: Ayres 406
The concept of tree-graded space was introduced by C. Drutu and M. Sapir when they proved (jointly with D. Osin) that a finitely generated group G is relatively hyperbolic with respect to finitely generated subgroups H1, . . . , Hn if and only if every asymptotic cone of G is tree-graded with respect to the limits of sequences of cosets of the subgroups Hi. We will explore how various dimension-like properties of a tree-graded space can be derived from the corresponding properties of the building pieces of the space. This talk is based on a joint work with A. Karassev.

Tuesday, 10/30

TITLE: Gaussian fluctuations in the KPZ equation.
SPEAKER: Yu-Ting Chen, University of Tennessee
TIME: 2:10 PM-3:10 PM
ROOM: Ayres 113
I will introduce the anisotropic class of the KPZ equation in (2+1)d. In contrast to the case of one spatial dimension, Gaussian fluctuations are physically expected. To give an example, I will discuss some scaling limits for the Whittaker driven particle system, which is believed to be a discrete model belonging to the class.

TITLE: Paper I, Sections II.2-II.3
SPEAKER: Mat Langford (University of Tennessee) and Giuseppe Tinaglia (King’s College London)
TIME: 4:00 PM-5:30 PM
ROOM: Ayres 121
Mat will first prove a gradient estimate for multi-valued minimal graphs which is used to show that the separation between the sheets of certain minimal graphs grows sublinearly. Giuseppe will afterwards show how one can extend a multi-valued graph in stable minimal disks.

Wednesday, 10/31

TITLE: An isolation result for Fourier matrices
SPEAKER: Shuler Hopkins and Jesse Sautel, University of Tennessee
TIME: 2:30 PM-3:20 PM
ROOM: Ayres 113
We present a theorem of Petrescu, stating that Fourier matrices of prime orders are isolated among all normalized complex Hadamard matrices.

TITLE: Subfactors and their symmetries
SPEAKER: Remus Nicoara, University of Tennessee
TIME: 3:30 PM-4:30 PM
ROOM: Ayres 405
The theory of subfactors was initiated by V. Jones in the eighties, as a Galois theory for inclusions of von Neumann algebras. Subfactors can be used to capture the symmetries of various mathematical and physical objects. We present several results dealing with the classification and construction of subfactors, with applications to Hadamard matrices, Hopf algebras, discrete groups and quantum information theory.

Thursday, 11/1

TITLE: Computational topology with applications in the natural sciences 
SPEAKER: Yu-Min Chung, University of North Carolina at Greensboro
TIME: 2:10 PM-3:10 PM
ROOM: Ayres 405
Computational topology is a relatively young field in algebraic topology. Tools from computational topology have proven successful in many scientific disciplines, such as fluid dynamics, biology, material science, climatology, etc. In this talk, we will give a brief introduction to computational topology, focusing primarily on persistent homology. Applications to various datasets from cell biology, biomedical engineering, and climatology will be presented to illustrate the methods.  

TITLE: Scalar Curvature and Minimal Hypersurface Singularities
SPEAKER: Rick Schoen, University of California, Irvine
TIME: 4:00 PM-5:00 PM
ROOM: Ayres 121
We will describe the minimal hypersurface approach to scalar curvature problems and explain the difficulty that singularities present in high dimensions. We will then describe our approach to handling them for certain questions such as the positive mass theorem.

Friday, 11/2

TITLE: Eco-evolutionary dynamics of intraspecific variation
SPEAKER: Athma Senthilnathan, University of Tennessee (EEB graduate student)
TIME: 10:10 AM-11:00 AM
ROOM: Ayres 401

SPEAKER: Russell Zaretski, University of Tennessee
TIME: 12:20 PM-1:20 PM
ROOM: Ayres 405
Dr. Zaretzki will discuss a variety of career opportunities in statistics, analytics, data science, and data engineering and help distinguish distinct elements of these related fields. He will also review differences between academia, industry, and government jobs and suggest some steps to take to prepare yourself for a career in one of these areas through education and training opportunities. Time permitting, we may also discuss some elements of professionalism that can help you succeed and move up after starting your career.   

Bio: Dr. Russell Zaretzki received his PhD in statistics from Cornell University in 2004.  He has been at UT since then and currently serves as executive committee chair of the Intercollegiate Graduate Statistics and Data Science Program as well as being the graduate director of the Data Science and Engineering program in the Bredesen Center for Interdisciplinary Research and Graduate Education. 

TITLE: Perspectives on the scalar curvature
SPEAKER: Rick Schoen, University of California, Irvine
TIME: 3:35 PM-4:35 PM
ROOM: Ayres 405
This will be a general talk concerning the role that the scalar curvature plays in Riemannian geometry and general relativity. We will describe recent work on extending the known results to all dimensions, and other issues which are being actively studied.

If you are interested in giving or arranging a talk for one of our seminars or colloquiums, please review our calendar.

If you have questions, or a date you would like to confirm, please contact mlangfo5 AT utk DOT edu

Past notices:

Oct. 22, 2018

Oct. 15, 2018

Oct. 8, 2018

Oct. 1, 2018

Sept. 24, 2018

Sept. 17, 2018

Sept. 10, 2018

Sept. 3, 2018

Aug. 27, 2018



last updated: November 2018

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