**Seminars and Colloquiums**

for the week of October 29, 2018

for the week of October 29, 2018

*SPEAKERS*

** Monday**

Nikolay Brodskiy, University of Tennessee

Tuesday

Yu-Ting Chen, University of Tennessee

Mat Langford, University of Tennessee

**Wednesday**

Shuler Hopkins and Jesse Sautel, University of Tennessee

Remus Nicoara, University of Tennessee

**Thursday**

Yu-Min Chung, University of North Carolina at Greensboro

Rick Schoen, University of California, Irvine

**Friday**

Athma Senthilnathan, University of Tennessee (EEB graduate student)

Russell Zaretski, University of Tennessee

Noah Giansiracusa, Swarthmore College

**TEA TIME**

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**

**TOPOLOGY/ GEOMETRY SEMINAR**

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**

**STOCHASTICS/PROBABILITY SEMINAR**

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.

**MINIMAL SURFACES SEMINAR
**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**

**ANALYSIS SEMINAR
**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.

**COLLOQUIUM
**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**

**MATHEMATICAL DATA SCIENCE SEMINAR
**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.

**GEOMETRIC ANALYSIS SEMINAR
**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**

**MATH BIOLOGY SEMINAR
**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

** ASA CHAPTER MEETING
**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.

**COLLOQUIUM
**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:**