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Seminars and Colloquiums
for the week of March 27, 2017


SPEAKER:

Daniel Ramras, Indiana University-Purdue University, Monday
Delong Li, UTK, Monday
Eddie Tu, UTK, Tuesday
Andrew Starnes, UTK, Wednesday
Brian Allen, West Point Academy, New York, Thursday


TEA TIME -
3:00 pm – 3:30 pm
Monday - Wednesday: Ayres 401
Hosted by: TBA


Monday, March 27, 2017

TOPOLOGY/GEOMETRY SEMINAR
TITLE: Relative hyperbolicity and decomposition complexity of metric spaces
SPEAKER: Daniel Ramras, Indiana University-Purdue University
TIME: 2:30pm-3:20pm
ROOM: 113 Ayres
Abstract: I'll explain a general method for extending metric properties from peripheral subgroups of a relatively hyperbolic group to the entire group, following work of Osin, Dadarlat, and Guentner. As I'll explain, this method is applicable to several versions of decomposition complexity. This is joint work with Bobby Ramsey.

ALGEBRA SEMINAR
TITLE: Rings of Witt vectors
SPEAKER: Delong Li, UTK
TIME: 3:35pm-4:25pm
ROOM: 113 Ayres
Abstract: In this talk, we will construct the ring of Witt vectors and describe its main properties. Let p be a prime number. Let A be a commutative ring of characteristic p. Let m be a positive integer. Consider the set of m-tuples with components in A. We will define a new addition and multiplication on this set. This gives a ring, called the ring of Witt vectors of length m over A.


Tuesday, March 28, 2017

STOCHASTICS/ PROBABILITY SEMINAR
TITLE: Special dependence structures in Markov processes: Part II
SPEAKER: Eddie Tu, UTK
TIME: 2:10pm-3:25pm
ROOM: 113 Ayres
Abstract: Last week, we discussed various forms of dependence, such as association, supermodular dependence, and orthant dependence, and their characterizations for infinitely divisible distributions. This week, we will examine these different dependence structures in Feller Markov processes. These processes have behavior that is “locally infinitely divisible-like,” and arise as solutions to stochastic differential equations. We will go through a wide range of tools in analysis and probability, including pseudo-differential and integro-differential operators and small-time asymptotics, to help us characterize the dependence structures in these stochastic processes. Finally, we will show applications to stochastically monotone Feller Markov processes.


Wednesday, March 29, 2017

ANALYSIS SEMINAR
TITLE: Time-Changed Schramm-Loewner Evolution
SPEAKER: Andrew Starnes, UTK
TIME: 2:30pm – 3:20pm
ROOM: Ayres 113
Abstract: The Schramm-Loewner Evolution is a family of random curves generated by a constant times Brownian motion. For some constants the curves are simple a.s. and for others the curves are nonsimple a.s. In this talk, we will investigate what happens to the SLE hulls when we time-change Brownian motion by the inverse of an (a,k)-tempered stable subordinator.

This talk is based on joint work with David Horton, Kei Kobayashi, and Joan Lind.


Thursday, March 30, 2017

DIFFERENTIAL EQUATIONS SEMINAR
TITLE: Inverse Mean Curvature Flow and the Stability of the Positive Mass Theorem
SPEAKER: Brian Allen, West Point Academy, New York
TIME: 2pm – 3pm
ROOM: Ayres 113
Abstract: In 2001, Huisken and Ilmanen showed how to prove, among other things, the Positive Mass Theorem (PMT) for asymptotically flat manifolds using weak solutions to Inverse Mean Curvature Flow (IMCF). The rigidity statement was also proved but the stability statement was stated as a conjecture. Since then many people have worked on special cases of the stability of the PMT but the problem remains open. In this talk we will discuss work in progress with Christina Sormani on how we can use IMCF to address the problem of the stability of the PMT.


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 colloquium AT math DOT utk DOT edu


Past notices:

3_20_17.html

3/13/17 - Spring Break

3_6_17.html

2_27_17.html

2_20_17.html

2_13_17.html

2_6_17.html

1_30_17.html

1_23_17.html

1_16_17.html

Winter Break

11_28_16.html

11_21_16.html

11_14_16.html

11_7_16.html

10_31_16.html

10_24_16.html

10_17_16.html

10_10_16.html

10_3_16.html

9_26_16.html

9_19_16.html

9_12_15.html

spring_16.html

fall_15.html

 

last updated: March 2017

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