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Upcoming Seminars

Upcoming Colloquia

Microlocal codimension-three conjecture

September 25, 2018 - 3:35pm - Vincent Hall 16
Kari Vilonen
Abstract: Special functions (or distributions) can be understood and analyzed in terms of the systems of differential equations they satisfy. To this end, a general theory of systems of linear (micro) differential equations was developed by the Sato school in Kyoto. This point of view, in its various incarnations, is now ubiquitous in many parts of mathematics. For example, in the geometric Langlands program and representation theory it allows us to replace functions and group representations by geometric objects, perverse sheaves or D-modules. It has been well-known for a long time that the description of these objects gains more symmetry when one passes to the cotangent bundle. We explain the shape of the general microlocal structure of these objects and discuss, in particular, the role played by the codimension-three conjecture which was proved by Masaki Kashiwara and the speaker a few years ago.

Propagation of bistable fronts through a perforated wall

October 4, 2018 - 3:35pm - Vincent Hall 16
Hiroshi Matano
Abstract: We consider a bistable reaction-diffusion equation on ${\bf R}^N$ in the presence of an obstacle $K$, which is a wall of infinite span with periodically arrayed holes. More precisely, $K$ is a closed subset of ${\bf R}^N$ with smooth boundary such that its projection onto the $x_1$-axis is bounded, while it is periodic in the rest of variables $(x_2,\ldots, x_N)$. We assume that ${\bf R}^N \setminus K$ is connected. Our goal is to study what happens when a planar traveling front coming from $x_1 = +\infty$ meets the wall $K$.
We first show that there is clear dichotomy between `propagation' and `blocking'. In other words, the traveling front either completely penetrates through the wall or is totally blocked, and that there is no intermediate behavior. This dichotomy result will be proved by what we call a De Giorgi type lemma for an elliptic equation on ${\bf R}^N$. Then we will discuss sufficient conditions for blocking, and those for propagation. This is joint work with Henri Berestycki and Francois Hamel.
Mon Sep 24

IMA Data Science Lab Seminar

1:25pm - Lind 305
Genetics of mRNA and Protein Expression in Large Yeast Populations
Frank Albert, University of Minnesota, Twin Cities

Mon Sep 24

Dynamical Systems

2:30pm - Vinent Hall 570
Water transport in models of dryland vegetation patterns
Punit Gandhi, MBI, Ohio-State University

Mon Sep 24

Automorphic Forms and Number Theory

3:35pm - Vincent Hall 1
Lax-Phillips estimates [cont'd]
Paul Garrett

Tue Sep 25

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Tue Sep 25

Colloquium

3:35pm - Vincent Hall 16
Microlocal codimension-three conjecture
Kari Vilonen, University of Melbourne, Ordway Visitor

Thu Sep 27

Differential Geometry and Symplectic Topology Seminar

1:25pm - Vincent Hall 570
Second variation of Perelman's entropy and stability of Ricci solitons
Huaidong Cao, Ordway Visitor, Lehigh University

Thu Sep 27

Ordway Lecture Series

3:35pm - Vincent Hall 16
Microlocal codimension-three conjecture
Kari Vilonen, University of Melbourne, Ordway Visitor

Thu Sep 27

Analysis and PDE Working Seminar

3:40pm - Ford Hall 155
Mean Field Games
Sam Stewart

Fri Sep 28

IMA/MCIM Industrial Problems Seminar

1:25pm - Lind 305
If a tree falls in the woods and nobody hears, does it make a sound? (Or, making sure your code runs anywhere.)
Tyler Whitehouse, Gigantum

Fri Sep 28

Probability Seminar

2:30pm - Vincent Hall 209
Stationary coalescing walks on the lattice
Arjun Krishnan, University of Rochester

Fri Sep 28

Combinatorics Seminar

3:35pm - Vincent Hall 570
Pattern inventory polynomials for consonances and dissonances
Octavio Agustín-Aquino, Universidad Tecnológica de la Mixteca

Mon Oct 01

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Tyler Whitehouse, Gigantum

Tue Oct 02

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Tue Oct 02

Ordway Lecture Series

2:30pm - Vincent Hall 16
Microlocal codimension-three conjecture
Kari Vilonen, University of Melbourne, Ordway Visitor

Thu Oct 04

Colloquium

3:35pm - Vincent Hall 16
Propagation of bistable fronts through a perforated wall
Hiroshi Matano, Meiji University, Tokyo, Ordway Visitor

Fri Oct 05

Combinatorics Seminar

3:35pm - Vincent Hall 570
The Rogers-Ramanujan identities- a historical view
Dennis Stanton, UMN

Fri Oct 05

MCFAM Seminar

5:30pm - Vincent Hall 16
CCAR and Risk Modeling
Dr. Xu Li

Mon Oct 08

IMA Data Science Lab Seminar

1:25pm - Lind 305
A PDE Approach to a Prediction Problem Involving Randomized Strategies
Nadejda Drenska, University of Minnesota, Twin Cities

Mon Oct 08

Topology Seminar

3:30pm - Vincent Hall 301
Topology Seminar: TBA
Paul van Koughnett, Purdue

Tue Oct 09

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Wed Oct 10

PDE Seminar

3:35pm - Vincent Hall 570
Soliton resolution for the critical nonlinear heat equation
Hiroshi Matano, Meiji University

Fri Oct 12

IMA/MCIM Industrial Problems Seminar

1:25pm - Lind 305
Lecture
Jennifer Schumacher, 3M

Fri Oct 12

Combinatorics Seminar

3:35pm - Vincent Hall 570
Basis shape loci and the positive Grassmannian
Cameron Marcott, University of Waterloo

Mon Oct 15

IMA Data Science Lab Seminar

1:25pm - Keller 3-180
Lecture
Raj Nadakuditi, University of Michigan

Mon Oct 15

Topology Seminar

3:30pm - Vincent Hall 301
Topology Seminar: TBA
Wouter van Limbeek, UIC

Tue Oct 16

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Fri Oct 19

Combinatorics Seminar

3:35pm - Vincent Hall 570
Optimal switching sequence for switched linear systems
Qie He, UMN

Mon Oct 22

IMA Data Science Lab Seminar

1:25pm - Lind 409
Large Sample Asymptotics of Graph-based Methods in Machine Learning: Mathematical Analysis and Implications
Nicolas Garcia-Trillos, University of Wisconsin, Madison

Tue Oct 23

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Thu Oct 25

Algebraic Geometry

1:25pm - Vincent Hall 313
An example of liftings with different Hodge numbers
Shizhang Li, Columbia University

Fri Oct 26

Algebraic Geometry

3:35pm - Vincent Hall 313
On rigid varieties with projective reduction
Shizhang Li, Columbia University

Fri Oct 26

MCFAM Seminar

5:30pm - Vincent Hall 16
MCFAM Seminar
Dr. Katy Micek, 3M Finance

Mon Oct 29

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Pratik Chaudhari, University of California, Los Angeles

Mon Oct 29

Topology Seminar

3:30pm - Vincent Hall 301
Topology Seminar: TBA
Amit Sharma, Kent State University

Tue Oct 30

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Fri Nov 02

IMA/MCIM Industrial Problems Seminar

1:25pm - Lind 409
Lecture
Joao Montero, Medtronic

Mon Nov 05

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Matthew Jacobs, University of California, Los Angeles

Mon Nov 05

Topology Seminar

3:30pm - Vincent Hall 301
Topology Seminar: TBA
Sarah Yeakel, University of Maryland

Tue Nov 06

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Fri Nov 09

Lie Theory Seminar

3:35pm - Vincent Hall 313
Lie Theory Seminar
Rong Zhou, Institute for Advanced Study

Mon Nov 12

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Rebecca Willett, University of Chicago

Mon Nov 12

Topology Seminar

3:30pm - Vincent Hall 301
Topology Seminar: TBA
Eva Belmont, Northwestern

Tue Nov 13

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Fri Nov 16

IMA/MCIM Industrial Problems Seminar

1:25pm - Lind 305
Lecture
Raye Sosseh, Seagate Technology

Mon Nov 19

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lipschitz Regularized Deep Neural Networks Converge and are Robust to Adversarial Perturbations
Adam Oberman, McGill University

Mon Nov 19

Topology Seminar

3:30pm - Vincent Hall 301
Topology Seminar: TBA
Jeremy Hahn, Harvard University

Tue Nov 20

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Mon Nov 26

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Lexing Ying, Stanford University

Tue Nov 27

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Wed Nov 28

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Lexing Ying, Stanford University

Thu Nov 29

Colloquium

3:35pm - Vincent Hall 16
Colloquium
Lexing Ying, Stanford, Ordway Visitor

Thu Nov 29

IMA Data Science Lab Seminar

3:35pm - Vincent 16
Math Dept Colloquium Lecture
Lexing Ying, Stanford University

Tue Dec 04

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Thu Dec 06

Colloquium

3:35pm - Vincent Hall 16
Colloquium
Will Sawin, Columbia University

Fri Dec 07

Topology Seminar

3:30pm - TBA
Topology Seminar: TBA
Tom Bachmann, MIT

Fri Dec 07

Lie Theory Seminar

3:35pm - Vincent Hall 313
Lie Theory Seminar
Koji Shimizu, University of California, Berkeley

Fri Dec 07

Combinatorics Seminar

3:35pm - Vincent Hall 570
Combinatorics Seminar
Anna Pun, Drexel University

Mon Dec 10

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Lori Ziegelmeier, Macalester College

Mon Dec 10

Topology Seminar

3:30pm - Vincent Hall 301
Topology Seminar: TBA
Aaron Landesman, Stanford

Tue Dec 11

Climate Seminar

11:15am - 570 Vincent Hall
Climate Change Seminar
Richard McGehee

Fri Jan 25

MCFAM Seminar

5:30pm - Vincent Hall 16
Model selection, low/high dimensional regression variable selection
Dr. Jie Dingji

Mon Jan 28

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Guanglin Xu, University of Minnesota, Twin Cities

Fri Feb 08

IMA/MCIM Industrial Problems Seminar

1:25pm - Lind 305
Lecture
Karyn Sutton, The Institute for Disease Modeling

Fri Feb 15

Lie Theory Seminar

3:35pm - Vincent Hall 313
Lie Theory Seminar
Lue Pan,, University of Chicago

Fri Apr 12

Lie Theory Seminar

3:35pm - Vincent Hall 313
Lie Theory Seminar
Yifeng Liu, Yale University

Mon Apr 22

IMA Data Science Lab Seminar

1:25pm - Lind 305
Lecture
Thomas Hou, California Institute of Technology