## Colloquia

##### Thursday, December 3, 2015 at 2:30p.m. in VinH 16

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**Ezra Miller**
(*Duke University*)

**Abstract:**Applying topology to biology in statistical settings can reflect as much on the topology as it illuminates the biology, and it can lead to new outlooks on geometry and algebra. The topology in this case is persistent homology, which measures geometric structures using topological invariants. The examples here come from two datasets: magnetic resonance images of brain arteries and photographic images of fruit fly wings. The talk begins by explaining what we have learned about the geometry of blood vessels in aging human brains, along with lessons this exploration has taught us in general about statistical applications of ordinary, single-parameter persistent homology. The talk continues with persistent homology on multiple parameters, especially algebraic structures and geometric questions that arise from statistical treatments of morphometric data.

##### Thursday, December 3, 2015 at 3:30p.m. in VinH 16

#####
**Steven Sivek**
(*Princeton University*)

**Abstract:**A well-known principle in symplectic geometry says that information about the smooth structure on a manifold should be captured by the symplectic geometry of its cotangent bundle. One prominent example of this is Nadler and Zaslow's microlocalization correspondence, an equivalence between a category of constructible sheaves on a manifold and a symplectic invariant of its cotangent bundle called the Fukaya category. The goal of this talk is to describe a model for a relative version of this story in the simplest case, corresponding to Legendrian knots in the standard contact 3-space. This construction, called the augmentation category, is a powerful invariant which is defined in terms of holomorphic curves but can also be described combinatorially. I will describe some interesting properties of this category and relate it to a category of sheaves on the plane. This is joint work with Lenny Ng, Dan Rutherford, Vivek Shende, and Eric Zaslow.

### Monday, 30 November 2015

#### Reading Seminar on Automorphic Forms

*Reading seminar for Automorphic Forms*at 9:00a.m. in VinH 203A

Please send an email to wanxx123@umn.edu for more information.

#### Student Number Theory Seminar

*Student Number Theory Seminar*at 12:20p.m. in VinH 313

Please send an email to grodz007@umn.edu for more information.

#### Topology Seminar

*Deformation theory II*at 2:30p.m. in VinH 364

**Martin Markl (Ordway visitor)**(

*Institute of Mathematics of the Czech Academy*)

A mini-course on deformation theory based on L_\infty-algebras and the Maurer-Cartan equation, culminating with an outline of Kontsevich's deformation quantization proof.

Please send an email to cwesterl@umn.edu for more information.

#### Automorphic Forms and Number Theory

*Automorphic forms and number theory: will not meet*at 3:35p.m. in Vincent 301

**(will not meet)**

Please send an email to garrett@umn.edu for more information.

### Tuesday, 1 December 2015

#### Geometric Analysis Learning Seminar

*Geometry Analysis Learning Seminar*at 10:30a.m. in VinH 203A

Please send an email to hexxx221@umn.edu for more information.

#### Climate Seminar

*Title to be announced*at 11:15a.m. in VinH 570

**Jessica Hellman**(

*Institute on the Environment*)

Please send an email to mcgehee@umn.edu for more information.

#### Math Physics Seminar

*Math Physics seminar*at 12:20p.m. in VinH 1

Please send an email to coxxx328@umn.edu for more information.

#### IMA Data Science Lab Seminar

*Vipin Kumar: Understanding Global Change: Opportunities and Challenges for Data Driven Research*at 1:25p.m. in Lind 305

Vipin Kumar (University of Minnesota, Twin Cities) This talk will present an overview of research being done in a large interdisciplinary project on the development ...
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Please send an email to lerman@umn.edu for more information.

#### Math Biology Seminar

*Math Biology Seminar -- TBA*at 1:30p.m. in VinH 311

Please send an email to chengy@umn.edu for more information.

#### Differential Geometry / Symplectic Topology Seminar

*Differential Geometry/Symplectic Topology -- TBA*at 1:30p.m. in VinH 570

Please send an email to lixxx248@umn.edu for more information.

### Wednesday, 2 December 2015

#### AMS Student Chapter Seminar

*AMS Student Chapter Seminar*at 12:20p.m. in VinH 570

Please send an email to wil00108@umn.edu for more information.

#### Algebraic Geometry

*Algebraic Geometry seminar*at 1:30p.m. in VinH 301

Please send an email to ytzeng@umn.edu for more information.

#### PDE Seminar

*The Fokker-Planck equation in bounded domains*at 3:35p.m. in VinH 213

**Hyung Ju Hwang, POSTECH**(

*Brown University*)

In this talk, we consider the initial-boundary value problem for the Fokker-Planck equation in an interval or in a bounded domain with absorbing boundary conditions. ...
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Please send an email to spirn@umn.edu for more information.

### Thursday, 3 December 2015

#### IMA Annual Program

#### Commutative Algebra Seminar

*Irreducible decomposition of binomial ideals*at 11:15a.m. in VinH 203A

**Ezra Miller**(

*Duke University*)

This talk presents the answer to Problem 7.5 in the paper "Binomial ideals" by Eisenbud and Sturmfels: "Does every binomial ideal have an irreducible decomposition ...
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Please send an email to cbekesc@math.umn.edu for more information.

#### Math Club Seminar

*Math Club -- TBA*at 12:20p.m. in VinH 570

Please send an email to olso4056@umn.edu for more information.

#### Differential Geometry / Symplectic Topology Seminar

*Differential Geometry/Symplectic Topology -- TBA*at 1:30p.m. in VinH 570

Please send an email to lixxx248@umn.edu for more information.

#### Colloquium

*Interactions between topology, biology, and imaging*at 2:30p.m. in VinH 16

**Ezra Miller**(

*Duke University*)

Applying topology to biology in statistical settings can reflect as much on the topology as it illuminates the biology, and it can lead to new ...
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Please send an email to cad@umn.edu for more information.

*The augmentation category of a legendrian knot*at 3:30p.m. in VinH 16

**Steven Sivek**(

*Princeton University*)

A well-known principle in symplectic geometry says that information about the smooth structure on a manifold should be captured by the symplectic geometry of its ...
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Please send an email to cad@umn.edu for more information.

#### Student Combinatorics Seminar

*Student Combinatorics Seminar -- TBA*at 4:40p.m. in VinH 1

Please send an email to douvr001@umn.edu for more information.

### Friday, 4 December 2015

#### GRE Preparation Seminar

*GRE Preparation Seminar - TBA*at 12:20p.m. in Keller Hall 3-230

Please send an email to adams005@umn.edu for more information.

#### Industrial Problems Seminar

#### p-Adic Analysis and Zeta Functions

*p-Adic Analysis and Zeta Functions -- TBA*at 1:25p.m. in VinH 364

Please send an email to sperber@umn.edu for more information.

#### Probability Seminar

*Parabolic and hyperbolic unimodular maps*at 2:30p.m. in VinH 311

**Gourab Ray**(

*University of Cambridge*)

Maps are graphs that come equipped with an embedding on a surface. We classify all unimodular random rooted maps according to a notion of expected ...
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Please send an email to arnab@umn.edu for more information.

#### Lie Theory Seminar

*Lie Theory -- TBA*at 3:30p.m. in VinH 207

Please send an email to dhjiang@math.umn.edu for more information.

#### Combinatorics Seminar

*Grassmannian cluster algebras and webs*at 3:35p.m. in VinH 570

**Christopher Fraser**(

*Michigan*)

We will show that the cluster structures on Grassmannians and Fock-Goncharov spaces are related by a notion called a quasi-isomorphism of cluster algebras. Using this ...
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Please send an email to mchmutov@GMAIL.com for more information.

#### Student Symplectic and Low Dimensional Topology Seminar

*Graduate Symplectic and Low Dimensional Topology - TBA*at 4:30p.m. in VinH 2

Please send an email to sagla004@umn.edu for more information.

#### MCFAM Seminar

*MCFAM Seminar - CCAR Stress Testing and Quantitative Modeling*at 5:30p.m. in Vincent Hall 16

**Jessica Mitra - Vice President CCAR Quantitative Modeling**(

*Deustche Bank - NYC*)

Abstract: This seminar will describe the current landscape of CCAR Stress Testing and Quantitative Modeling. We will begin with an overview of CCAR and then ...
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Please send an email to rdixon@math.umn.edu for more information.