## Colloquium

##### Thursday, October 8, 2015 at 3:30p.m.

#####
**Michael Lacey (Ordway visitor)**
(*Georgia Tech*)

**Abstract:**We recall Lennart Carleson's Theorem asserting the pointwise convergence of partial summation of Fourier series of square integrable functions. We explain what the Theorem says, and why it is worthy of citation by the Abel Prize committee: It is a "multi-scale" theorem. The talk finishes with subtle refinements and (possible) extensions of the theorem.

### Monday, 5 October 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.

#### IMA Annual Program

*Arthur J. Krener: Nonlinear Systems Toolbox*at 11:00a.m. in Lind 305

Arthur J. Krener (Naval Postgraduate School)

#### 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.

#### IMA Postdoc Seminar

*Minimization problems with a polyconvex type constraint*at 2:25p.m. in Lind Hall 305

**Romeo Awi**(

*IMA*)

#### Topology Seminar

*Categorification of Dijkgraaf-Witten theory*at 2:30p.m. in VinH 364

**Alexander A. Voronov**(

*University of Minnesota*)

This is a new perspective on an old topic: Dijkgraaf-Witten theory, i.e., gauge theory with a finite gauge group, producing a TQFT, i.e., a functor ...
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Please send an email to cwesterl@umn.edu for more information.

#### Automorphic Forms and Number Theory

*Automorphic forms and number theory*at 3:35p.m. in Vincent 301

Paul Garrett will speak on "Hilbert and Riesz transforms"

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

### Tuesday, 6 October 2015

#### Geometric Analysis Learning Seminar

*Singular part of the extremal metrics maximizing eigenvalues of the Laplacian*at 10:30a.m. in VinH 203A

**Pak-Yeung Chan**(

*U of M Mathematics Department*)

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

#### IMA Annual Program

*Arthur J. Krener: Nonlinear Systems Toolbox*at 11:00a.m. in Lind 305

Arthur J. Krener (Naval Postgraduate School)

#### Climate Seminar

*The Earth's energy imbalance*at 11:15a.m. in VinH 570

**Professor Richard McGehee**(

*U of M Mathematics Department*)

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

*Mihailo Jovanovic: Low-complexity Modeling of Partially Available Second-order Statistics via Matrix Completion*at 1:25p.m. in Lind 305

Mihailo Jovanovic (University of Minnesota, Twin Cities) We study the problem of completing partially known state statistics of complex dynamical systems using low-complexity linearized models. ...
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Please send an email to lerman@umn.edu for more information.

#### Math Biology Seminar

*Learning dynamic rules underlying properties of the plant immune network*at 1:30p.m. in VinH 311

**Dr. Fumiaki Katagirl**(

*Dept. of Plant Biology, UMN*)

The plant immune signaling network is under tremendous pressure: (1) their pathogens that can evolve much faster than them are continuously trying to break the ...
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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, 7 October 2015

#### IMA Annual Program

*Arthur J. Krener: Nonlinear Systems Toolbox*at 11:00a.m. in Lind 305

Arthur J. Krener (Naval Postgraduate School)

#### 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

*Homogeneous solutions of stationary Navier-Stokes equations with singular rays*at 3:30p.m. in room to be announced

**Yan Yan Li**(

*Rutgers University*)

Landau obtained explicit (-1)-homogeneous solutions of 3-d stationary Navier-Stokes euqations with precisely one singularity at the origin. These solutions are axisymmetric with no swirl. Sverak ...
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Please send an email to spirn@umn.edu for more information.

### Thursday, 8 October 2015

#### Commutative Algebra Seminar

*Commutative Algebra Seminar*at 11:15a.m. in VinH 203A

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

*Pointwise convergence of Fourier series: Past, present and future*at 3:30p.m. in VinH 16

**Michael Lacey (Ordway visitor)**(

*Georgia Tech*)

We recall Lennart Carleson's Theorem asserting the pointwise convergence of partial summation of Fourier series of square integrable functions. We explain what the Theorem says, ...
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more
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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, 9 October 2015

#### IMA Annual Program

*Arthur J. Krener: Nonlinear Systems Toolbox*at 11:00a.m. in Lind 305

Arthur J. Krener (Naval Postgraduate School)

#### 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

*Stefan E. Atev: Manufacturing at Internet Speeds: CAD/CAM Challenges in Rapid Manufacturing*at 1:25p.m. in Lind 305

Stefan E. Atev (Proto Labs, Inc.) Powerful computer-aided design and manufacturing (CAD/CAM) software systems have been available for decades, yet the process of getting physical ...
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#### p-Adic Analysis and Zeta Functions

*Rationality of Zeta and L-functions - a continuation*at 1:25p.m. in VinH 364

**Professor Steven Sperber**(

*U of M Mathematics Department*)

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

#### Probability Seminar

*No seminar due to 37th Midwest Probability Colloquium*at 2:30p.m. in VinH 311

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

*Puzzles and Equivariant K-theory of Grassmannians*at 3:35p.m. in VinH 570

**Oliver Pechenik**(

*UIUC*)

:The cohomology of the Grassmannian has a basis given by Schubert varieties. The structure coefficients of this ring are the celebrated Littlewood-Richardson coefficients, and are ...
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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

**Jun Li**(

*U of M Mathematics Department*)

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