UMD Math Weekly Colloquium/Seminar Notices for
Sat, February 17, 2018 to Fri, February 23, 2018

Algebra-Number Theory - Ramification Theory for Arbitrary Valuation Rings in Positive Characteristic.
Speaker: Vaidehee Thatte (Queen's University, Ontario, Canada) - http://mast.queensu.ca/~vaidehee/
Abstract: In classical ramification theory, we consider extensions of complete discrete valuation rings with perfect residue fields. We would like to study arbitrary valuation rings with possibly imperfect residue fields and possibly non-discrete valuations of rank >=1, since many interesting complications arise for such rings. In particular, defect may occur (i.e. we can have a non-trivial extension, such that there is no extension of the residue field or the value group). We present some new results for Artin-Schreier extensions of arbitrary valuation fields in positive characteristic p. These results relate the \higher ramifi cation ideal" of thee extension with the ideal generated by the inverses of Artin-Schreier generators via the norm map. We also introduce a generalization and further refinement of Kato's refined Swan conductor in this case. Similar results are true in mixed characteristic (0; p).
When: Mon, February 19, 2018 - 2:00pm
Where: Kirwan Hall 3206

RIT on Applied PDE - Measures of Measures and PDEs in Infinite Dimensions
Speaker: Pierre-Emmanuel Jabin (University of Maryland) -
When: Mon, February 19, 2018 - 3:00pm
Where: Kirwan Hall 1311

Geometry-Topology - Hyperbolic surfaces as singular flat surfaces
Speaker: Aaron Feynes (University of Toronto) - http://www.math.toronto.edu/afenyes/
When: Mon, February 19, 2018 - 3:15pm
Where: Kirwan Hall 3206

RIT on Quantum Information - Morphisms in categories of nonlocal games (cont'd)
Speaker: Brad Lackey (University of Maryland) - http://www.umiacs.umd.edu/~bclackey
When: Mon, February 19, 2018 - 4:15pm
Where: Atlantic 3100A

Geometry-Topology
Speaker: Andy Neitzke (University of Texas) - https://www.ma.utexas.edu/users/neitzke/
When: Tue, February 20, 2018 - 10:00am
Where: Kirwan Hall 3206

Logic - Model Theory Reading Seminar
Speaker: Vince Guingona (Towson University) -
When: Tue, February 20, 2018 - 2:00pm
Where: Kirwan Hall 1311

Norbert Wiener Center - Heat diffusion on inverse limit spaces
Speaker: Patricia Alonso Ruiz (U Conn) -
When: Tue, February 20, 2018 - 2:00pm
Where: Kirwan Hall 3206

Logic - Independence in generic expansions and fusions
Speaker: Alex Kruckman (Indiana University) -
When: Tue, February 20, 2018 - 3:30pm
Where: Kirwan Hall 1311

Numerical Analysis - Nonconforming Finite Element Methods for High Order Elliptic Equations in Rn
Speaker: Shuonan Wu (Penn State University) - http://www.personal.psu.edu/sxw58/
When: Tue, February 20, 2018 - 3:30pm
Where: Kirwan Hall 3206

Student Algebraic Geometry Seminar - The T^i functors
Speaker: Yousheng Shi (UMD) -
When: Tue, February 20, 2018 - 3:30pm
Where: Math 0104

RIT on Statistics - False Discovery Rates
Speaker: Yunjiang Ge (STAT Program) -
When: Tue, February 20, 2018 - 4:00pm
Where: MTH 1313

Student Geometry and Topology - The dilogarithm function and hyperbolic volume
Speaker: Laura Iosip () -
When: Wed, February 21, 2018 - 1:00pm
Where: Kirwan Hall 1310

CSCAMM - Boundary layers and the vanishing viscosity limit in incompressible flows
Speaker: Prof. Anna Mazzucato (Mathematics, Penn State University) - http://www.personal.psu.edu/alm24/
When: Wed, February 21, 2018 - 2:00pm
Where: CSIC 4122

Lie Groups and Representation Theory - Categorification of Young idempotents
Speaker: Matthew Hogancamp (University of Southern California), http://www-bcf.usc.edu/~hogancam/
Abstract: I will discuss joint work with Ben Elias in which we construct complexes of Soergel bimodules which categorify the Young idempotents in the Hecke algebras of type A_n. The construction is an application our theory of categorical diagonalization to the case of the full twist Rouqiuer complex acting on Soergel bimodules. Our categorified Young idempotents are key elements in the Gorsky-Negut-Rasmussen conjectures, which relate categories of Soergel bimodules to Hilbert schemes of points in the plane. I will explain this connection, and give several examples.
When: Wed, February 21, 2018 - 2:00pm
Where: Kirwan 1311

Student AMSC - "Low-rank iterative solvers for stochastic PDEs" and TBA
Speaker: Tengfei Su and TBA (AMSC) -
When: Wed, February 21, 2018 - 3:00pm
Where: Kirwan Hall 1310

Colloquium - Alpha invariants and birational geometry
Speaker: Ivan Cheltsov (University of Edinburgh, UK) - http://www.maths.ed.ac.uk/cheltsov/
Abstract: Tian introduced alpha invariants to study the existence of Kahler-Einstein metrics on Fano manifolds. In this talk we describe (explicit and implicit) appearance of alpha invariants in (global and local) birational geometry. 
When: Wed, February 21, 2018 - 3:15pm
Where: Kirwan Hall 3206

RIT on Deep Learning - Training Quantized Nets: A Deeper Understanding
Speaker: Liam Fowl (UMD) -
When: Thu, February 22, 2018 - 10:00am
Where: Kirwan Hall 3206

Applied Dynamics - Classical-to-quantum correspondence and transitions in chaotic dynamics of out-of-time-ordered correlators
Speaker: Victor Galitski - UMD Physics
When: Thu, February 22, 2018 - 12:30pm
Where: ERF 1027

Dynamics - Stochastic properties of the Z^2-periodic Sinai billiard
Speaker: (Francoise Pene) - http://lmba.math.univ-brest.fr/perso/francoise.pene/
When: Thu, February 22, 2018 - 2:00pm
Where: Kirwan Hall 1311

RIT on Geometry and Physics - Geometry of parameter space
Speaker: Freddy Cisneros -
When: Thu, February 22, 2018 - 3:30pm
Where: Physics Bldg 1117

Special Lecture - Topics in the Nonlinear Schrodinger Equation - Lecture Series (JHU)
Speaker: Benjamin Dodson
When: Fri, February 23, 2018 - 2:00pm
Where: Room 1313 Kirwan Hall

Colloquium - Nonlinear fluid-structure interaction with fiber-reinforced soft composites: a unified mathematical framework for mathematical analysis, computation and applications
Speaker: Suncica Canic (University of Houston) - https://www.math.uh.edu/~canic/
When: Fri, February 23, 2018 - 3:15pm
Where: Kirwan Hall 3206

A listing of This Week's Talks is available online at: http://www-math.umd.edu/research/this-weeks-seminars.html 


Ph.D. Oral Exams

Ph.D. Preliminary Oral Exam - Restless Bandits with Non-stationary Rewards
Speaker: Guowei Sun
When: Wed, February 21, 2018 - 9:15am
Where: 2224 AVW

Ph.D. Final Oral Exam - Numerical Methods for Non-Linear Geometric PDEs, Numerical Analysis and Computation
Speaker: Dimitrios Ntogkas
When: Thu, March 29, 2018 - 11:30am
Where: 1310 MTH


Social Events

Ice Cream Social & Cookie Time
When: Mon, March 12, 2018 - 2:30-3:15pm
Where: Rotunda (1st floor of Math Building)


Geometry Week at UMD
March 12-16, 2018

Following our regular Geometry-Topology and Informal Geometric Analysis seminars we will have pizza receptions to attract new geometers. If you are an undergraduate or graduate student curious about Geometry, please attend (free pizza). Graduate students, undergraduate students, and postdocs are especially encouraged to participate.

Geometry–Topology Seminar
Women in Geometry Pizza Reception
Speaker: Chaya Norton (Concordia University)
When: Mon, March 12 - 3:15pm
Where: Kirwan Hall 3206

Informal Geometric Analysis Seminar
Graduate Students in Geometry Pizza Reception
Speaker: Eleonora Di Nezza (IHES)
When: Tues, March 13 - 4pm
Where: Kirwan Hall 2300

Pi Day Colloquium
Speaker: Richard Schwartz (Brown University)
When: Wed, March 14 - 3:15pm
Where: Kirwan Hall 3206

Distinguished Lectures in Geometric Analysis
Speaker: Richard Schoen (Stanford & UC Irvine)
When: Thursday–Friday, March 15–16

Please visit https://www-math.umd.edu/geometry-week.html for more details.