MSCS Seminar Calendar

Tuesday January 22, 2019
pdf * Quantum Topology / Hopf Algebra Seminar
Smooth Generic Position
Jonathan Schneider (UIC)
3:00 PM in 612 SEO
We generalize classical knot diagrams and moves to higher dimensions.
Smooth maps are generic when they cannot be fundamentally altered by small perturbations.
Codimension-1 generic maps may be decomposed into simple structures of finitely many types.
We catalog these structures for dimensions 0 through 3, and also catalog their moves.

pdf * Louise Hay Logic Seminar
IP, SOP, and instability (1)
Paolo Degiorgi
3:30 PM in 427 SEO
Wednesday January 23, 2019
pdf * Mathematics Education Colloquium
Student perceptions of MyMathLab in Developmental Courses
Aida Alibek (UIC)
10:45 AM in 612 SEO
We will discuss a paper by D.Holt, W.Holt & R.Lumadue "At Cross-Purposes with a Developmental Mathematics Course: Perceptions of Students on the Use of MyMathLab".
This is a discussion seminar, so although prior reading is recommended it is not required. Feel free to come and join the conversation! Everyone is welcome!

pdf * Special Colloquium
Too much data!
John Stufken (Arizona State University)
3:00 PM in 636 SEO
The enormous amounts of data that are collected in applications in a wide variety of fields create challenges and opportunities for statisticians. One of the challenges is that traditional statistical methods for data of smaller size may no longer be applicable in the new “big data” environment, for computational reasons or otherwise. The corresponding opportunity lies in the need to develop methods that are applicable for big data. The simplest such methods, and often the most elegant ones, are based on innovations that allow familiar techniques to be applied in this new environment in a computationally feasible way. Adapting existing methods for this new environment can typically not be accomplished by putting “old wine in new bottles”, but requires clever innovations. Traditionally, it goes against a statistician’s core principles to “discard” some of the data. Yet, some data sets are so large that exploration and analysis must proceed by using only some of the data. This leads to the idea of selecting subdata from big data and drawing conclusions from an analysis of the subdata. While this idea brings traditional statistical analysis methods potentially back into the picture, there are the immediate questions of how to select the subdata and, if needed, how to adjust analysis methods. Innovations to accomplish this are the focus of this presentation. We discuss subdata selection methods, with special emphasis on information-based subdata selection, as well as challenges and shortcomings associated with these methods.

pdf * Graduate Algebraic Geometry Seminar
Artin-Mumford’s “Some elementary examples of unirational varieties which are not rational” explanation
Fumiaki Suzuki (UIC)
3:00 PM in 712 SEO
We review Artin-Mumford’s construction of a 3-fold which is unirational and non-rational. We start from the motivation, give a construction, and explain it in terms of Severi-Brauer schemes

pdf * Graduate Geometry, Topology and Dynamics Seminar
Spring Organizational Meeting
Keaton Quinn (UIC)
3:00 PM in 612 SEO

pdf * Algebraic Geometry Seminar
The stable cohomology of moduli spaces of sheaves on surfaces
Izzet Coskun (UIC)
4:00 PM in 427 SEO
Moduli spaces of Gieseker semistable sheaves on surfaces play a central role in mathematics and have many applications to cycles and linear systems on surfaces, Donaldson's 4-manifold invariants and mathematical physics. In this talk, I will describe a conjecture with Matthew Woolf on the cohomology of these moduli spaces. We conjecture that the Betti numbers of these moduli spaces stabilize as the discriminant tends to infinity and that the stable numbers are independent of the rank and the first Chern class. In particular, calculations of Gottsche determine the stable numbers. I will give some evidence for the conjecture. This is joint work with Matthew Woolf.

pdf * Graduate Groups and Dynamics Seminar
Introduction to the work of "7 samurais"
Alex Furman (UIC)
4:00 PM in 612 SEO
This semester we plan to discuss the recent work of Abert-Bergeron-Biringer-Gelander-Nikolov-Raimbault-Samet) and to (hereafter 7s) that, among other things, discusses the asymptotic growth of the Betti numbers of compact locally symmetric manifolds $b_i(M)/vol(M)$ as $vol(M)\to \infty$, where $M=\Gamma\backslash X$ are quotients of a fixed (higher rank) irreducible symmetric space.
To understand these results (and to put them in perspective) we need to discuss a variety of important and cool math topics: - L^2-Betti numbers - Luck's Approximation Theorem - Benjaminy-Schramm convergence - Invariant Random Subgroups - Stuck-Zimmer theorem - and more... There is some topology, geometry, dynamics, and number theory in this all.
In this first talk we will give a general overview, and discuss soem organizational topics.
Thursday January 24, 2019
pdf * Logic Seminar
TBA
Carlos Arreche (University of Texas)
3:30 PM in 427 SEO
Please note the alternate day!
Monday January 28, 2019
pdf * Geometry, Topology and Dynamics Seminar
TBA
Kevin Schreve (University of Chicago)
3:00 PM in 636 SEO

pdf * Analysis and Applied Mathematics Seminar
Interaction of modulated water waves of finite depth
Yannis Giannoulis (University of Ioannina, Greece)
4:00 PM in 636 SEO
In this talk we consider the water wave problem of finite depth as a nonlinear dispersive system. Motivated by this feature, we are interested in the macroscopic dynamics of the envelopes of small, macroscopically amplitude-modulated fixed carrier waves, the latter being plane wave solutions of the linearized problem. More specifically, we want to know whether some sort of interaction of different (modulated) carrier waves can be observed macroscopically. For pure gravity waves such a macroscopic interaction can be observed only for the next-to-leading order corrections of the macroscopic amplitudes and a relevant system of modulation equations is derived. This system is then justified by employing the stability of the original water wave problem, as established by Lannes in his 2013 book. Time permitting, we discuss also the completely different situation in the case of capillary-gravity water waves, where for resonant carrier waves macroscopic interactions can be observed for the leading order amplitudes and where a stability result for the original water wave problem has to take into account the second-order differential operator of the surface tension.
Tuesday January 29, 2019
pdf * Special Colloquium
Individualized Multi-Directional Variable Selection
Dr. Annie Qu (UIUC)
3:00 PM in 636 SEO
In this paper we propose a heterogeneous modeling framework which achieves the individual-wise feature selection and the covariate-wise subgrouping simultaneously. In contrast to conventional model selection approaches,the key component of the new approach is to construct a separation penalty with multi-directional shrinkages, which facilitates individualized modeling to distinguish strong signals from noisy ones and selects different relevant variables for different individuals. Meanwhile, the proposed model identifies subgroups among which individuals share similar covariates’ effects, and thus improves individualized estimation efficiency and feature selection accuracy. Moreover, the proposed model also incorporates within individual correlation for longitudinal data. We provide a general theoretical foundation under a double-divergence modeling framework where the number of individuals and the number of individual-wise measurements can both diverge, which enables the inference on both an individual level and a population level. In particular, we establish the population-wise oracle property for the individualized estimator to ensure its optimal large sample property under various conditions. Simulation studies and an application to HIV longitudinal data are illustrated to compare the new approach to existing variable selection methods.
Tea at 4:00-4:30 PM at SEO 300.
Wednesday January 30, 2019
pdf * Graduate Algebraic Geometry Seminar
Ein-Lazarsfeld's Theorem on Singularities of Theta Divisors
Gregory Taylor (UIC)
3:00 PM in 712 SEO

pdf * Graduate Analysis Seminar
Introduction to the water wave problem of finite depth and modulated waves
Yannis Giannoulis
4:00 PM in 1227 SEO
We will discuss the derivation of the water wave equations for finite depth, their different features depending on the relation between their characteristic lengths, and the notion of modulated waves, and aim to give an outline of the proof of Lannes’s well-posedness result.

pdf * Statistics Seminar
Sufficient dimension folding via distance covariance
Wenhui Sheng (Marquette University)
4:00 PM in 636 SEO
We propose a new sufficient dimension folding method using distance covariance for regression in which the predictors are matrix- or array-valued. The method works efficiently without strict assumptions on the predictor. It is model-free and neither smoothing techniques or selection of tuning parameters is needed. Moreover, it works for both univariate and multivariate response cases. We use two approaches to estimate the structural dimensions: bootstrap method and a new method of local search. Simulations and real data analysis support the efficiency and effectiveness of the method.

pdf * Graduate Student Colloquium
TBD
Sam Dodds (UIC)
5:00 PM in 636 SEO
Thursday January 31, 2019
pdf * Louise Hay Logic Seminar
IP, SOP, and instability (2)
Paolo Degiorgi
4:00 PM in 427 SEO
Monday February 4, 2019
pdf * Analysis and Applied Mathematics Seminar
TBA
Helena J. Nussenzveig Lopes (IM-UFRJ)
4:00 PM in 636 SEO
TBA
Tuesday February 5, 2019
pdf * Logic Seminar
TBA
Paul Larson (Miami University)
3:30 PM in 427 SEO
Wednesday February 6, 2019
pdf * Mathematics Education Colloquium
Something is rotten in the state of Calc 1
Scott Baldridge (Louisiana State University)
10:45 AM in 612 SEO
TBA

pdf * Graduate Algebraic Geometry Seminar
TBD
Jay Kopper (UIC)
3:00 PM in 712 SEO

pdf * Graduate Student Colloquium
TBD
Joel Stapleton (UIC)
5:00 PM in 636 SEO
Monday February 11, 2019
pdf * Analysis and Applied Mathematics Seminar
TBA
Shawn Walker (Louisiana State University)
4:00 PM in 636 SEO
Wednesday February 13, 2019
pdf * Graduate Algebraic Geometry Seminar
TBD
See-Hak Seong (UIC)
3:00 PM in 712 SEO

pdf * Statistics Seminar
TBA
Chuanshu Ji (University of North Carolina at Chapel Hill)
4:00 PM in 636 SEO
Monday February 18, 2019
pdf * Analysis and Applied Mathematics Seminar
Simulating Multilayer Plasmonic Devices with Domain Decomposition Methods: High-Order Perturbation of Surfaces Implementations
David Nicholls (University of Illinois at Chicago)
4:00 PM in 636 SEO
The faithful modeling of the propagation of linear waves in a layered, periodic structure is of paramount importance in many branches of the applied sciences, in particular, in the simulation and design of multilayer plasmonic devices. In this talk we present a novel numerical algorithm for the simulation of such problems which is free of the artificial singularities present in related approaches. We advocate for a non-overlapping domain decomposition method (DDM) phrased in terms of Impedance-Impedance Operators that are immune to the Dirichlet eigenvalues which plague the Dirichlet-Neumann Operators that appear in classical formulations. We demonstrate a High-Order Spectral algorithm to simulate these operators based upon a High-Order Perturbation of Surfaces methodology which is rapid, robust, and highly accurate. We demonstrate the validity and utility of our approach with a sequence of numerical simulations.
Wednesday February 20, 2019
pdf * Graduate Algebraic Geometry Seminar
TBD
Ben Gould (UIC)
3:00 PM in 712 SEO

pdf * Statistics Seminar
TBA
Subhashis Ghoshal (North Carolina State University)
4:00 PM in 636 SEO
Monday February 25, 2019
pdf * Geometry, Topology and Dynamics Seminar
The Extended Haagerup fusion categories
Emily Peters (Loyola University)
3:00 PM in 636 SEO
TBA

pdf * Analysis and Applied Mathematics Seminar
TBA
Michael Greenblatt (University of Illinois at Chicago)
4:00 PM in 636 SEO
Tuesday February 26, 2019
pdf * Logic Seminar
TBA
Iian Smythe (Rutgers University)
3:30 PM in 427 SEO
Wednesday February 27, 2019
pdf * Graduate Algebraic Geometry Seminar
TBD
Shravan Patankar (UIC)
3:00 PM in 712 SEO

pdf * Statistics Seminar
TBA
William Li (Shanghai Advanced Institute of Finance)
4:00 PM in 636 SEO
Friday March 1, 2019
pdf * Departmental Colloquium
Part of UIC Distinguished Lecture Series
Peter Sarnak (Princeton)
3:00 PM in 636 SEO
Monday March 4, 2019
pdf * Analysis and Applied Mathematics Seminar
TBA
Gideon Simpson (Drexel University)
4:00 PM in 636 SEO
Wednesday March 6, 2019
pdf * Statistics Seminar
TBA
Yue Niu (University of Arizona)
4:00 PM in 636 SEO
Friday March 8, 2019
pdf * Departmental Colloquium
TBA
Bhargav Narayanan (Rutgers)
3:00 PM in 636 SEO
Monday March 11, 2019
pdf * Geometry, Topology and Dynamics Seminar
TBA
Mikolaj Fraczyk (Renyi Institute)
3:00 PM in 636 SEO

pdf * Analysis and Applied Mathematics Seminar
TBA
Paula Vasquez (University of South Carolina)
4:00 PM in 636 SEO
Wednesday March 13, 2019
pdf * Statistics Seminar
TBA
Dr. Xiao Zhang (Michigan Technological University)
4:00 PM in 636 SEO
TBA

pdf * Graduate Student Colloquium
TBD
Tom Dean (UIC)
5:00 PM in 636 SEO
Friday March 15, 2019
pdf * Departmental Colloquium
TBA
Kathryn Mann (Brown University)
3:00 PM in 636 SEO
Monday March 18, 2019
pdf * Geometry, Topology and Dynamics Seminar
TBA
Ruadhai Dervan (Cambridge)
3:00 PM in 636 SEO
Tuesday March 19, 2019
pdf * Logic Seminar
TBA
Joshua Wiscons (Sacramento State )
3:30 PM in 427 SEO
Wednesday March 20, 2019
pdf * Statistics Seminar
TBA
Mengjia Yu (UIUC)
4:00 PM in 636 SEO

pdf * Graduate Student Colloquium
TBD
Fumiaki Suzuki (UIC)
5:00 PM in 636 SEO
Friday March 22, 2019
pdf * Departmental Colloquium
TBA
Hans Mueller (UC Davis)
3:00 PM in 636 SEO
Wednesday March 27, 2019
pdf * Statistics Seminar
TBA
Xianyang Zhang (Texas A&M University)
4:00 PM in 636 SEO
Monday April 1, 2019
pdf * Analysis and Applied Mathematics Seminar
On a dissipative Gross-Pitaevskii-type model for exciton-polariton condensates
Ryan Obermeyer (University of Illinois at Chicago)
4:00 PM in 636 SEO
We study a generalized dissipative Gross-Pitaevskii-type model arising in the description of exciton-polariton condensates. We derive rigorous existence and uniqueness results for this model posed on the one dimensional torus and derive various a-priori bounds on its solution. Then, we analyze in detail the long time behavior of spatially homogenous solutions and their respective steady states. In addition, we will present numerical simulations in the case of more general initial data. We also study the corresponding adiabatic regime which results in a single damped-driven Gross-Pitaveskii equation and compare its dynamics to the one of the full coupled system.
Joint work with C. Sparber, P. Antonelli, P. Markowich, and J. Sierra
Wednesday April 3, 2019
pdf * Graduate Algebraic Geometry Seminar
TBD
Adam Pratt (UIC)
3:00 PM in 712 SEO

pdf * Statistics Seminar
TBA
Marco Ferreira (Virginia Tech)
4:00 PM in 636 SEO

pdf * Graduate Student Colloquium
TBD
Aida Alibek (UIC)
5:00 PM in 636 SEO
Friday April 5, 2019
pdf * Departmental Colloquium
TBA
Phillip Griffiths (Institute for Advanced Study)
3:00 PM in 636 SEO
Monday April 8, 2019
pdf * Mathematical Computer Science Seminar
TBA
Andrew Suk (UCSD)
3:00 PM in 427 SEO
Wednesday April 10, 2019
pdf * Graduate Algebraic Geometry Seminar
TBD
Tian Wang (UIC)
3:00 PM in 712 SEO

pdf * Algebraic Geometry Seminar
TBA
Alex Perry (Columbia University)
4:00 PM in 427 SEO

pdf * Statistics Seminar
TBA
Stacey Tannenbaum (Astellas)
4:00 PM in 636 SEO
Friday April 12, 2019
pdf * Departmental Colloquium
TBD
Nikhil Srivastava (UC Berkeley)
3:00 PM in 636 SEO
Monday April 15, 2019
pdf * Analysis and Applied Mathematics Seminar
TBA
Ying Wang (University of Oklahoma)
4:00 PM in 636 SEO
Wednesday April 17, 2019
pdf * Graduate Algebraic Geometry Seminar
TBD
Jacob Mayle (UIC)
3:00 PM in 712 SEO

pdf * Statistics Seminar
TBA
Yehua Li (University of California at Riverside)
4:00 PM in 636 SEO

pdf * Graduate Student Colloquium
TBD
Nick Reynolds (UIC)
5:00 PM in 636 SEO
Friday April 19, 2019
pdf * Algebraic Geometry Seminar
Double ramification cycles for target varieties
Rahul Pandharipande (ETH)
2:00 PM in 427 SEO
A basic question in the theory of algebraic curves is whether a divisor represents the zeros and poles of a rational function. An explicit solution in terms of periods was given by the work of Abel and Jacobi in the 19th century. In the past few years, a different approach to the question has been pursued: what is the class in the moduli of pointed curves of the locus of such divisors? The answer in Gromov-Witten theory is given by Pixton's formula for the double ramification cycle. I will discuss recent work with F. Janda, A. Pixton, and D. Zvonkine which considers double ramification cycles for target varieties X (where Pixton's original question is viewed as the X=point case). I will also discuss the associated relations studied by Y. Bae.

pdf * Departmental Colloquium
TBA
Martina Bode and Jenny Ross (UIC)
3:00 PM in 636 SEO
Monday April 22, 2019
pdf * Analysis and Applied Mathematics Seminar
TBA
Tristan Buckmaster (Princeton University)
4:00 PM in 636 SEO
TBA
Wednesday April 24, 2019
pdf * Statistics Seminar
TBA
Leonard Stefanski (North Carolina State University)
4:00 PM in 636 SEO
Friday April 26, 2019
pdf * Departmental Colloquium
TBA
Richard Samworth (University of Cambridge)
3:00 PM in 636 SEO
Monday April 29, 2019
pdf * Geometry, Topology and Dynamics Seminar
TBA
Yulan Qing (University of Toronto)
3:00 PM in 636 SEO

pdf * Analysis and Applied Mathematics Seminar
TBA
Colette Guillope (Universite de Paris Est)
4:00 PM in 636 SEO
Wednesday May 1, 2019
pdf * Statistics Seminar
TBA
Solomon Harrar (University of Kentucky )
4:00 PM in 636 SEO

pdf * Algebraic Geometry Seminar
TBA
Antoni Rangachev (University of Chicago)
4:00 PM in 427 SEO
Monday May 6, 2019
pdf * Analysis and Applied Mathematics Seminar
TBA
Theodor Drivas (Princeton University)
4:00 PM in 636 SEO
TBA
Monday September 9, 2019
pdf * Geometry, Topology and Dynamics Seminar
TBA
Abdellah Lahdili (Montreal)
3:00 PM in 636 SEO
Friday October 11, 2019
pdf * Departmental Colloquium
TBA
Moon Duchin (Tufts)
3:00 PM in 636 SEO
Friday November 1, 2019
pdf * Departmental Colloquium
Midwest Dynamical Systems Conference
TBA (TBA)
3:00 PM in 636 SEO
Monday November 11, 2019
pdf * Geometry, Topology and Dynamics Seminar
TBA
Xiaowei Wang (Rutgers)
3:00 PM in 636 SEO
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