Identifier,"Start Date / Time","End Date / Time",Title,Subtitle,Type,Description,Permalink,"Building Name",Room,"Location Name",Cost,Tags,Sponsors
117834-21840086,"2024-04-15 15:00:00","2024-04-15 16:00:00","RTG NT: Zero cycles on products of elliptic curves","Kartik Prasanna","Workshop / Seminar",Abstract:,https://events.umich.edu/event/117834,"East Hall",3088,"East Hall",,Mathematics,"Department of Mathematics"
112534-21829088,"2024-04-15 16:15:00","2024-04-15 17:30:00",GLNT,"Christopher Skinner (Princeton)","Workshop / Seminar",TBA,https://events.umich.edu/event/112534,"East Hall",3088,"East Hall",,Mathematics,"Department of Mathematics"
121388-21846489,"2024-04-16 16:00:00","2024-04-16 17:00:00","Math Undergraduate Seminar: Modular Curves and Moduli Spaces","Timothy Cheek","Lecture / Discussion","For motivation, we discuss elliptic curves and equivalent characterizations. We then discuss modular curves and their use in studying points on elliptic curves. After briefly touching on the modularity theorem, we turn to moduli spaces as a way of studying more general genus g curves. If time permits, we'll touch on moduli stacks and, more generally, algebraic stacks.",https://events.umich.edu/event/121388,"East Hall",B734,"East Hall",,"Mathematics
Talk
Undergraduate Students","Department of Mathematics"
120049-21843986,"2024-04-16 16:00:00","2024-04-16 17:20:00","How to apply for a math research postdoc",,"Workshop / Seminar","Considering applying for a research-focused postdoc position in math? Dick Canary---our department's chair of postdoc hiring---will lead an info session on the application process, offer advice for applicants, and answer your questions. Light refreshments will be served.",https://events.umich.edu/event/120049,"East Hall","Common Room","East Hall",,Mathematics,"Department of Mathematics"
119331-21842576,"2024-04-16 16:00:00","2024-04-16 17:00:00","Panel Q&A: How to apply for tenure-track jobs in math",,"Workshop / Seminar","""What is the process for applying for research-focused tenure-track positions in math?"" ""How do I prepare a strong application file?"" If you're considering applying, bring your questions to our panel of UM Faculty in pure and applied math. Our panelists---Lydia Bieri, Nir Gadish, Zaher Hani, and Ralf Spatzier---have recent experience on the UM tenure-line hiring committee, or on the tenure-track job market. Light refreshments will be served.
(Organized by Jenny Wilson)",https://events.umich.edu/event/119331,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
121361-21846453,"2024-04-16 17:30:00","2024-04-16 19:00:00","Lab of Geometry LoG(M) Poster Session",,Presentation,"Come learn about the research outcomes of this semester’s UM Lab of Geometry - LoG(M) (course MATH 440). Our featured projects are the following:
- Modeling the integrable spinning tops
- Calculations of exponential sums and Kloosterman sums
- Statistics of the symmetric group character tables
- Rank vs. bias in polynomials of high degree
- Probability distributions in nonlinear spin systems
Details presented by our lab’s research students!
Contact: Nir Gadish",https://events.umich.edu/event/121361,"East Hall","Lower Atrium","East Hall",,Mathematics,"Department of Mathematics"
121440-21846552,"2024-04-17 15:00:00","2024-04-17 15:50:00","Student Number Theory: A brief overview of Codes over Function Fields","Oscar Gonzalez","Workshop / Seminar","The first part of the talk will be a quick introduction to codes over function fields. Then in the second part I will talk a bit about algebraic geometry codes.",https://events.umich.edu/event/121440,"East Hall",5822,"East Hall",,Mathematics,"Department of Mathematics"
112183-21828569,"2024-04-17 16:00:00","2024-04-17 17:00:00","Utilizing game theory and deep learning to find optimal policies for large number of agents","Gokce Dayanikli, UIUC","Workshop / Seminar","In many real-life policy making applications, the principal (i.e., governor or regulator) would like to find optimal policies for a large population of interacting agents who optimize their own objectives in a game theoretical framework. With the motivation of finding optimal policies for large populations, we start with introducing continuous time Stackelberg mean field game problem between a principal and a large number of agents. In the model, the agents in the population play a non-cooperative game and choose their controls to optimize their individual objectives while interacting with the principal and the other agents in the society through the population distribution. The principal can influence the resulting mean field game Nash equilibrium through incentives to optimize her own objective. Therefore, Stackelberg mean field game problems are by their nature bi-level problems where we have an optimal control problem at the principal level and a Nash equilibrium problem at the population level. This bi-level nature creates many efficiency challenges for the implementation of numerical approaches. For this reason, we will analyze how to rewrite this bi-level problem as a single-level problem and propose a deep learning approach to solve it. Then we will briefly discuss the convergence of the numerical solution where we utilize the single level problem to the solution of the original problem. We will conclude by demonstrating some applications such as the systemic risk model for a regulator and many banks and an optimal contract problem between a project manager and a large number of employees.",https://events.umich.edu/event/112183,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
116007-21836060,"2024-04-17 16:00:00","2024-04-17 17:30:00","Algebraic Geometry Seminar: The topology of the moduli spaces of tropical unramified p-covers","Claudia Yun (U. Michigan)","Workshop / Seminar","Let p be a prime number. The moduli space M_{g, Z/pZ} parametrizes isomorphism classes of étale Z/pZ-Galois covers of smooth curves of genus g. Let M_g denote the moduli space of smooth curves of genus g. Then M_{g, Z/pZ} is itself an étale covering of M_g of degree p^{2g} - 1.
We study an associated moduli space of unramified tropical Z/pZ-covers of curves of genus g. Its rational homology is conjecturally identified with the top weight cohomology of M_{g, Z/pZ}. When g > 2, we identify a nested sequence of contractible loci in the moduli space of tropical covers and show that it is simply connected. In the case g=2, we also determine the homotopy type of the tropical space, showing that it is contractible for small p and is a wedge of spheres for p >3. This is joint work with Yassine El Maazouz, Paul Alexander Helminck, Felix Röhrle, and Pedro Souza.",https://events.umich.edu/event/116007,"East Hall",4096,"East Hall",,Mathematics,"Department of Mathematics"
117570-21839527,"2024-04-18 16:00:00","2024-04-18 17:00:00","Differential Equations Seminar: Some recent progress on integrable PDEs","Benjamin Harrop-Griffiths (Georgetown)","Workshop / Seminar","Integrable PDEs arise as leading-order models in an astoundingly wide range of physical scenarios, such as fluid dynamics, ferromagnetism, and nonlinear optics. For rapidly decaying solutions, the inverse scattering method provides a powerful tool for understanding their dynamics. However, due to the requirement of rapid decay, inverse scattering techniques cannot be used to analyze even the set of all finite energy solutions. In this talk, I will survey some recent work on the dynamics of solutions to integrable PDEs in translation-invariant spaces. In particular, I will discuss several optimal well-posedness results obtained in collaboration with Rowan Killip, Maria Ntekoume, and Monica Visan.",https://events.umich.edu/event/117570,"East Hall",EH4088,"East Hall",,Mathematics,"Department of Mathematics"
117421-21839283,"2024-04-18 16:00:00","2024-04-18 17:30:00","Tian-Todorov theorem","Hyunsuk Kim","Workshop / Seminar",TBA,https://events.umich.edu/event/117421,"East Hall",4096,"East Hall",,Mathematics,"Department of Mathematics"
114772-21833587,"2024-04-19 15:00:00","2024-04-19 16:00:00","AIM Seminar: Solving Large Linear Systems Without Constructing a Preconditioner","Michał Dereziński, EECS, University of Michigan","Lecture / Discussion","Abstract: Solving systems of linear equations has numerous applications across many areas, from data science and machine learning, to scientific computing, engineering and more. When these systems are too large to solve directly, iterative refinement methods such as conjugate gradient have proven to be a powerful alternative. The computational cost of these methods can be significantly affected by a problem-dependent condition number, which is often addressed by combining the iterative solver with a preconditioner, i.e., an easy to invert approximation of the original system. However, constructing a good preconditioner can still be very expensive, which leads to an undesirable trade-off between the cost of preconditioning and the cost of solving the linear system.
In this talk, I will present new stochastic iterative methods for solving linear systems based on the so-called Sketch-and-Project paradigm, which can reduce the condition number of the system without having to precondition it. This approach is based on the following phenomenon: Whenever the spectral structure of a linear system is amenable to constructing a strong preconditioner via low-rank matrix approximation, we can design a Sketch-and-Project solver that will implicitly take advantage of this to find the solution faster. In particular, I will show how this leads to solving an n x n linear system with at most k large (outlying) singular values in ~O( n^2 + n k^2 ) arithmetic operations, which is faster than the ~O( n^2 k ) cost of constructing a good preconditioner for this system.
Contact: Robert Krasny",https://events.umich.edu/event/114772,"East Hall",1084,"East Hall",,Mathematics,"Department of Mathematics"
117836-21840090,"2024-04-22 15:00:00","2024-04-22 16:00:00","RTG NT: Poincaré schemes","Viktor Burghardt","Workshop / Seminar",Abstract:,https://events.umich.edu/event/117836,"East Hall",3088,"East Hall",,Mathematics,"Department of Mathematics"
112535-21829089,"2024-04-22 16:15:00","2024-04-22 17:30:00",GLNT,"Samuel Mundy (Princeton)","Workshop / Seminar",TBA,https://events.umich.edu/event/112535,"East Hall",3088,"East Hall",,Mathematics,"Department of Mathematics"
120045-21843982,"2024-04-24 16:00:00","2024-04-24 17:20:00","RTG TopGeomDyn Seminar:","Pratyush Sarkar","Workshop / Seminar",TBA,https://events.umich.edu/event/120045,"East Hall",3866,"East Hall",,,"Department of Mathematics"
119736-21843513,"2024-04-24 16:00:00","2024-04-24 17:00:00","DEX Specs: A Mean Field Approach to DeFi Currency Exchanges","April Nellis, UM","Workshop / Seminar","We investigate the behavior of liquidity providers (LPs) by modeling a decentralized cryptocurrency exchange (DEX) based on Uniswap v3. LPs with heterogeneous characteristics choose optimal liquidity positions subject to uncertainty regarding the size of exogenous incoming transactions and the prices of assets in a centralized market. They engage in a game among themselves, and the resulting liquidity distribution determines the exchange rate dynamics and potential arbitrage opportunities of the pool. We calibrate the distribution of LP characteristics based on Uniswap data and the equilibrium strategy resulting from this mean-field game produces pool exchange rate dynamics and liquidity evolution consistent with observed pool behavior. We subsequently introduce Maximal Extractable Value (MEV) bot attackers and develop a Stackelberg game between LPs and bots. This results in more accurate simulated pool exchange rate dynamics and stronger predictive power regarding the evolution of the pool liquidity distribution.
Joint work with Erhan Bayraktar and Asaf Cohen",https://events.umich.edu/event/119736,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
121021-21845713,"2024-04-25 16:00:00","2024-04-25 17:00:00","Differential Equations Seminar: Scalar curvature and codimension 2 collapse","Demetre Kazaras, Michigan State University","Workshop / Seminar","This talk is about the structure of Riemannian 3-manifolds satisfying a lower bound on their scalar curvature. These manifolds are toy models for spatial geometry in general relativity. I will discuss a ""drawstring"" construction, which modifies a manifold near a given curve, reducing its length and incurring only negligible damage to a scalar curvature lower bound. This extends ideas of Basilio-Sormani and Lee-Naber-Neumayer. The drawstrings produce unexpected examples with relevance to a few areas, including the question ""How flat is an isolated gravitational system with very little total mass?"" This is based on joint work with Kai Xu.",https://events.umich.edu/event/121021,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
117830-21840082,"2024-04-29 15:00:00","2024-04-29 16:00:00","RTG NT: Affine Soergel bimodules","Calvin Yost-Wolff","Workshop / Seminar","**** TO BE RESCHEDULED ****
Abstract:",https://events.umich.edu/event/117830,"East Hall",3088,"East Hall",,Mathematics,"Department of Mathematics"
120328-21844574,"2024-09-10 16:00:00","2024-09-10 17:00:00","Ziwet Colloquium Lecture: TBA","June Huh (Princeton University)","Workshop / Seminar",TBA,https://events.umich.edu/event/120328,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
120999-21845657,"2024-10-01 16:00:00","2024-10-01 17:00:00","Colloquium Seminar: TBA","Natasa Pavlovic (UT Austin)","Workshop / Seminar",TBA,https://events.umich.edu/event/120999,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
113879-21831852,"2024-10-08 16:00:00","2024-10-08 17:00:00","Colloquium Seminar: TBA","Tristan Collins (Toronto)","Workshop / Seminar",TBA,https://events.umich.edu/event/113879,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
120788-21845300,"2024-10-22 16:00:00","2024-10-22 17:00:00","Colloquium Seminar: TBA","John Schotland (Yale)","Workshop / Seminar",TBA,https://events.umich.edu/event/120788,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"
120272-21845113,"2024-11-21 16:00:00","2024-11-21 17:00:00","Differential Equations Seminar: tba","Ian Tice (Carnegie Mellon U.)","Workshop / Seminar",tba,https://events.umich.edu/event/120272,"East Hall",4088,"East Hall",,Mathematics,"Department of Mathematics"
115113-21834064,"2025-01-10 16:00:00","2025-01-10 17:00:00","Marjorie Lee Brown Colloquium: TBA","Federico Ardila","Workshop / Seminar",TBA,https://events.umich.edu/event/115113,"East Hall",1360,"East Hall",,Mathematics,"Department of Mathematics"