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BEGIN:VEVENT
DTSTAMP:20260122T101228
DTSTART;TZID=America/Detroit:20260128T150000
DTEND;TZID=America/Detroit:20260128T160000
SUMMARY:Workshop / Seminar:Department Colloquium | Programmable Topology in Hybrid Light-Matter Systems
DESCRIPTION:Quantum geometry has emerged as a new framework that unites different disciplines and underpins novel transport and nonlinear phenomena in topological states of matter. In this colloquium\, I will discuss an emerging system for topological studies: designable hybrid light-matter fluids. By integration of 2D material excitations — such as moiré excitons and Fermi polarons — with engineered photonic crystals\, we create a platform where topology can be designed and dynamically controlled.
UID:144293-21895126@events.umich.edu
URL:https://events.umich.edu/event/144293
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Physics,Science
LOCATION:West Hall - 340
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20251202T115505
DTSTART;TZID=America/Detroit:20260128T150000
DTEND;TZID=America/Detroit:20260128T160000
SUMMARY:Other:Grants office hours: Get support applying for one of SSC's Sustainability Grants!
DESCRIPTION:Drop in to our weekly open office hours to learn and get support applying to our Planet Blue Student Innovation Fund (PBSIF) or Social and Environmental Sustainability Grant (SES).
UID:138848-21890497@events.umich.edu
URL:https://events.umich.edu/event/138848
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Environment,Sustainability
LOCATION:Off Campus Location
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260116T163249
DTSTART;TZID=America/Detroit:20260128T150000
DTEND;TZID=America/Detroit:20260128T160000
SUMMARY:Lecture / Discussion:Privacy for Populations at Risk: Supporting Journalists Facing Attacks in the Digital Age
DESCRIPTION:Celebrating International Data Privacy Day!\n\nElodie Vialle\, an international journalist and human rights activist\, will discuss how journalists—particularly women journalists and journalists from marginalized communities—are increasingly targeted in online spaces\, from coordinated harassment to surveillance and AI-amplified attacks. Drawing on real-world cases\, the session will explore practical responses to mitigate harm while safeguarding journalistic work and freedom of expression.\n\nLynette Clemetson\, Charles R. Eisendrath Director of Wallace House\, will facilitate Q&A time after the keynote presentation.\n\nJoin us on Zoom on the day of the event: https://umich.zoom.us/j/97875254127\n\nAdd this event to your Google calendar: https://calendar.google.com/calendar/u/0/r/eventedit/copy/MmtxZHR1aW5raGw4bGZkOWg0N3E5NGNoamYgdW1pY2guZWR1X2ZkczI0Z2V2cGE0MnY5NTc2bG5wZTJjbWxrQGc
UID:143915-21894254@events.umich.edu
URL:https://events.umich.edu/event/143915
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Academic Technology At Michigan,Data Science,digital,Digital Culture,Digital Cultures,Digital Studies,digital technology,Discussion,Ethics,Free,Human Rights\, Sustainability\, Social Impact,Humanities,Information and Technology,information policy,information technology,Interdisciplinary,internet security,it,Journalism,Law,michigan it,privacy,Public Policy,Social Impact,Social Justice,Social Media,Social Sciences,Sociology,Talk,technology,Webinar
LOCATION:Off Campus Location
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260125T112641
DTSTART;TZID=America/Detroit:20260128T150000
DTEND;TZID=America/Detroit:20260128T160000
SUMMARY:Workshop / Seminar:Trees and SL2
DESCRIPTION:A common theme in mathematics is to understand algebraic objects using their actions on geometric spaces. Bass—Serre theory is one instance of this approach where one studies groups via their actions on trees. I will give an introduction to the simplest case of Bass—Serre theory and build a dictionary between gluing of spaces\, amalgamation of groups\, and actions on trees. This dictionary gives us a surprising amount of information about the structure of groups\, especially about their torsion subgroups. I will demonstrate this by applying the theory to SL2(Z)\, SL2(Q_p)\, and SL2(F_p((t))).
UID:144436-21895352@events.umich.edu
URL:https://events.umich.edu/event/144436
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - EH3866
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260114T220853
DTSTART;TZID=America/Detroit:20260128T153000
DTEND;TZID=America/Detroit:20260128T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: On the P=C conjecture
DESCRIPTION:I will introduce the P=C conjecture which is an analogue of the P=W conjecture in the setting of a del Pezzo surface S. The main character of the conjecture is the moduli space M of one-dimensional sheaves on S. The perverse filtration records the topology of the Hitchin-type fibration\, while the Chern filtration records the shape of tautological relations. The perverse filtration is of particular interest because it conjecturally categorifies the Gopakumar-Vafa invariants of a local Calabi-Yau 3-fold. This is a joint work with Y. Kononov\, M. Moreira\, W. Pi.
UID:141272-21888524@events.umich.edu
URL:https://events.umich.edu/event/141272
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260112T153641
DTSTART;TZID=America/Detroit:20260128T160000
DTEND;TZID=America/Detroit:20260128T170000
SUMMARY:Workshop / Seminar:Convergence Analysis of Discrete Sampling in Continuous-Time Reinforcement Learning and High-Dimensional Numerical Integration
DESCRIPTION:Stochastic policies (also known as relaxed controls) are widely used in continuous-time Reinforcement Learning (RL) algorithms. However\, a critical disconnect remains between theory and practice. The theoretical aggregated dynamics\, driven by averaged coefficients\, provide a convenient basis for deriving RL algorithms but cannot be directly implemented. Physical execution requires the agent to sample concrete actions from the policy. Since continuously sampling independent actions poses significant mathematical and computational challenges\, practical implementation must rely on discrete sampling. Yet\, for general diffusion processes\, the accuracy of such discretely sampled dynamics has lacked rigorous theoretical justification.\n\nIn this talk\, I will bridge this gap by introducing and rigorously analyzing a policy execution framework that samples actions from a stochastic policy at discrete time points and implements them as piecewise constant controls. We prove that as the sampling mesh size tends to zero\, the controlled state process converges weakly to the dynamics with coefficients aggregated according to the stochastic policy. We explicitly quantify the convergence rate based on the regularity of the coefficients and establish an optimal first-order convergence rate for sufficiently regular coefficients. Additionally\, we prove a 1/2-order weak convergence rate that holds uniformly over the sampling noise with high probability\, and establish a 1/2-order pathwise convergence for each realization of the system noise in the absence of volatility control. Building on these results\, we analyze the bias and variance of various policy evaluation and policy gradient estimators based on discrete-time observations. Our results provide theoretical justification for the exploratory stochastic control framework in [H. Wang\, T. Zariphopoulou\, and X.Y. Zhou\, J. Mach. Learn. Res.\, 21 (2020)\, pp. 1-34].\n\nFinally\, I will also briefly discuss my research on Quasi-Monte Carlo sampling methods for efficient computation in high-dimensional numerical integration.
UID:143763-21893983@events.umich.edu
URL:https://events.umich.edu/event/143763
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:Off Campus Location
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260115T181513
DTSTART;TZID=America/Detroit:20260128T160000
DTEND;TZID=America/Detroit:20260128T180000
SUMMARY:Workshop / Seminar:Make Your Own Flyer Workshops
DESCRIPTION:*No prior experience required\, all supplies will be provided\"\n\nAre you curious about DIY art and culture? These art-making drop in workshops offer a hands-on way to engage with the ephemera of underground and independent music scenes featured in the Flyover Country exhibition. You will have the opportunity to make the poster for a dream show with a lineup of your favorite bands\, draw a protest flyer\, put together a collage art piece\, or even design a flyer for a real upcoming event you're planning.\nA button maker will be available for anyone who wants to turn a design into a punk-inspired button pin\, all participants will receive a free handout to take home with them.\n\nJanuary 28th workshop participants are also welcome to tape their finished flyers to a shared display wall in the gallery if they choose\, becoming part of the exhibit while it’s on view.  \n\nFree coffee\, tea\, and treats will be provided at both workshops on a first-come\, first-served basis.
UID:143980-21894368@events.umich.edu
URL:https://events.umich.edu/event/143980
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Art,Arts For All,Culture,In Person,Workshop
LOCATION:Shapiro Library - Shapiro Gallery, Third Floor, Room 3160
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260124T210402
DTSTART;TZID=America/Detroit:20260128T160000
DTEND;TZID=America/Detroit:20260128T170000
SUMMARY:Workshop / Seminar:Probability/Analysis Circle: Change of Variables - From Symmetric Matrices to Eigenvalues
DESCRIPTION:This is the second meeting of the Probability/Analysis Circle\, a new event for juniors\, seniors\, and master’s students interested in probability and analysis. Eigenvalues of a symmetric matrix are complicated functions of the matrix’s entries. If we view the mapping from the entries of a symmetric matrix to its eigenvalues and eigenvectors as a change of variables\, what is the Jacobian? We will compute it for the 2x2 case and discuss the general nxn case. Then\, we’ll use this formula to explore the distribution of random eigenvalues for certain random symmetric matrices. Students are expected to know multivariable calculus.
UID:144430-21895346@events.umich.edu
URL:https://events.umich.edu/event/144430
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4088
CONTACT:
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