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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:
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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:Workshop,In Person,Culture,Arts For All,Art
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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BEGIN:VEVENT
DTSTAMP:20260324T085405
DTSTART;TZID=America/Detroit:20260128T160000
DTEND;TZID=America/Detroit:20260128T170000
SUMMARY:Meeting:Unpacking the News with U-M Faculty Experts
DESCRIPTION:Each session offers a space to pause\, sort out what’s happening\, and engage in thoughtful\, civil discussion with peers. Bring your questions\, your curiosity\, and your perspective—no preparation required.\n\nJosh Pasek is Professor of Communication & Media and Political Science\, Faculty Associate at the Center for Political Studies\, Institute for Social Research\, and Associate Director of the Michigan Institute for Data Science at the University of Michigan.
UID:143802-21894055@events.umich.edu
URL:https://events.umich.edu/event/143802
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Free,Civic Engagement,Civic Learning,Culture,Education,In Person,Media,Politics,Social Impact,Talk,Undergraduate
LOCATION:Michigan Union - Pond Room
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20251114T154427
DTSTART;TZID=America/Detroit:20260128T170000
DTEND;TZID=America/Detroit:20260128T180000
SUMMARY:Meeting:LSA Virtual Q&A for Prospective High School Students
DESCRIPTION:LSA Recruitment is hosting an hour-long virtual LSA Q&A session where prospective high school students can ask LSA and Michigan Learning Community (MLC) student ambassadors common questions about being an LSA student at Michigan. Common questions include but are not limited to majors/minors\, LSA programs\, MLCs\, campus resources\, living in Ann Arbor\, studying abroad\, etc. The session is intended for first-year student applicants and their guests. If you are interested\, sign up for a session below. Note that sessions are scheduled for the Eastern Time Zone.\n\nRegister Here: https://myumi.ch/rAMgG
UID:117080-21891197@events.umich.edu
URL:https://events.umich.edu/event/117080
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Virtual,Prospective Student,free,Prospective Undergraduate Students
LOCATION:Off Campus Location
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260116T084714
DTSTART;TZID=America/Detroit:20260128T170000
DTEND;TZID=America/Detroit:20260128T180000
SUMMARY:Other:Transfer Transitions: Community Connections
DESCRIPTION:Welcome\, Winter 2026 transfer students! Join us for Transfer Transitions: Community Connections\, an event for you to connect with several identity-based programs and offices around campus. Come to chat with Blavin Scholars\, CEW+\, LSA First-Generation Commitment\, International Center\, the Non- and Post-Traditional Student Community Group (NPTCG)\, Trotter Multicultural Center\, and the Office of Academic Multicultural Initiatives (OAMI). \n\nWhile this event is geared toward new transfer students\, all U-M transfer students are welcome and encouraged to attend. Please register through the Sessions link to get free food\, and come anytime between 5-6 PM.
UID:142967-21891863@events.umich.edu
URL:https://events.umich.edu/event/142967
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Transfer Students,Transfer Student Center,transfer
LOCATION:LSA Building - 1040
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260128T120259
DTSTART;TZID=America/Detroit:20260128T170000
DTEND;TZID=America/Detroit:20260128T180000
SUMMARY:Other:Wolverine Support Network Mass Meeting 
DESCRIPTION:Join us January 28th from 5–6 PM in East Quad\, Room B830 for our upcoming mass meeting! Come learn what WSN has planned\, get involved\, and connect with an amazing community on campus! 🧠✨\nAll are welcome...we can't wait to see you there!
UID:144607-21895562@events.umich.edu
URL:https://events.umich.edu/event/144607
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:
LOCATION:East Quad B830
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260105T135040
DTSTART;TZID=America/Detroit:20260128T173000
DTEND;TZID=America/Detroit:20260128T193000
SUMMARY:Reception / Open House:2026 First-Gen Winter Community Dinner
DESCRIPTION:Join the First-Gen Gateway\, Barger Leadership Institute\, and MLEAD for the First-Gen Winter Community Dinner! At this event\, you will have the opportunity to learn more about what it means to be a leader and leadership opportunities on campus!
UID:143216-21892445@events.umich.edu
URL:https://events.umich.edu/event/143216
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:First Gen,First Generation,Leadership
LOCATION:Michigan League - Ballroom
CONTACT:
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