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DTSTAMP:20260125T201944
DTSTART;TZID=America/Detroit:20260226T154500
DTEND;TZID=America/Detroit:20260226T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Learning Seminar: Stable irrationality of cubic threefolds
DESCRIPTION:Explain Voisin’s work\, which together with the non-algebraicity of the minimal class on the intermediate Jacobian implies stable irrationality of very general cubic threefolds.
UID:144456-21895382@events.umich.edu
URL:https://events.umich.edu/event/144456
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20260114T105643
DTSTART;TZID=America/Detroit:20260226T160000
DTEND;TZID=America/Detroit:20260226T170000
SUMMARY:Workshop / Seminar:DE Seminar: Nonuniqueness of solutions to the two-dimensional Euler equations with integrable vorticity
DESCRIPTION:Yudovich established the well-posedness of the two-dimensional incompressible Euler equations for solutions with bounded vorticity. DiPerna and Majda proved the existence of weak solutions with vorticity in L^p ( p > 1).  A celebrated open question is whether the uniqueness result can be generalized to solutions with L^p vorticity. In this talk\, we resolve this question in negative for some p > 1. To prove nonuniqueness\, we devise a new convex integration scheme that employs non-periodic\, spatially-anisotropic perturbations\, an idea that was inspired by our recent work on the transport equation. To construct the perturbation\, we introduce a new family of building blocks based on the Lamb-Chaplygin dipole. This is a joint work with Elia Bruè and Maria Colombo.
UID:141830-21889471@events.umich.edu
URL:https://events.umich.edu/event/141830
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4088
CONTACT:
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