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DTSTART:20070311T020000
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BEGIN:VEVENT
DTSTAMP:20260922T115750
DTSTART;TZID=America/Detroit:20260930T153000
DTEND;TZID=America/Detroit:20260930T165000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: Crepant resolutions via stacks
DESCRIPTION:Consider an invariant that behaves nicely for smooth varieties\, such as Euler number\, Betti numbers\, or Hodge numbers. Suppose we want a version of this invariant for singular varieties that sees interesting information about the singularities. I will discuss how this naturally leads to the notion of crepant resolutions of singularities. However\, crepant resolutions (by varieties) are rare in practice. I will discuss joint work with M. Satriano in which we show that crepant resolutions actually exist in broad generality\, as long as one is willing to consider algebraic stacks. Specifically\, any variety with log-terminal singularities admits a crepant resolution by a smooth algebraic stack. As one consequence\, in joint work with J. Huang and M. Satriano\, we obtain a cohomological interpretation for Batyrev's stringy Hodge numbers. This talk will not assume familiarity with stacks.
UID:149657-21906898@events.umich.edu
URL:https://events.umich.edu/event/149657
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260904T215024
DTSTART;TZID=America/Detroit:20261007T153000
DTEND;TZID=America/Detroit:20261007T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: Proof of Miyanishi's conjecture on endomorphisms of varieties
DESCRIPTION:If X is a quasi-projective variety over a field k and f is a birational endomorphism of X that is injective outside a closed subset of codimension at least 2\, we prove that f is an automorphism. This generalizes an old theorem of Ax and proves a conjecture of Miyanishi from 2005. A key step in our proof is a finiteness result on class groups\, which is of interest in its own right.
UID:150891-21910382@events.umich.edu
URL:https://events.umich.edu/event/150891
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260814T013551
DTSTART;TZID=America/Detroit:20261014T153000
DTEND;TZID=America/Detroit:20261014T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: TBA
DESCRIPTION:TBA
UID:150254-21908471@events.umich.edu
URL:https://events.umich.edu/event/150254
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260310T125925
DTSTART;TZID=America/Detroit:20261021T153000
DTEND;TZID=America/Detroit:20261021T165000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: TBA
DESCRIPTION:TBA
UID:146416-21899058@events.umich.edu
URL:https://events.umich.edu/event/146416
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260805T123105
DTSTART;TZID=America/Detroit:20261104T153000
DTEND;TZID=America/Detroit:20261104T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: TBA
DESCRIPTION:TBA
UID:149916-21907370@events.umich.edu
URL:https://events.umich.edu/event/149916
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260729T061726
DTSTART;TZID=America/Detroit:20261111T153000
DTEND;TZID=America/Detroit:20261111T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar
DESCRIPTION:TBA
UID:149641-21906838@events.umich.edu
URL:https://events.umich.edu/event/149641
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260914T144353
DTSTART;TZID=America/Detroit:20261118T153000
DTEND;TZID=America/Detroit:20261118T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: Stable map resolutions of Richardson varieties
DESCRIPTION:Given a circle action S on a projective variety X\, we introduce the \"stable map quotient\" using Kontsevich's space of stable maps of curves. In the case that X is a Richardson variety (the intersection of a Schubert with an opposite Schubert variety)\, generally very singular\, the quotient is nonetheless smooth! I'll use this to give a log resolution of Richardson varieties\, and describe the dual simplicial complex to the anticanonical sncd boundary.
UID:152133-21913121@events.umich.edu
URL:https://events.umich.edu/event/152133
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260730T124142
DTSTART;TZID=America/Detroit:20261202T153000
DTEND;TZID=America/Detroit:20261202T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: TBA
DESCRIPTION:TBA
UID:149688-21906955@events.umich.edu
URL:https://events.umich.edu/event/149688
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260807T130040
DTSTART;TZID=America/Detroit:20261209T153000
DTEND;TZID=America/Detroit:20261209T165000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar -- TBA
DESCRIPTION:TBA
UID:149995-21907793@events.umich.edu
URL:https://events.umich.edu/event/149995
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260627T181224
DTSTART;TZID=America/Detroit:20270113T153000
DTEND;TZID=America/Detroit:20270113T170000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar: TBA
DESCRIPTION:TBA
UID:149136-21905811@events.umich.edu
URL:https://events.umich.edu/event/149136
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260716T122023
DTSTART;TZID=America/Detroit:20270120T153000
DTEND;TZID=America/Detroit:20270120T165000
SUMMARY:Workshop / Seminar:Algebraic Geometery Seminar: TBA
DESCRIPTION:TBA
UID:149437-21906419@events.umich.edu
URL:https://events.umich.edu/event/149437
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260923T112532
DTSTART;TZID=America/Detroit:20270317T153000
DTEND;TZID=America/Detroit:20270317T170000
SUMMARY:Workshop / Seminar:Michigan Lectures in Algebraic Geometry
DESCRIPTION:TBA
UID:152721-21914428@events.umich.edu
URL:https://events.umich.edu/event/152721
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260729T143054
DTSTART;TZID=America/Detroit:20270331T153000
DTEND;TZID=America/Detroit:20270331T165000
SUMMARY:Workshop / Seminar:Algebraic Geometry Seminar -- TBA
DESCRIPTION:TBA
UID:149661-21906908@events.umich.edu
URL:https://events.umich.edu/event/149661
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
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