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DTSTART:20070311T020000
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BEGIN:VEVENT
DTSTAMP:20261014T132755
DTSTART;TZID=America/Detroit:20261030T040000
DTEND;TZID=America/Detroit:20261030T050000
SUMMARY:Workshop / Seminar:Topology seminar: Tight surgeries on torus knots
DESCRIPTION:Abstract: We give a complete classification of tight contact structures on every surgery along torus knots\, which provides the first such classification on an infinite family of non-trivial knots and makes progress on the project of understanding tight contact structures on Seifert fibered spaces. The main tools are the classification of non-loose torus knots\, bordered contact invariants\, and non-thickenable tori in knot complements. In this talk\, we will discuss the role played by recently developed connections between Heegaard Floer invariants and contact geometry in the classification.
UID:149564-21906708@events.umich.edu
URL:https://events.umich.edu/event/149564
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 3866
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260728T195313
DTSTART;TZID=America/Detroit:20261113T160000
DTEND;TZID=America/Detroit:20261113T170000
SUMMARY:Workshop / Seminar:Topology seminar: TBA
DESCRIPTION:Abstract: TBA
UID:149640-21906837@events.umich.edu
URL:https://events.umich.edu/event/149640
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 3866
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260726T221338
DTSTART;TZID=America/Detroit:20261120T040000
DTEND;TZID=America/Detroit:20261120T050000
SUMMARY:Workshop / Seminar:Topology seminar: TBA
DESCRIPTION:Abstract: TBA
UID:149563-21906707@events.umich.edu
URL:https://events.umich.edu/event/149563
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 3866
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260916T102118
DTSTART;TZID=America/Detroit:20261204T160000
DTEND;TZID=America/Detroit:20261204T170000
SUMMARY:Workshop / Seminar:Topology seminar: Canonical bases of skein algebras\, and categorification
DESCRIPTION:Abstract: For an oriented surface S\, the Kauffman bracket skein algebra of S is an algebra generated by isotopy classes of framed links in the thickened surface S x (-1\,1) modulo skein relations\, and it quantizes the SL2 character variety of S. I will review various vector space bases of the skein algebra\, and discuss the problem on the positivity of structure constants. I will spend enough time to give an elementary introduction\, and towards the end I will briefly present recently known results\, from quantum cluster algebras and mirror symmetry\, from foams\, and from quantized K-theoretic Coulomb branches. I hope to focus more on the last one\, which is based on my joint work 2505.13332 with Dylan Allegretti and Peng Shan\, which gives a monoidal categorification of the skein algebra of a genus zero punctured surface.
UID:152188-21913200@events.umich.edu
URL:https://events.umich.edu/event/152188
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 3866
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260827T085943
DTSTART;TZID=America/Detroit:20261211T160000
DTEND;TZID=America/Detroit:20261211T170000
SUMMARY:Workshop / Seminar:Topology seminar: TBA
DESCRIPTION:Abstract: TBA
UID:151001-21910703@events.umich.edu
URL:https://events.umich.edu/event/151001
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 3866
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260923T142226
DTSTART;TZID=America/Detroit:20270129T160000
DTEND;TZID=America/Detroit:20270129T170000
SUMMARY:Workshop / Seminar:Topology Seminar: TBA
DESCRIPTION:Abstract: TBA
UID:152761-21914477@events.umich.edu
URL:https://events.umich.edu/event/152761
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 3866
CONTACT:
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