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UID:466@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20141121T093000
DTEND;TZID=Europe/Paris:20141121T103000
DTSTAMP:20250118T132804Z
URL:https://www.i2m.univ-amu.fr/evenements/a-categorified-view-of-the-alex
 ander-invariant/
SUMMARY:Liam Watson  (University of Glasgow): A categorified view of the Al
 exander invariant
DESCRIPTION:Liam Watson : Alexander invariants are classical objects in low
 -dimensional topology stemming from a natural module structure on the homo
 logy of the universal abelian cover. This is the natural setting in which 
 to define the Alexander polynomial of a knot\, for example\, and given tha
 t this polynomial arises as graded Euler characteristic in knot Floer homo
 logy\, it is natural to ask if there is a Floer-theoretic counterpart to t
 he Alexander invariant. There is: This talk will describe a TQFT due to Do
 naldson\, explain how it is categorified by bordered Heegaard Floer homolo
 gy\, and from this place the Alexander invariant in a Heegaard Floer setti
 ng. This is joint work with Jen Hom and The Lidman.
ATTACH;FMTTYPE=image/jpeg:https://www.i2m.univ-amu.fr/wp-content/uploads/2
 014/11/Liam_Watson-2020.jpg
CATEGORIES:Groupe de travail,Singularités
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