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UID:7095@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20190318T140000
DTEND;TZID=Europe/Paris:20190318T150000
DTSTAMP:20241120T203418Z
URL:https://www.i2m.univ-amu.fr/evenements/a-knot-invariant-arising-from-b
 ranched-covers-of-s-4/
SUMMARY:Alexandra Kjuchukova (University of Pennsylvania): A knot invariant
  arising from branched covers of S^4
DESCRIPTION:Alexandra Kjuchukova: I'll begin by recalling dihedral branched
  covers of knots in $S^3$. These are covers associated to Fox colorings of
  knots diagrams. Then\, I will describe an analogous picture for surfaces 
 in $S^4$. The surfaces considered are not smoothly embedded\; they admit c
 one singularities. I will give some examples of dihedral covers between fa
 miliar four-manifolds\, e.g. $\\mathbb{CP}^2\\to S^4$\, and I will explain
  how these can be used to define a ribbon obstruction for a class of knots
 .\n\nhttp://www.researchgate.net/profile/Alexandra_Kjuchukova
ATTACH;FMTTYPE=image/jpeg:https://www.i2m.univ-amu.fr/wp-content/uploads/2
 020/01/Alexandra_Kjuchukova.jpg
CATEGORIES:Séminaire,Dynamique et Topologie
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DTSTART:20181028T020000
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