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SUMMARY:Vincent Humilière (Institut de Mathématiques de Jussieu - Paris 
 Rive Gauche)
DTSTART:20220517T150000Z
DTEND:20220517T160000Z
DTSTAMP:20260423T022626Z
UID:Geolis/84
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Geolis/84/">
 Groups of area preserving homeomorphisms and their simplicity</a>\nby Vinc
 ent Humilière (Institut de Mathématiques de Jussieu - Paris Rive Gauche)
  as part of Geometria em Lisboa (IST)\n\n\nAbstract\nAlbert Fathi proved i
 n the late 70's that the group of volume preserving homeomorphisms of the 
 n-sphere is simple for n at least 3\, but the case of the 2-sphere remaine
 d open until recently. In this talk\, I will present results obtained in s
 everal works with Dan Cristofaro-Gardiner\, Cheuk-Yu Mak\, Sobhan Seyfaddi
 ni and Ivan Smith on the structure of the group of area preserving homeomo
 rphisms of surfaces\, which include in particular a solution of this probl
 em. Even if the considered objects are not smooth (they are just homeomorp
 hisms)\, the tools we use come from symplectic topology.\n
LOCATION:https://researchseminars.org/talk/Geolis/84/
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