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SUMMARY:Yann Rollin (Université de Nantes)
DTSTART:20231027T150000Z
DTEND:20231027T161500Z
DTSTAMP:20260423T024750Z
UID:CIRGET/107
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CIRGET/107/"
 >Moment maps in Symplectic geometry and applications to PL symplectic geom
 etry</a>\nby Yann Rollin (Université de Nantes) as part of CRM - Séminai
 re du CIRGET / Géométrie et Topologie\n\nLecture held in PK-5115.\n\nAbs
 tract\nClassical results of symplectic geometry\, like Darboux theorem\, a
 re open problems in piecewise linear symplectic geometry. This is notoriou
 sly due to the fact that diffeomorphisms flow techniques fail in this cont
 ext.\n\nI will discuss certain moment map geometries of interest\, with ap
 plications to piecewise linear symplectic geometry. In particular the spac
 e of symplectic diffeomorphisms of the torus T^4 can be interpreted as the
  vanishing locus of a certain hyperKähler moment maps. An interesting mom
 ent map flow can be deduced as a key tool to compare homotopy properties o
 f the groups of diffeomorphisms and symplectomorphisms of the torus T^4.\n
LOCATION:https://researchseminars.org/talk/CIRGET/107/
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