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SUMMARY:Lattice cohomology in topology and singularity theory
DTSTART:20141208T151500
DTEND:20141208T170000
DTSTAMP:20260916T010330Z
UID:c425f523c5eecf6e3bc2eaa46fe9502e084185c67e6431a3624d7d5d
CATEGORIES:Conferences - Seminars
DESCRIPTION:András Némethi (Budapest\, MTA)\nLinks of complex normal su
 rface singularities are graph manifolds\nwith negative definite intersecti
 on forms. To such a 3-manifold we construct a\ncohomology theory\, called 
 the `lattice cohomology'. It is a bridge between\ntopological and analytic
 al invariants of the singularity. Its Euler characteristic is the\nSeiberg
 -Witten invariant of the link\, conjecturally it  coincides with the\nHee
 gaard Floer homology of the link\; on the other hand it has subtle connect
 ion with\nthe  cohomology of analytic line bundles on the resolution (e.g
 . with the\ngeometric genus). These connections are concentrated around se
 veral key conjectures.\nWe discuss these conjectures\, results and several
  examples.
LOCATION:MAA331 http://plan.epfl.ch/?lang=fr&room=MA+A331
STATUS:CONFIRMED
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