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SUMMARY:Geometric invariant theory for graded unipotent group actions and 
 applications - Kirwan\, F (University of Oxford)
DTSTART:20150720T130000Z
DTEND:20150720T140000Z
UID:TALK60160@talks.cam.ac.uk
CONTACT:42080
DESCRIPTION:Mumford's geometric invariant theory (GIT) provides a method f
 or constructing (projective completions of) quotient varieties for linear 
 actions of complex reductive groups on affine and projective varieties\, a
 nd has many applications (for example in the construction of moduli spaces
  in algebraic geometry). Mumford's GIT can be extended to actions of linea
 r algebraic groups which are not necessarily reductive\, but many of the n
 ice properties belonging to reductive GIT no longer hold for non-reductive
  actions. The aim of this talk is to describe conditions under which these
  properties still hold for suitable non-reductive actions\, and to discuss
  some applications\n
LOCATION:Seminar Room 2\, Newton Institute Gatehouse
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