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SUMMARY:Noncommutative geometry and its relation to General Relativity - J
 ohn Madore (LPT Orsay)
DTSTART:20140425T120000Z
DTEND:20140425T130000Z
UID:TALK52135@talks.cam.ac.uk
CONTACT:Helvi Witek
DESCRIPTION:There are many noncommutative geometries\, which means that th
 e subject can eventually be shown to be useless but never wrong. The versi
 on we favour is most conveniently formulated using an extension of Cartan'
 s moving-frame formalism\, uses a Minkowski-signature metric and has no ne
 ed of a action. The field equations are derived from Jacobi identities. A 
 general introduction will be given to the subject\, in particular when and
  why one might expect problems when forcing coordinates to commute. Briefl
 y will be mentioned the possibility of replacing the hidden manifold of Ka
 luza-Klein theory by a matrix geometry and of blowing up the Big Bang.\nCo
 ntact will be made with quantum gravity. Last but certainly not least some
  open problems will be discussed.
LOCATION:Pavilion B Potter Room (B1.19)
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