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SUMMARY:A modified least action principle allowing mass concentrations for
  the early universe reconstruction problem - Brenier\, Y (Nice)
DTSTART:20100906T124500Z
DTEND:20100906T134500Z
UID:TALK26080@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We discuss the reconstruction problem for the early universe\,
  following Peebles and Frisch and coauthors. The model is given by the pre
 ssure-less gravitational Euler Poisson system\, with time dependent coeffi
 cients taking into account general relativity features. (This amounts to c
 onsidering Newtonian gravation in an Einstein de Sitter background.) The s
 tandard least action principle is unable to take into account mass concent
 ration effects. We show that a modification of the action is possible whic
 h allows dynamical concentrations. (detailed discussion available on HAL p
 re-print server.)
LOCATION:Seminar Room 1\, Newton Institute
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