University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > A modified least action principle allowing mass concentrations for the early universe reconstruction problem

  Browse A-Z

Log in

University Account External (via Google)

🔐 Log In

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

ℹī¸ Information

A modified least action principle allowing mass concentrations for the early universe reconstruction problem

Download to your calendar using vCal

If you have a question about this talk, please contact Mustapha Amrani .

Partial Differential Equations in Kinetic Theories

We discuss the reconstruction problem for the early universe, following Peebles and Frisch and coauthors. The model is given by the pressure-less gravitational Euler Poisson system, with time dependent coefficients taking into account general relativity features. (This amounts to considering Newtonian gravation in an Einstein de Sitter background.) The standard least action principle is unable to take into account mass concentration effects. We show that a modification of the action is possible which allows dynamical concentrations. (detailed discussion available on HAL pre-print server.)

This talk is part of the Isaac Newton Institute Seminar Series series.

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

AI+Pizza LR3B, Inglis building. Zoom only: https:

Other talks

Title to be confirmed Title to be confirmed Title TBC Cultural evolution creates language-like structure: from humans to humpback whales and beyond Title to be confirmed Title to be confirmed
 

Š 2006-2025 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity