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CATEGORIES:Partial Differential Equations seminar
SUMMARY:On Modelling Isolated Systems in General Relativit
y - Leonhard Kehrberger (Cambridge)
DTSTART;TZID=Europe/London:20220509T140000
DTEND;TZID=Europe/London:20220509T150000
UID:TALK173765AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/173765
DESCRIPTION:We typically aim to describe physical processes by
mathematical models that suppose that these proce
sses happen in isolation from the rest of the worl
d. In theories such as general relativity\, where
spacetime itself is the unknown\, this becomes a h
ighly non-trivial endeavour.\n\nIn this talk\, I w
ill first discuss various notions of isolated syst
ems in GR and show how they lead to differing pred
ictions on the (in principle measurable) late-time
asymptotics of solutions to Einstein's equations.
\nI will then present a scattering construction of
a class of physical spacetimes that illustrates h
ow the task of modelling an isolated system can be
reduced to understanding the behaviour of the sys
tem under consideration in the infinite past.\n\n(
*no prior knowledge of GR will be assumed*)
LOCATION:CMS\, MR13
CONTACT:Dr Greg Taujanskas
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