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SUMMARY:Putting Infinity on the Grid - David Hilditch (Instituto Superior 
 Técnico\, Lisboa)
DTSTART:20191003T100000Z
DTEND:20191003T110000Z
UID:TALK130801@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:I will talk about an ongoing research program relying on a dua
 l frame approach to treat numerically the field equations of GR (in genera
 lized harmonic gauge) on compactified hyperboloidal slices. These slices t
 erminate at future-null infinity\, and the hope is to eventually extract g
 ravitational waves from simulations there. The main obstacle to their use 
 is the presence of &#39\;infinities&#39\; coming from the compactified coo
 rdinates\, which have to somehow interact well with the assumption of asym
 ptotic flatness so that we may arrive at regular equations for regular unk
 nowns. I will present a new &#39\;subtract the logs&#39\; regularization s
 trategy for a toy nonlinear wave equation that achieves this goal.
LOCATION:Seminar Room 1\, Newton Institute
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