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SUMMARY:Feynman problems for the Klein-Gordon and wave equation - Michal W
 rochna (Utrecht)
DTSTART:20250127T140000Z
DTEND:20250127T150000Z
UID:TALK226267@talks.cam.ac.uk
CONTACT:Dr Greg Taujanskas
DESCRIPTION:The Klein-Gordon or wave equation has rather unusual features 
 if one imposes so-called Feynman asymptotic conditions. It enjoys a theory
  that in some ways resembles elliptic settings: think Fredholm operators\,
  limiting absorption principle\, standing waves\, etc. In this talk I will
  give an overview of this theory and explain how it arises in applications
  at the interface of GR\, QFT and differential geometry. I will then prese
 nt new results on asymptotically Minkowski spaces for Klein-Gordon equatio
 ns with complex mass term that use microlocal estimates in a resolved scat
 tering calculus and mixed classical-semiclassical versions of it. The talk
  is based on joint works with Nguyen Viet Dang (Sorbonne Université)\, Ch
 ristian Gérard (Paris-Saclay) and András Vasy (Stanford).
LOCATION:MR13
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