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X-FROM-URL:https://eom.sdu.dk/events/ical/c3d10a34-fbc4-44ce-ab79-048462da
 0797
X-WR-CALNAME:QM Research Seminar: The Epstein-Glaser-Brunetti-Fredenhagen 
 renormalisation for pseudodifferential operators
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TZID:Europe/Copenhagen
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DTSTAMP:20260720T032009Z
DTSTART:20261028T030000
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DESCRIPTION:[b]Speaker: Arne Hofmann[/b] (University of Göttingen) [nl][nl
 ]\n[b]Abstract:[/b][nl]\nIn 2000\, Brunetti and Fredenhagen built on the 
 causal perturbation theory of Epstein and Glaser to prove the renormalisa
 bility of scalar field theory on curved spacetimes. Their construction wa
 s criticized in subsequent publications by Hollands and Wald for failing 
 to satisfy local covariance. I will show that with appropriate modificati
 ons\, local covariance can be achieved in the Brunetti-Fredenhagen constr
 uction\, for distributions which resemble (classical) pseudodifferential 
 operators. The crucial feature of such distributions is the existence of 
 uniform asymptotic expansions.\n[nl]\n[nl]
DTEND:20240226T150000Z
DTSTAMP:20260720T032009Z
DTSTART:20240226T140000Z
LOCATION:Syddansk Universitet\, Campusvej 55\, 5230\, Odense M
SEQUENCE:0
SUMMARY:QM Research Seminar: The Epstein-Glaser-Brunetti-Fredenhagen renor
 malisation for pseudodifferential operators
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