Séminaire Analyse
organisé par l'équipe Analyse
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Yingtong Hou
BPHZ renormalisation of invariant measures via multi-indices
5 mars 2026 - 11:00Salle de conférences IRMA
In this talk, we provide a method to obtain the renormalised measures in quantum field theory by renormalising the cumulant expansion of the original measures. After reviewing the main ingredients of renormalisation: cumulant expansion, Wick renormalisation, Feynman diagrams, we introduce our approach based on BPHZ renormalisation via multi-indices which are combinatorial objects originating from describing scalar-valued singular SPDEs. To automate the renormalisation procedure, we propose a multi-index counterpart of the Hopf-algebraic program initiated by Connes and Kreimer for the renormalisation of Feynman diagrams. This is a joint work with Yvain Bruned. -
Jacques-Arthur Weil
TBA
12 mars 2026 - 11:00Salle de conférences IRMA
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Florent Dupont
TBA
19 mars 2026 - 11:00Salle de conférences IRMA
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András Vasy
TBA
26 mars 2026 - 11:00Salle de conférences IRMA
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Palmirotta Gwenda
TBA
2 avril 2026 - 11:00Salle de conférences IRMA
TBA -
Stéphane Mischler
TBA
9 avril 2026 - 11:00Salle de conférences IRMA