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SUMMARY:Geometry and Topology Seminar  – Federico Ardila (Queen Mary)
DESCRIPTION:Federico Ardila (Queen Mary). Polytopes from amplitudes.\nAbst
 ract: Scattering amplitudes and other quantities in physics are given by 
 enormous\, intricate sums that are very challenging to compute in practice
 \, and often involve mysterious\, extensive cancellations. A powerful tech
 nique to explain this phenomenon is to encode the combinatorial complexity
  of these sums in a geometric object. I will introduce some of the beautif
 ul polytopes that arise and discuss their rich combinatorial structure. Ou
 r two central examples will be the associahedron (first discovered in homo
 topy theory and rediscovered in scattering amplitudes) and the cosmohedron
  (first discovered in cosmology and seeking a homotopy theoretic interpret
 ation).\nMy talk will discuss joint work with Marcelo Aguiar and {Nima Ark
 ani-Hamed\, Carolina Figueiredo\, and Francisco Vazão}\, and will not ass
 ume previous knowledge of this topic.\nMore information on the GT seminar 
 website\n 
URL:https://www.imperial.ac.uk/events/210569/geometry-and-topology-seminar-
 federico-ardila-queen-mary/
DTSTART;TZID=Europe/London:20260612T133000
DTEND;TZID=Europe/London:20260612T143000
LOCATION:130\, Huxley Building\, South Kensington Campus\, Imperial College
  London\, London\, SW7 2AZ\, United Kingdom
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