BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LMNO · Laboratoire de mathématiques Nicolas Oresme - ECPv6.16.2//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:LMNO · Laboratoire de mathématiques Nicolas Oresme
X-ORIGINAL-URL:https://lmno.unicaen.fr
X-WR-CALDESC:Évènements pour LMNO · Laboratoire de mathématiques Nicolas Oresme
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20270328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20271031T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260528T170000
DTEND;TZID=Europe/Paris:20260528T180000
DTSTAMP:20260521T223209
CREATED:20260429T092341Z
LAST-MODIFIED:20260521T123813Z
UID:89511-1779987600-1779991200@lmno.unicaen.fr
SUMMARY:Colloquium : Mélissa SHERMAN-BENNETT (UC DAVIES)
DESCRIPTION:Salle S3-255 – Bâtiment Sciences 3 \n\n\n\n\n\nThé du Colloquium proposé de 16h30 à 17h00 en salle S3-247 \n\n\n\n\n\n\n\n\nRésumé :  \n\n\n\nScattering amplitudes are functions of substantial interest to high-energy physics. They record the probability that certain particles will interact and « scatter » in a particular way. I’ll discuss the amplituhedron\, a geometric object introduced by Arkan​i-Hamed and Trnka to encode scattering amplitudes. Examples of amplituhedra include cyclic polytopes\, bounded chambers of cyclic hyperplane arrangements\, and the totally nonnegative Grassmannian. Of particular interest from the physics perspective are decompositions of amplituhedra called « tilings »\, roughly analogous to subdivisions of a polytope. I’ll discuss work on tilings of the m=2 amplituhedron (with Parisi and Williams) and the m=4 amplituhedron (with Even-Zohar\, Lakrec\, Parisi\, Tessler and Williams). The work on m=2 reveals rich combinatorics and a surprising connection to the hypersimplex. The work on m=4 resolves one of the initial conjectures of Arkani-Hamed and Trnka relating tilings to scattering amplitudes\, and also connects tilings to the cluster algebra structure on the Grassmannian.
URL:https://lmno.unicaen.fr/evenement/colloquium-melissa-sherman-bennett-uc-davies/
LOCATION:Caen · Campus 2 · Sciences 3 · Salle S3-255\, 6 Boulevard Maréchal Juin\, CAEN\, 14032
CATEGORIES:Colloquium,Séminaire
ATTACH;FMTTYPE=image/jpeg:https://lmno.unicaen.fr/wp-content/uploads/sites/54/2026/03/Recadrer-WP_Bandeau_5-2_1000-4007.jpg
END:VEVENT
END:VCALENDAR