BEGIN:VCALENDAR VERSION:2.0 PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4// BEGIN:VEVENT UID:20251008T153226EDT-9418VojaX2@132.216.98.100 DTSTAMP:20251008T193226Z DESCRIPTION:TITLE / TITRE\n\nBipermutohedral combinatorics\n  \n\nABSTRACT / RÉSUMÉ \n\nThe classical permutohedron plays a central role in the mathema tics were ideas of convexity\, matroid theory and type-A combinatorics ove rlap and intersect. A newer construction\, the bipermutohedron\, has relat ed structures and applications that are still being understood. I will giv e an introduction to this object and describe two ways in which it can be used. One is in matroid combinatorics (with Ardila and Huh) and the other for some geometry of Feynman amplitudes (with Schulze and Walther).\n\nPLA CE / LIEU\n Hybride - UQAM Salle / Room PK-5115\, Pavillon Président-Kenned y\n \n \n ZOOM\n https://uqam.zoom.us/j/83991097253\n DTSTART:20240405T193000Z DTEND:20240405T203000Z SUMMARY:Graham Denham (Western University) URL:/mathstat/channels/event/graham-denham-western-uni versity-356534 END:VEVENT END:VCALENDAR