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UID:20260313T152115EDT-1322PvKuHi@132.216.98.100
DTSTAMP:20260313T192115Z
DESCRIPTION:\n\n \n\n✒️TITLE / TITRE \n\nSymmetry and Graph Coloring: Algeb
 raic and Combinatorial Mysteries\n\n📄 ABSTRACT / RÉSUMÉ \n\nThe study of p
 roper colorings of graphs is a longstanding and important area in mathemat
 ics. The Four Color theorem for planar graphs is one famous success\, and 
 this simple problem in cartography launched a vast theory leading to many 
 concrete applications\, as well as to the algebraic study of chromatic pol
 ynomials and symmetric functions\, which also arise in the geometry of Hes
 senberg varieties.\n\nIn 2024\, Hikita announced a proof of the Stanley-St
 embridge Conjecture on e-positivity of certain chromatic symmetric functio
 ns\, which had been open for 32 years. This breakthrough leaves open\, and
  gives rise to\, many followup mysteries. We will discuss the significance
  of the symmetric functions arising in graph colorings\, and give an overv
 iew of some of the important open problems in the area. This discussion wi
 ll include joint work with Joseph Pappe and Kyle Salois\, towards the ques
 tion\, 'When is the chromatic quasisymmetric function symmetric?'\n\n📍 PLA
 CE / LIEU \n	Hybride - UQAM\, Salle / Room PK-5115\, Pavillon Président-Ken
 nedy\n\n \n\n\n	\n		\n			\n				Lien ZOOM Link\n			\n		\n	\n\n
DTSTART:20260313T193000Z
DTEND:20260313T203000Z
SUMMARY:Maria Gillespie  (Colorado State University)
URL:/science/channels/event/maria-gillespie-colorado-s
 tate-university-371854
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