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UID:20250914T153841EDT-5222kAsVOo@132.216.98.100
DTSTAMP:20250914T193841Z
DESCRIPTION:Counting ribbon graphs using quantum field theory.\n\nEnumerati
 on of rooted ribbon graphs started with the work by Tutte in the 1960’s. W
 e call such graphs one-rooted graphs and introduce a notion of more genera
 l N-rooted ribbon graphs. This definition is motivated by the bijective co
 rrespondence we establish between the N-rooted ribbon graphs with e edges 
 and the (e-N+1)-loop Feynman diagrams of a certain quantum field theory. T
 his result is used to obtain explicit expressions and relations for the ge
 nerating functions of N-rooted maps and for the numbers of N-rooted maps w
 ith a given number of edges using the path integral approach applied to th
 e corresponding quantum field theory. This is a joint work with K. Gopala 
 Krishna and Patrick Labelle.\n
DTSTART:20180123T203000Z
DTEND:20180123T213000Z
LOCATION:Room 4336\, CA\, Pav. André-Aisenstadt\, 2920\, ch. de la Tour
SUMMARY:Vasilisa Shramchenko\, Dépt. de mathématiques\, Univ. Sherbrooke
URL:/mathstat/channels/event/vasilisa-shramchenko-dept
 -de-mathematiques-univ-sherbrooke-283974
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