Thursday, 18 march 2010
"Feynman graphs and compact symmetric multicategories"
Joachim Kock(Departament de Matemàtiqes. Universitat Autònoma de Barcelona)
I will explain the formal construction of a category of Feynman graphs, featuring etale maps. The construction is based on and motivated by a notion of compact symmetric multicategory --- the category bears the same relation to this notion as the category of finite linear orders bears to categories --- but it is expected that the category may also be useful in quantum field theory. (This is joint work with André Joyal.)
Seminario de Física TeóricaFacultad de Ciencias Universidad de Zaragoza