Revisiting Samuel Eilenberg’s notion of external structures on objects in categories

Fred Linton
Monday, July 22, 2013 - from 16:00 to 16:25
We mean to recapitulate an approach to the matter of objects from one category being endowed with structures coming from another one that was being promulgated by S. Eilenberg in the fall of 1962. We'll point out some of its successes and failings, and compare it with other, more recent approaches to the same matter.