22/11/2007, 16:00 — 17:00 — Sala P3.10, Pavilhão de Matemática Wojtek Chacholski, KTH Stockholm
How to quantify the complexity of fibrations of topological spaces
To quantify something means to compare it with something else which is presumed to be more fundamental. In my talk I will compare taking extensions by fibrations to the operations of homotopy push-out. I will reformulate the nilpotence theorem of Devinats-Hopkins-Smith in these terms. The aim is to give an overview of what is known and what is not about Dror Farjoun's cellularity of topological spaces.
