Vidit Nanda, Turing Research Fellow, University of Oxford
Wed 05 Jul 2017, 14:00 - 15:00

If you have a question about this talk, please contact: Steph Smith (ssmith32)

Every finite regular CW complex is, ipso facto, a stratified space when filtered by skeleta. In this talk, Vidit will outline a method to discover the canonical (i.e., coarsest possible) stratification into manifolds of such a complex that is compatible with its underlying cell structure. The construction proceeds by first localizing and then resolving a sequence of cosheaves which capture local cohomology at every cell. The result is a sequence of categories whose limit recovers the desired strata via its (isomorphism classes of) objects. As a bonus, the entire process is algorithmic and amenable to efficient computation.