# Mathematics Colloquia and Seminars

### Categorical diagonalization of the full twist

Algebra & Discrete Mathematics

 Speaker: Matt Hogancamp, Indiana University Related Webpage: http://www.math.indiana.edu/people/profile.phtml?id=mhoganca Location: 1147 MSB Start time: Fri, Oct 23 2015, 2:10PM

I will discuss recent joint work with Ben Elias in which we introduce a theory of diagonalization of functors. Our main application is the diagonalization of the the Rouquier complex associated to full-twist braid, acting on the category of Soergel bimodules. The eigenprojections'' yield categorified Young symmetrizers, which can be used to give a construction of an arbitrarily colored triply-graded link homology theory, and are also important in the categorical representation theory of Hecke algebras. I will mention a beautiful recent conjecture of Gorsky-Rasmussen relating the categorified Young symmetrizers to the flag Hilbert scheme. There is also a relationship with the stable homology of torus links, which was recently investigated by myself and Michael Abel.