Department of Mathematics







Variety of square-zero upper-triangular matrices-II




(Bilkent University)


Abstract: Let k be an algebraically closed field of characteristic 2, A be the polynomial algebra in r variables with coefficients in k, and (M,d) be a finitely generated DG-A-module. Carlsson conjectured that if the homology of M  is nontrivial and finite dimensional as a k-vector space then the dimension of M as a free A-module is greater than or equal to 2^r.  In the second talk, we will continue to discuss the combinatorial method developed by Rothbach to stratify irreducible components of the variety of square-zero upper-triangular matrices. We will also discuss the subvarieties of matrices of submaximal rank in these irreducible components which were investigated by Karagueuzian, Oliver, and Ventura.


Date:  Monday, November 14, 2016

Time: 13.40-14.30

Place: Mathematics Seminar Room, SA-141


All are most cordially invited.
Tea and cookies will be served after the talk.