**Date & Time:** Thursday, September 19, 2013, 14:00- 15:00.

**Venue:** Ramanujan Hall

**Title:** Some new upper bounds on binary code size

**Speaker:** Murali K. Srinivasan, IIT Bombay

**Abstract:** We discuss the paper of Gijswijt, Mittelmann, and Schrijver giving
new upper bounds on binary code size. This involves explicit block
diagonalization of the commutant of the hyperoctahedral group action on pairs
of subsets. This is reduced to explicit block diagonalization of the commutant
of the symmetric group action on subsets (which we have already seen) using
some elementary multilinear algebra.