Speaker
Avi Berman
(Technion)
Description
Laffey and Smigos proved that every 2x2 integer nonnegative PSD matrix can be decomposed as BB^t, where B is integer nonnegative and the number of columns of B is not more than 11. We show that 11 can be reduced to 10 ans suggest as an open problem the conjecture that it can be reduced to 9.
Author
Avi Berman
(Technion)