Qing Xiang has been awarded a new three-year grant starting July 1, 2010 by the combinatorics program in the Division of Mathematical Sciences of NSF.

This grant will support Professor Qing Xiang and his collaborators to study a diverse set of problems concerning incidence matrices, additive combinatorics, difference sets and Hadamard matrices. Incidence matrices are basic mathematical objects which are frequently encountered in various branches of mathematics, computer science and engineering. Difference sets and Hadamard matrices are important objects in combinatorial design theory, which have found many applications in radar, spread-spectrum communications and cryptography.