Qing Xiang visited Caltech

from the University of Delaware (January 5 - February 4, 2004).

Qing presented his first lecture Thursday, January 15, 2004
"The invariant factors of the incidence matrices of points and subspaces in PG(n,q) and AG(n,q)"
See some of Qing's notes on this lecture
His second lecture was presented Thursday, January 29, 2004
"On Mathon's construction of maximal arcs in Desarguesian planes"
See some of Qing's notes at this lecture

Qing's wife Susan and son Andrew joined him for a weekend which included a visit to Santa Barbara.

Above is Rick's wife Kathy with Qing and his family.