Kathryn Hare (University of Waterloo)
Title:  Sidon and other interpolation sets

Abstract:  In this talk we will look at the relationship between Sidon sets
in \Z and other classes of interpolation sets.  We are particularly
interested in two open problems:  Is every Sidon set a finite union of I_0
sets?  Can a Sidon set be dense in the Bohr compactification of \Z?  We will
show that if it can be resolved whether every Sidon set is a set of zero
discrete harmonic density, then one of these two problems can be answered.