Patrick Eberlein from the University of North Carolina at Chapel Hill will be the guest in the Lecture Series in the Mathematical Sciences at 3 p.m. tomorrow (Friday, Sept. 29) in 372 Jabara Hall. His talk is titled "Growth exponents for orbits of noncompact, self adjoint matrix groups." Come for refreshments before the lecture at 2:30 p.m. in 353 Jabara Hall.