Topological dynamics and applications : a volume in honor of Robert Ellis : proceedings of a conference in honor of the retirement of Robert Ellis, April 5-6, 1995, University of Minnesota - Ellis, Robert, 1926-; Nerurkar, M. G. (Mahesh G.), 1952-; Dokken, D. (Douglas), 1950-; Ellis, D. (David), 1958- (Contemporary mathematics (American Mathematical Society), 1998)