Title: Twentieth Annual Southern California Probability Symposium Date: Sunday, December 3, 1989 Host: UCI Organizer: Program: 9:00-10:00 AM Coffee 10:00-10:40 AM Glen Swindle (UCLA) Convergence results for the exclusion process 10:50-11:30 AM Steven Kalikow (USC) Explicit isomorphism of infinite entropy transformations 11:40-12:20 AM Neil Falkner (UCSD) Non-randomized Skorokhod stopping for right processes 12:30-2:30 PM Lunch 2:30-3:10 PM Massimo Campanino (UCI) $d+1$ dimensional percolation with $d$ dimensional disorder and related models 3:20-4:00 PM Steven Evans (UCB) Self-avoiding walk on a hierarchical lattice in 4 dimensions