Discussion. Object/Subjective. Noon-1 p.m., Smart Museum of Art, cafe, 5550 S. Greenwood Ave., 773-702-0200, free. Sara Mendelsohn, executive assistant for program support at the Smart Museum, and Faye R. Gleisser, a Ph.D. candidate at Northwestern University, discuss the work of Bruce Nauman.Lunch is provided. Space is limited. Register at smartmuseum.uchicago.edu /calendar/register.