Richard Rochberg, Ph.D. (right), professor of mathematics in Arts & Sciences, speaks with Nets Katz, Ph.D., professor of mathematics at Indiana University, during “Function Spaces and Their Operators: A Conference in Honor of Richard Rochberg on the Occasion of his 65th Birthday,” May 30 in Cupples I. Rochberg, who earned a doctorate in mathematics from Harvard University in 1970, began his WUSTL career that same year as assistant professor. Fourteen invited mathematicians from around the world spoke at the three-day event.