S.M. Shah Retirement Conference, May 1976.

Frank Keogh Retirement Conference, May 1983

Bieberbach Conference in Complex Analysis

Purdue University, March 1985

Gregynog Conference in Partial Differential Equations, August 1989

Al Baernstein, 65 th Birthday Celebration, May 2005

Ted Suffridge 75 th Birthday Celebration, May 2008

Conference celebrating the work of David Drasin and Linda Sons, May 2010