He taught at the University of Rochester for 25 years , and also worked at Purdue University and Rutgers University for ten years , each .
Johannes Henricus Bernardus Kemperman ( July 16 , 1924 -- June 13 , 2011 ) was a Dutch mathematician .
Johannes Henricus Bernardus Kemperman taught at the University of Rochester for 25 years , and also worked at Purdue University and Rutgers University for ten years , each .
Johannes Henricus Bernardus Kemperman ( July 16 , 1924 -- June 13 , 2011 ) was a Dutch mathematician .