Professor Floyd L. Williams obtained his Ph.D. Mathematics in 1972. He held the positions of Associate Instructor at the University of California/Irvine (1970-72) and Instructor Massachusetts Institute of Technology (1972-75). At the University of Massachusetts-Amherst, the author has been Assistant Professor (1975-1978), Associate Professor (1978-84), and Professor (1984-). 1. The author has published over 100 papers and several books. 2. In 2013 he was inducted as a Fellow into the American Mathematical Society.