Donald George Stewart, 85, passed away November 29, 2018. He served in the U.S. Air Force from 1951 to 1955. Don graduated from the University of Utah and then attended the University of Tennessee where he received his Doctor of Philosophy. Don was a professor at ASU for many years. He co-wrote books on mathematics with his good friend and colleague Matt Hassett. He retired professor emeritus. Don is survived by a brother and many nieces and nephews as well as grand nieces and nephews. He was preceded in death by two sisters. A celebration of Don's life will be held at Skirm Auditorium at Friendship Village, 2645 E Southern Avenue in Tempe on December 17, 2018 at 10:30 a.m. (Source: Arizona Republic)