Robert Aubrey Hearn

Robert Aubrey Hearn, known as Bob Hearn, is an American ultramarathon runner, computer scientist and recreational mathematician from Oklahoma who graduated from Rice University in 1987. He was one of the two original developers of ClarisWorks and a founder of Gobe Software in 1997, and his 2006 dissertation at the Massachusetts Institute of Technology invented nondeterministic constraint logic, which became the 2009 book Games, Puzzles, and Computation with Erik Demaine. He began competing in ultra-marathons at 42 and has set many US age-class records; he won the 2021 Last Annual Vol State Road Race, a 500 km race, and in 2023 USA Track and Field named him its male masters ultrarunner of the year.