Richard F. Johnsonbaugh (born 1941)[1] is an American mathematician and computer scientist. His interests include discrete mathematics and the history of mathematics. He is the author of several textbooks.
Johnsonbaugh earned a bachelor's degree in mathematics from Yale University, and then moved to the University of Oregon for graduate study.[2] He completed his Ph.D. at Oregon in 1969. His dissertation, I. Classical Fundamental Groups and Covering Space Theory in the Setting of Cartan and Chevalley; II. Spaces and Algebras of Vector-Valued Differentiable Functions, was supervised by Bertram Yood.[3] He also has a second master's degree in computer science from the University of Illinois at Chicago.[2]
He is currently professor emeritus at De Paul University.[2]