Gary Chartrand

He earned his B. S. from Michigan State University, where he majored in mathematics and minored in physical sciences and foreign languages.

Michigan State University also awarded him a Master of Science and a PhD for his work in graph theory in 1964.

Chartrand worked with Frank Harary at the University of Michigan, where he spent a year as a Research Associate, and the two have published numerous papers together (along with other authors).

The topic of highly irregular graphs was introduced by Chartrand, Paul Erdős and Ortrud Oellermann.

During his career at Western Michigan University, he advised 22 doctoral students in their research on aspects of graph theory.