François Jaeger, a French mathematician (notably a graph theorist)

David Sumner (a graph theorist at the University of South Carolina) conjectured in 1971 that tournaments are universal graphs for polytrees.

To a true graph theorist, a tree is a connected graph with no cycles.

William Kocay, Canadian professor and graph theorist.

Kenneth Brooks Reid, Jr. is a graph theorist and the founder faculty (Head 1989) professor at California State University, San Marcos.

Among graph theorists, cycle, polygon, or n-gon are also often used.

William Lawrence Kocay is a Canadian professor at the department of computer science at St. Paul's College of the University of Manitoba and a graph theorist.

A graph theorist who has also worked on puzzles.

His son Dénes Kőnig was a graph theorist.

One of those defeated graph theorists was Václav Chvátal, who had the previous year invented graph toughness in an attempt to solve the problem.