Jeffry Ned Kahn is a professor of mathematics at Rutgers University

Rutgers University

Rutgers, The State University of New Jersey , is the largest institution for higher education in New Jersey, United States. It was originally chartered as Queen's College in 1766. It is the eighth-oldest college in the United States and one of the nine Colonial colleges founded before the American...

 notable for his work in combinatorics

Combinatorics

Combinatorics is a branch of mathematics concerning the study of finite or countable discrete structures. Aspects of combinatorics include counting the structures of a given kind and size , deciding when certain criteria can be met, and constructing and analyzing objects meeting the criteria ,...

. Kahn received his Ph.D from the Ohio State University

Ohio State University

The Ohio State University, commonly referred to as Ohio State, is a public research university located in Columbus, Ohio. It was originally founded in 1870 as a land-grant university and is currently the third largest university campus in the United States...

 in 1979 after completing his dissertation under his advisor Dwijendra Kumar Ray-Chaudhuri.

In 1993, together with Gil Kalai

Gil Kalai

Gil Kalai is the Henry and Manya Noskwith Professor of Mathematics at the Hebrew University of Jerusalem, and adjunct professor of mathematics and of computer science at Yale University, and the editor of the Israel Journal of Mathematics.-Biography:...

, he disproved Borsuk's conjecture

Borsuk's conjecture

The Borsuk problem in geometry, for historical reasons incorrectly called a Borsuk conjecture, is a question in discrete geometry.-Problem:...

. In 1996 he was awarded the Pólya Prize (SIAM)

Pólya Prize (SIAM)

The Pólya Prize is a prize in mathematics, awarded by the Society for Industrial and Applied Mathematics. First given in 1969, the prize is named after Hungarian mathematician George Pólya...

.
In 2004, with David Galvin
he has made seminal contributions to the combinatorial theory of phase transitions.