De Witt Lee Sumners is an American mathematician, having been the Robert O. Lawton Distinguished Professor at Florida State University.
[1][2] He is known for his research in knot theory, topological fluid dynamics, and their application to DNA.
[3] Sumners earned his Ph.D. in 1967 from the University of Cambridge under the supervision of John F. P.
[4] He retired in 2007, and became a professor emeritus.
In 2012, he was named as one of the inaugural Fellows of the American Mathematical Society.