Efim Isaakovich Zelmanov (Russian: Ефи́м Исаа́кович Зе́льманов; born 7 September 1955) is a Russian-American[1] mathematician, known for his work on combinatorial problems in nonassociative algebra and group theory, including his solution of the restricted Burnside problem.

He had a position in Novosibirsk until 1987, when he left the Soviet Union.In 1990, he moved to the United States, becoming a professor at the University of Wisconsin–Madison.

[5][6] He served as a chair professor and the scientific director of the SUSTech International Center for Mathematics.

[11] Zelmanov gave invited talks at the International Congress of Mathematicians in Warsaw (1983), Kyoto (1990) and Zurich (1994).

He then showed that the Engel identity for Lie algebras implies nilpotence, in the case of infinite dimensions.