John Erik Fornæss

John Erik Fornæss (born 14 October 1946, Hamar, Norway) is a Norwegian-American mathematician.

Fornæss received his master's degree in 1970 from the University of Oslo with thesis Uniform approximation on manifolds and his PhD in 1974 from the University of Washington under Edgar Lee Stout with thesis Embedding Strictly Pseudoconvex Domains in Convex Domains.

He does research on the theory of functions of several complex variables with emphasis on their geometry and dynamics.

With Nessim Sibony he constructed a Fatou-Julia theory in two complex variables.

[2][3] Fornæss is a fellow of the Norwegian Academy of Science and Letters.