Yiannis N. Moschovakis

Yiannis Nicholas Moschovakis (; born January 18, 1938) is a set theorist, descriptive set theorist, and recursion (computability) theorist, at UCLA.

His book ''Descriptive Set Theory'' (North-Holland) is the primary reference for the subject. He is especially associated with the development of the effective, or lightface, version of descriptive set theory, and he is known for the Moschovakis coding lemma that is named after him. Provided by Wikipedia