• Jan 5, 1909
    (b.) -
    Jan 25, 1994


One of many distinguished students of Alonzo Church, Kleene, along with Alan Turing, Emil Post, and others, is best known as a founder of the branch of mathematical logic known as recursion theory. Kleene's work grounds the study of which functions are computable. A number of mathematical concepts are named after him: Kleene hierarchy, Kleene algebra, the Kleene star (Kleene closure), Kleene's recursion theorem and the Kleene fixpoint theorem. He also invented regular expressions, and was a leading American advocate of mathematical intuitionism.
  • Date of Birth:

    Jan 5, 1909
  • Date of Death:

    Jan 25, 1994
  • Gender:

  • Noted For:

    American mathematician who helped lay the foundations for theoretical computer science
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