See also
Gödel Number, Kleene's s-m-n Theorem, Recursive Function
This entry contributed by Alex Sakharov (author's link)
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References
Davis, M. Computability and Unsolvability. New York: Dover, 1982.Kleene, S. C. Introduction to Metamathematics. Princeton, NJ: Van Nostrand, 1964.Rogers, H. Theory of Recursive Functions and Effective Computability. Cambridge, MA: MIT Press, 1987.
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Cite this as:
Sakharov, Alex. "Kleene's Recursion Theorem." From MathWorld--A Wolfram Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/KleenesRecursionTheorem.html