Leo Anthony Harrington (born May 17, 1946) is a professor of mathematics at the University of California, Berkeley who works in
recursion theory, model theory, and set theory.
Having retired from being a Mathematician, Professor Leo Harrington is now a Philosopher.[citation needed]
His notable results include proving the Paris–Harrington theorem along with Jeff Paris,[1]
showing that if the axiom of determinacy holds for all analytic sets then x# exists for all reals x,[2]
and proving with Saharon Shelah that the first-order theory of the partially ordered set of recursively enumerable Turing degrees is undecidable.[3]
^Paris, J.; Harrington, L. (1977), "A Mathematical Incompleteness in Peano Arithmetic", in Barwise, J. (ed.), Handbook of Mathematical Logic, North-Holland, pp. 1133–1142
^Harrington, L. (1978), "Analytic Determinacy and 0#", Journal of Symbolic Logic, 43 (4): 685–693, doi:10.2307/2273508, JSTOR 2273508, S2CID 46061318
^Harrington, L.; Shelah, S. (1982), "The undecidability of the recursively enumerable degrees", Bull. Amer. Math. Soc. (N.S.), 6 (1): 79–80, doi:10.1090/S0273-0979-1982-14970-9
Leo Anthony Harrington (born May 17, 1946) is a professor of mathematics at the University of California, Berkeley who works in recursion theory, model...
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in the television series The Cisco Kid (1950–1956) and in several films. Leo Carrillo was a member of the Carrillo family of California, a prominent Californio...
Daniel Gorenstein Phillip A. Griffiths M. L. Gromov Wolfgang Haken LeoHarrington Allen Edward Hatcher Michael Robert Herman Melvin Hochster Ju. S. Ilyashenko...
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an external member of the Hungarian Academy of Sciences (1995). With LeoHarrington and Saharon Shelah he proved the Vaught conjecture for ω-stable theories...
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