Alonzo Church

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Church, Alonzo

(1903–  ) mathematician/philosopher; born in Washington, D.C. A professor of philosophy and mathematics at the University of California: Los Angeles (1967), he was author of Introduction of Mathematical Logic. He was editor of the Journal of Symbolic Logic (1936–79) and a member of the National Academy of Sciences.
The Cambridge Dictionary of American Biography, by John S. Bowman. Copyright © Cambridge University Press 1995. Reproduced with permission.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Church, Alonzo

 

Born June 14, 1903, in Washington, D.C. American logician and mathematician.

Church was a professor at Princeton University from 1947 to 1967, when he became a professor of mathematics and philosophy at the University of California at Los Angeles.

Church’s works deal with various branches of logic. He developed the notion of separating the concept of function from that of set. In 1936 he advanced the fundamental hypothesis of the theory of computable functions; now known as Church’s thesis, it states that every effectively computable function is general recursive (seeRECURSIVE FUNCTION). In 1935, Church adduced an example of an undecidable queue problem, and in 1936 he proved that the decision problem for predicate calculus is unsolvable. These results greatly influenced the development of mathematical logic. Church also made an important contribution to the development of combinatory logic and carried out research in logical semantics and modal logic.

WORKS

In Russian translation:
Vvedenie v matematkheskuiu logiku, vol. 1. Moscow, 1960.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

Alonzo Church

(person)
A twentieth century mathematician and logician, and one of the founders of computer science. Church invented the lambda-calculus and posited a version of the Church-Turing thesis.

Alonzo Church

(2)
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