A program for the full axiom of choice

06/09/2020
by   Jean-Louis Krivine, et al.
0

The theory of classical realizability is a framework for the Curry-Howard correspondence which enables to associate a program with each proof in Zermelo-Fraenkel set theory. But, almost all the applications of mathematics in physics, probability, statistics, etc. use Analysis i.e. the axiom of dependent choice (DC) or even the (full) axiom of choice (AC). It is therefore important to find explicit programs for these axioms. Various solutions are already known for DC, for instance the lambda-term known as "bar recursion". We present here the first one, as far as we know, for AC.

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