
The axiom of canonicity was introduced by the famous Polish logician Roman Suszko in 1951 as an explication of Skolem's Paradox (without reference to the L\"{o}wenheim-Skolem theorem) and a precise representation of the axiom of restriction in set theory proposed much earlier by Abraham Fraenkel. We discuss the main features of Suszko's contribution and hint at its possible further applications.
History of mathematics in the 20th century, axiom of restriction, countability, Axiomatics of classical set theory and its fragments, History of mathematical logic and foundations, extremal axiom, uncountability, constructible set, model of set theory, Skolem's paradox
History of mathematics in the 20th century, axiom of restriction, countability, Axiomatics of classical set theory and its fragments, History of mathematical logic and foundations, extremal axiom, uncountability, constructible set, model of set theory, Skolem's paradox
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