TheoremBase

Well-Orders on a Set

Defines a well-order on a set as a total order on it in which every subset with at least one element has a least element.

Statement

In the setting of Class Theory NBG: the Axioms, Standing Conventions and Basic Notation, let aa be a set.

A well-order on aa is a total order ≤\le on aa such that every subset ss of aa with at least one element has a least element with respect to ≤\le.

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