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A total order \(β€\) on a set \(X\) is a well ordering if every nonempty subset of \(X\) has a minimum.
In particular \(X\) has a minimum that we will indicate with \(0_ X\).
A total order \(β€\) on a set \(X\) is a well ordering if every nonempty subset of \(X\) has a minimum.
In particular \(X\) has a minimum that we will indicate with \(0_ X\).