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Ideas for 'A Résumé of Metaphysics', 'A Tour through Mathematical Logic' and 'Writings from Late Notebooks'

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6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / e. Ordinal numbers

13530

An ordinal is an equivalence class of well-orderings, or a transitive set whose members are transitive [Wolf,RS]

6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / a. Units

7207	Counting needs unities, but that doesn't mean they exist; we borrowed it from the concept of 'I' [Nietzsche]