Combining Texts

Ideas for 'The Social Contract (tr Cress)', 'Proof that every set can be well-ordered' and 'Principia Mathematica'

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2 ideas

6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / i. Reals from cuts

18248

A real number is the class of rationals less than the number [Russell/Whitehead, by Shapiro]

6. Mathematics / A. Nature of Mathematics / 5. The Infinite / e. Countable infinity

15897

Zermelo realised that Choice would facilitate the sort of 'counting' Cantor needed [Zermelo, by Lavine]