1. For the provenance of these stories, see Alberto A. Martínez, The Cult of Pythagoras—Man and Myth (University of Pittsburgh Press, Pittsburgh, Pa., 2012)。
2. Aristotle, Metaphysics, Book I, Chapter 5, 985b 23–26 (Oxford trans.)。
3. Ibid., 986a 2 (Oxford trans.)。
4. Aristotle, Prior Analytics, Book I, Chapter 23, 41a 23–30.
5. Plato, Theaetetus, 147 D–E (Oxford trans.)。
6. Aristotle, Physics, 215p 1–5 (Oxford trans.)。
7. Plato, The Republic, 529E, trans. Robin Wakefield (Oxford University Press, Oxford, 1993), p. 261.
8. E. P. Wigner, “The Unreasonable Effectiveness of Mathematics,” communications in Pure and Applied Mathematics 13 (1960): 1–14.