1. W. Burnside,Proceedings of the London Mathematical Society (2), 7 (1980), 4.

2. Mr. Davies, Historical notices respecting an ancient problem,The Mathematician 3 (1849), 225.

3. T. Dreyfus and T. Eisenberg, On the aesthetics of mathematical thought,For the Learning of Mathematics 6 (1986). See also the letter in the next issue and the author’s reply.

4. Freeman J. Dyson, Unfashionable pursuits,The Mathematical Intelligencer 5, no. 3 (1983), 47.

5. P. R. Halmos, Why is a congress?The Mathematical Intelligencer 9, no. 2 (1987), 20.

6. David Hume, On simplicity and refinement in writing,Selected English Essays, W. Peacock, (ed.) Oxford: Oxford University Press (1911), 152.

7. F. Le Lionnais, Beauty in mathematics,Great Currents of Mathematical Thought, (F. Le Lionnais, ed.), Pinter and Kline, trans. New York: Dover, n.d. 128.

8. J. E. Littlewood,A Mathematician’s Miscellany, New York: Methuen (1963), 85.

9. Saunders Mac Lane, The health of mathematics,The Mathematical Intelligencer 5, no. 4 (1983), 53.

10. Roger Penrose, The role of aesthetics in pure and applied athematical research,Bulletin of the Institute of Mathematics and its Applications 10 (1974), 268.

11. Ibid., 267.

12. David Wells, Beauty, mathematics, and Philip Kitcher,Studies of Meaning, Language and Change 21 (1988).