more from Henri Poincaré

Single Idea 18203

[catalogued under 6. Mathematics / C. Sources of Mathematics / 10. Constructivism / d. Predicativism]

Full Idea

Never consider any objects but those capable of being defined in a finite number of word ...Avoid non-predicative classifications and definitions.

Gist of Idea

Avoid non-predicative classifications and definitions


Henri Poincaré (The Logic of Infinity [1909], p.63), quoted by Penelope Maddy - Naturalism in Mathematics II.4

Book Reference

Maddy,Penelope: 'Naturalism in Mathematics' [OUP 2000], p.126