more from George Cantor

### Single Idea 15902

#### [catalogued under 6. Mathematics / A. Nature of Mathematics / 5. The Infinite / a. The Infinite]

Full Idea

From the very nature of an irrational number, it seems necessary to understand the mathematical infinite thoroughly before an adequate theory of irrationals is possible. Infinite classes are obvious in the Dedekind Cut, but have logical difficulties

Gist of Idea

Irrationals and the Dedekind Cut implied infinite classes, but they seemed to have logical difficulties

Source

report of George Cantor (works [1880]) by Shaughan Lavine - Understanding the Infinite II Intro

Book Reference

Lavine,Shaughan: 'Understanding the Infinite' [Harvard 1994], p.11

A Reaction

Almost the whole theory of analysis (calculus) rested on the irrationals, so a theory of the infinite was suddenly (in the 1870s) vital for mathematics. Cantor wasn't just being eccentric or mystical.