🔬 Discovery

Russell paradox and Principia Mathematica

Paradoja de Russell y Principia Mathematica

Date
1901 · confidence high
Place
Cambridge, England
Credited to
Bertrand Russell; Principia Mathematica with Alfred North Whitehead (1910-1913)
People
👤 Alfred North Whitehead1861–1947👤 Bertrand Russell1872–1970👤 Ernst Zermelo1871–1953
Field
Knowledge & symbols

What was discovered

The set of all sets that do not contain themselves leads to contradiction, which ruined naive set theory and Frege's system. The type theory of the Principia attempted to rebuild mathematics from logic.

Zermelo independently discovered the paradox around 1900 without publishing it.

What it led to

  • Zermelo-Fraenkel axiomatics
  • type theory and typed programming languages
  • Gödel's theorems (which refute full logicism)
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Built on

  • Cantor's set theory
  • Frege's Begriffsschrift
  • Burali-Forti paradox

Made possible

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