👤 PersonErnst Zermelo1871–1953 · GermanyWikipediaWikipedia (es)Wikidata🌍 View on the globeInventions and discoveries · 21901Russell paradox and Principia MathematicaDiscovery · discoverer1904-1908Axiom of choice and Zermelo-Fraenkel set theoryTheorem, law or theory · discoverer