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Geilziege_Randkriecher @Geilziege_Randkriecher

2 years ago

Anarchy ForAll

Criado 2 years ago · 0 comentário· 0 curtida

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#mathematics #anarchy

In predicate logic the upsidedown "A" symbol ∀ denotes "for all" (universal quatification). Before its introduction by Gerhard Gentzen, "Untersuchungen ueber das logische Schliessen," Math. Z., 39, (1935), p, 178. mathematicians used the "not" symbol ¬ and the existential quantifier ∃ (there exists) from Peano's notation.