∀
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See also: Appendix:Variations of "a"
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Translingual
Description
An upside-down capital letter A.
Etymology
Introduced by Gerhard Gentzen who based it on the Latin letter A, by analogy with ∃.
Symbol
∀
- (mathematics, logic) The symbol used in predicate calculus, etc, to represent the universal quantifier, meaning “for all”.
- Synonym: ⋀