Quantifier

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A quantifier is a logical operator which bounds a variable. Every quantifier must apply to some variable. Some examples of quantifiers include \forall, \exists, \exists^\infty, \exists !, \exists^{=n}, Q, \star, \Box, \Diamond, and \Delta^\sharp. These roughly correspond to natural language quantifiers such as "all", "some", "exists finitely many", "probably exists".

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