The existential quantification of P(x) is the statement: “There exists an element x in the domain such that P(x)” denoted ∃xP(x). ∃xP(x) is true when P(x) is true for one or more x in the domain. An element for which P(x) is true is called a witness of ∃xP(x).
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The existential quantification of P(x) is the statement: “There exists an element x in the domain such that P(x)” denoted ∃xP(x). ∃xP(x) is true when P(x) is true for one or more x in the domain. An element for which P(x) is true is called a witness of ∃xP(x).