Existential quantification

In predicate logic, an existential quantification is a type of quantifier, a logical constant which is interpreted as "there exists", "there is at least one", or "for some". It is usually denoted by the logical operator symbol ∃, which, when used together with a predicate variable, is called an existential quantifier ("∃x" or "∃(x)" or "(∃x)"). Existential quantification is distinct from universal quantification ("for all"), which asserts that the property or relation holds for all members of the domain. Some sources use the term existentialization to refer to existential quantification.

Existential quantification

Type	Quantifier
Field	Mathematical logic
Statement	${\displaystyle \exists xP(x)}$ is true when ${\displaystyle P(x)}$ is true for at least one value of ${\displaystyle x}$.
Symbolic statement	${\displaystyle \exists xP(x)}$