wex - New Foundations Explorer

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Syntax Definition wex 1541

Description: Extend wff definition to include the existential quantifier ("there exists").

**Hypotheses**
Ref	Expression
wph	wff φ
vx	setvar x

**Assertion**
Ref	Expression
wex	wff ∃xφ

See definition df-ex 1542 for more information.

Colors of variables: wff setvar class