wmo - Metamath Proof Explorer

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Syntax Definition wmo 2459

Description: Extend wff definition to include uniqueness ("there exists at most one 𝑥 such that 𝜑").

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

**Assertion**
Ref	Expression
wmo	wff ∃*𝑥𝜑

See definition df-mo 2463 for more information.

Colors of variables: wff setvar class