wa - Metamath Proof Explorer

Metamath Proof Explorer

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Syntax Definition wa 223

Description: Extend wff definition to include conjunction ('and').

**Hypotheses**
Ref	Expression
wph	wff φ
wps	wff ψ

**Assertion**
Ref	Expression
wa	wff (φ ⋀ ψ)

See definition df-an 225 for more information.

Colors of variables: wff set class