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Syntax Definition w3a 1084
Description: Extend wff definition to include three-way conjunction ('and').
Ref Expression
wph wff 𝜑
wps wff 𝜓
wch wff 𝜒
Ref Expression
w3a wff (𝜑𝜓𝜒)

See definition df-3an 1086 for more information.

Colors of variables: wff setvar class
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