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Syntax Definition w3a 943
Description: Extend wff definition to include 3-way conjunction ('and').
Ref Expression
wph wff 𝜑
wps wff 𝜓
wch wff 𝜒
Ref Expression
w3a wff (𝜑𝜓𝜒)

See definition df-3an 945 for more information.

Colors of variables: wff set class
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