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Mirrors > Home > ILE Home > Th. List > wsbc | GIF version |
Description: Extend wff notation to include the proper substitution of a class for a set. Read this notation as "the proper substitution of class 𝐴 for setvar variable 𝑥 in wff 𝜑." |
Ref | Expression |
---|---|
wph | wff 𝜑 |
vx | setvar 𝑥 |
cA | class 𝐴 |
Ref | Expression |
---|---|
wsbc | wff [𝐴 / 𝑥]𝜑 |
Colors of variables: wff set class |
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