MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  wsbc Structured version   Visualization version   GIF version

Syntax Definition wsbc 3306
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."
Hypotheses
Ref Expression
wph wff 𝜑
vx setvar 𝑥
cA class 𝐴
Assertion
Ref Expression
wsbc wff [𝐴 / 𝑥]𝜑

See definition df-sbc 3307 for more information.

Colors of variables: wff setvar class
  Copyright terms: Public domain W3C validator