NFE Home New Foundations Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  NFE Home  >  Th. List  >  csb GIF version

Syntax Definition csb 3136
Description: Extend class notation to include the proper substitution of a class for a set into another class.
Ref Expression
vx setvar x
cA class A
cB class B
Ref Expression
csb class [A / x]B

See definition df-csb 3137 for more information.

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