NFE Home New Foundations Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  NFE Home  >  Th. List  >  csb Unicode version
Syntax Definition csb 3137
Description: Extend class notation to include the proper substitution of a class for a set into another class.
Hypotheses
Ref Expression
vx
cA
cB
Assertion
Ref Expression
csb
See definition df-csb 3138 for more information.
Colors of variables: wff setvar class
  Copyright terms: Public domain W3C validator