MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  csb Unicode version

Syntax Definition csb 3434
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 3435 for more information.

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