NFE Home New Foundations Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  NFE Home  >  Th. List  >  c0 Structured version   Unicode version

Syntax Definition c0 3550
Description: Extend class notation to include the empty set.
Assertion
Ref Expression
c0

See definition df-nul 3551 for more information.

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