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

Syntax Definition wss 3257
Description: Extend wff notation to include the subclass relation. This is read " is a subclass of " or " includes ." When exists as a set, it is also read " is a subset of ."
Hypotheses
Ref Expression
cA
cB
Assertion
Ref Expression
wss

See definition df-ss 3259 for more information.

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