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Definition df-v 2803
Description: Define the universal class. Definition 5.20 of [TakeutiZaring] p. 21. Also Definition 2.9 of [Quine] p. 19. (Contributed by NM, 5-Aug-1993.)
Assertion
Ref Expression
df-v  |-  _V  =  { x  |  x  =  x }

Detailed syntax breakdown of Definition df-v
StepHypRef Expression
1 cvv 2801 . 2  class  _V
2 vx . . . 4  set  x
32, 2weq 1633 . . 3  wff  x  =  x
43, 2cab 2282 . 2  class  { x  |  x  =  x }
51, 4wceq 1632 1  wff  _V  =  { x  |  x  =  x }
Colors of variables: wff set class
This definition is referenced by:  vex  2804  int0  3892  ruv  7330  foo3  23039  domep  24220  elnev  27741
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