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Definition df-int 3607
Description: Define the intersection of a class. Definition 7.35 of [TakeutiZaring] p. 44. For example,  |^| { { 1 , 3 } , { 1 , 8 } } = { 1 } . Compare this with the intersection of two classes, df-in 2918. (Contributed by NM, 18-Aug-1993.)
Assertion
Ref Expression
df-int  |^|  {  |  }
Distinct variable group:   ,,

Detailed syntax breakdown of Definition df-int
StepHypRef Expression
1 cA . . 3
21cint 3606 . 2  |^|
3 vy . . . . . . 7  setvar
43cv 1241 . . . . . 6
54, 1wcel 1390 . . . . 5
6 vx . . . . . 6  setvar
76, 3wel 1391 . . . . 5
85, 7wi 4 . . . 4
98, 3wal 1240 . . 3
109, 6cab 2023 . 2  {  |  }
112, 10wceq 1242 1  |^|  {  |  }
Colors of variables: wff set class
This definition is referenced by:  dfint2  3608  elint  3612  int0  3620  dfiin2g  3681  bdcint  9266  bdcriota  9272
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