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Definition df-in 2918
Description: Define the intersection of two classes. Definition 5.6 of [TakeutiZaring] p. 16. Contrast this operation with union  u. (df-un 2916) and difference  \ (df-dif 2914). (Contributed by NM, 29-Apr-1994.)
Assertion
Ref Expression
df-in  i^i  {  |  }
Distinct variable groups:   ,   ,

Detailed syntax breakdown of Definition df-in
StepHypRef Expression
1 cA . . 3
2 cB . . 3
31, 2cin 2910 . 2  i^i
4 vx . . . . . 6  setvar
54cv 1241 . . . . 5
65, 1wcel 1390 . . . 4
75, 2wcel 1390 . . . 4
86, 7wa 97 . . 3
98, 4cab 2023 . 2  {  |  }
103, 9wceq 1242 1  i^i  {  |  }
Colors of variables: wff set class
This definition is referenced by:  dfin5  2919  dfss2  2928  elin  3120  disj  3262  iinxprg  3722  bdcin  9318
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