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Definition df-uni 4118
Description: Define the union of a class i.e. the collection of all members of the members of the class. Definition 5.5 of [TakeutiZaring] p. 16. For example, (ex-uni 22755). This is similar to the union of two classes df-un 3370. (Contributed by NM, 23-Aug-1993.)
Assertion
Ref Expression
df-uni
Distinct variable group:   , ,

Detailed syntax breakdown of Definition df-uni
StepHypRef Expression
1 cA . . 3
21cuni 4117 . 2
3 vx . . . . . 6
4 vy . . . . . 6
53, 4wel 1733 . . . . 5
64cv 1669 . . . . . 6
76, 1wcel 1732 . . . . 5
85, 7wa 360 . . . 4
98, 4wex 1565 . . 3
109, 3cab 2475 . 2
112, 10wceq 1670 1
Colors of variables: wff set class
This definition is referenced by:  dfuni2  4119  eluni  4120  unipr  4130  csbuni  4145  csbunigOLD  4146  uniuni  6395  csbunigVD  30480
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