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Definition df-uni 4067
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 23312). This is similar to the union of two classes df-un 3310. (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 4066 . 2
3 vx . . . . . 6
4 vy . . . . . 6
53, 4wel 1750 . . . . 5
64cv 1686 . . . . . 6
76, 1wcel 1749 . . . . 5
85, 7wa 362 . . . 4
98, 4wex 1581 . . 3
109, 3cab 2408 . 2
112, 10wceq 1687 1
Colors of variables: wff setvar class
This definition is referenced by:  dfuni2  4068  eluni  4069  unipr  4079  csbuni  4094  csbunigOLD  4095  uniuni  6355  csbunigVD  31212
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