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Theorem bj-uniex 9348
 Description: uniex 4140 from bounded separation. (Contributed by BJ, 13-Nov-2019.) (Proof modification is discouraged.)
Hypothesis
Ref Expression
bj-uniex.1 A V
Assertion
Ref Expression
bj-uniex A V

Proof of Theorem bj-uniex
Dummy variables x y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 bj-uniex.1 . 2 A V
2 unieq 3580 . . 3 (x = A x = A)
32eleq1d 2103 . 2 (x = A → ( x V ↔ A V))
4 bj-uniex2 9347 . . 3 y y = x
54issetri 2558 . 2 x V
61, 3, 5vtocl 2602 1 A V
 Colors of variables: wff set class Syntax hints:   = wceq 1242   ∈ wcel 1390  Vcvv 2551  ∪ cuni 3571 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 629  ax-5 1333  ax-7 1334  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-8 1392  ax-10 1393  ax-11 1394  ax-i12 1395  ax-bnd 1396  ax-4 1397  ax-13 1401  ax-14 1402  ax-17 1416  ax-i9 1420  ax-ial 1424  ax-i5r 1425  ax-ext 2019  ax-un 4136  ax-bd0 9248  ax-bdex 9254  ax-bdel 9256  ax-bdsb 9257  ax-bdsep 9319 This theorem depends on definitions:  df-bi 110  df-tru 1245  df-nf 1347  df-sb 1643  df-clab 2024  df-cleq 2030  df-clel 2033  df-nfc 2164  df-rex 2306  df-v 2553  df-uni 3572  df-bdc 9276 This theorem is referenced by:  bj-uniexg  9349  bj-unex  9350
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