Theorem bj-unex 15719

Description: unex 4486 from bounded separation. (Contributed by BJ, 13-Nov-2019.) (Proof modification is discouraged.)

Hypotheses

Ref	Expression
bj-unex.1	⊢ 𝐴 ∈ V
bj-unex.2	⊢ 𝐵 ∈ V

Assertion

Ref	Expression
bj-unex	⊢ (𝐴 ∪ 𝐵) ∈ V

Proof of Theorem bj-unex

Step	Hyp	Ref	Expression
1		bj-unex.1	. . 3 ⊢ 𝐴 ∈ V
2		bj-unex.2	. . 3 ⊢ 𝐵 ∈ V
3	1, 2	unipr 3863	. 2 ⊢ ∪ {𝐴, 𝐵} = (𝐴 ∪ 𝐵)
4		bj-prexg 15711	. . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → {𝐴, 𝐵} ∈ V)
5	1, 2, 4	mp2an 426	. . 3 ⊢ {𝐴, 𝐵} ∈ V
6	5	bj-uniex 15717	. 2 ⊢ ∪ {𝐴, 𝐵} ∈ V
7	3, 6	eqeltrri 2278	1 ⊢ (𝐴 ∪ 𝐵) ∈ V

Syntax hints:   ∈ wcel 2175  Vcvv 2771   ∪ cun 3163  {cpr 3633  ∪ cuni 3849

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1469  ax-7 1470  ax-gen 1471  ax-ie1 1515  ax-ie2 1516  ax-8 1526  ax-10 1527  ax-11 1528  ax-i12 1529  ax-bndl 1531  ax-4 1532  ax-17 1548  ax-i9 1552  ax-ial 1556  ax-i5r 1557  ax-13 2177  ax-14 2178  ax-ext 2186  ax-pr 4252  ax-un 4478  ax-bd0 15613  ax-bdor 15616  ax-bdex 15619  ax-bdeq 15620  ax-bdel 15621  ax-bdsb 15622  ax-bdsep 15684

This theorem depends on definitions:  df-bi 117  df-tru 1375  df-nf 1483  df-sb 1785  df-clab 2191  df-cleq 2197  df-clel 2200  df-nfc 2336  df-rex 2489  df-v 2773  df-un 3169  df-sn 3638  df-pr 3639  df-uni 3850  df-bdc 15641

This theorem is referenced by:  bdunexb  15720  bj-unexg  15721