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Mirrors > Home > MPE Home > Th. List > uneq12 | Structured version Visualization version GIF version |
Description: Equality theorem for the union of two classes. (Contributed by NM, 29-Mar-1998.) |
Ref | Expression |
---|---|
uneq12 | ⊢ ((𝐴 = 𝐵 ∧ 𝐶 = 𝐷) → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uneq1 3722 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐶)) | |
2 | uneq2 3723 | . 2 ⊢ (𝐶 = 𝐷 → (𝐵 ∪ 𝐶) = (𝐵 ∪ 𝐷)) | |
3 | 1, 2 | sylan9eq 2664 | 1 ⊢ ((𝐴 = 𝐵 ∧ 𝐶 = 𝐷) → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∪ cun 3538 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-v 3175 df-un 3545 |
This theorem is referenced by: uneq12i 3727 uneq12d 3730 un00 3963 opthprc 5089 dmpropg 5526 unixp 5585 fntpg 5862 fnun 5911 resasplit 5987 fvun 6178 rankprb 8597 pm54.43 8709 xpscg 16041 evlseu 19337 ptuncnv 21420 sshjval 27593 bj-2upleq 32193 poimirlem4 32583 poimirlem9 32588 diophun 36355 pwssplit4 36677 clsk1indlem3 37361 |
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