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| Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-unex | GIF version | ||
| Description: unex 4477 from bounded separation. (Contributed by BJ, 13-Nov-2019.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| bj-unex.1 | ⊢ 𝐴 ∈ V |
| bj-unex.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| bj-unex | ⊢ (𝐴 ∪ 𝐵) ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bj-unex.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 2 | bj-unex.2 | . . 3 ⊢ 𝐵 ∈ V | |
| 3 | 1, 2 | unipr 3854 | . 2 ⊢ ∪ {𝐴, 𝐵} = (𝐴 ∪ 𝐵) |
| 4 | bj-prexg 15641 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → {𝐴, 𝐵} ∈ V) | |
| 5 | 1, 2, 4 | mp2an 426 | . . 3 ⊢ {𝐴, 𝐵} ∈ V |
| 6 | 5 | bj-uniex 15647 | . 2 ⊢ ∪ {𝐴, 𝐵} ∈ V |
| 7 | 3, 6 | eqeltrri 2270 | 1 ⊢ (𝐴 ∪ 𝐵) ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2167 Vcvv 2763 ∪ cun 3155 {cpr 3624 ∪ cuni 3840 |
| 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 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-pr 4243 ax-un 4469 ax-bd0 15543 ax-bdor 15546 ax-bdex 15549 ax-bdeq 15550 ax-bdel 15551 ax-bdsb 15552 ax-bdsep 15614 |
| This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-rex 2481 df-v 2765 df-un 3161 df-sn 3629 df-pr 3630 df-uni 3841 df-bdc 15571 |
| This theorem is referenced by: bdunexb 15650 bj-unexg 15651 |
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