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| Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-unex | GIF version | ||
| Description: unex 4506 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 3878 | . 2 ⊢ ∪ {𝐴, 𝐵} = (𝐴 ∪ 𝐵) |
| 4 | bj-prexg 16046 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → {𝐴, 𝐵} ∈ V) | |
| 5 | 1, 2, 4 | mp2an 426 | . . 3 ⊢ {𝐴, 𝐵} ∈ V |
| 6 | 5 | bj-uniex 16052 | . 2 ⊢ ∪ {𝐴, 𝐵} ∈ V |
| 7 | 3, 6 | eqeltrri 2281 | 1 ⊢ (𝐴 ∪ 𝐵) ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2178 Vcvv 2776 ∪ cun 3172 {cpr 3644 ∪ cuni 3864 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-pr 4269 ax-un 4498 ax-bd0 15948 ax-bdor 15951 ax-bdex 15954 ax-bdeq 15955 ax-bdel 15956 ax-bdsb 15957 ax-bdsep 16019 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-rex 2492 df-v 2778 df-un 3178 df-sn 3649 df-pr 3650 df-uni 3865 df-bdc 15976 |
| This theorem is referenced by: bdunexb 16055 bj-unexg 16056 |
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