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| Mirrors > Home > MPE Home > Th. List > Mathboxes > brbigcup | Structured version Visualization version GIF version | ||
| Description: Binary relation over Bigcup . (Contributed by Scott Fenton, 11-Apr-2012.) |
| Ref | Expression |
|---|---|
| brbigcup.1 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| brbigcup | ⊢ (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relbigcup 36111 | . . 3 ⊢ Rel Bigcup | |
| 2 | 1 | brrelex1i 5688 | . 2 ⊢ (𝐴 Bigcup 𝐵 → 𝐴 ∈ V) |
| 3 | brbigcup.1 | . . . 4 ⊢ 𝐵 ∈ V | |
| 4 | eleq1 2825 | . . . 4 ⊢ (∪ 𝐴 = 𝐵 → (∪ 𝐴 ∈ V ↔ 𝐵 ∈ V)) | |
| 5 | 3, 4 | mpbiri 258 | . . 3 ⊢ (∪ 𝐴 = 𝐵 → ∪ 𝐴 ∈ V) |
| 6 | uniexb 7719 | . . 3 ⊢ (𝐴 ∈ V ↔ ∪ 𝐴 ∈ V) | |
| 7 | 5, 6 | sylibr 234 | . 2 ⊢ (∪ 𝐴 = 𝐵 → 𝐴 ∈ V) |
| 8 | breq1 5103 | . . 3 ⊢ (𝑥 = 𝐴 → (𝑥 Bigcup 𝐵 ↔ 𝐴 Bigcup 𝐵)) | |
| 9 | unieq 4876 | . . . 4 ⊢ (𝑥 = 𝐴 → ∪ 𝑥 = ∪ 𝐴) | |
| 10 | 9 | eqeq1d 2739 | . . 3 ⊢ (𝑥 = 𝐴 → (∪ 𝑥 = 𝐵 ↔ ∪ 𝐴 = 𝐵)) |
| 11 | vex 3446 | . . . . 5 ⊢ 𝑥 ∈ V | |
| 12 | df-bigcup 36072 | . . . . 5 ⊢ Bigcup = ((V × V) ∖ ran ((V ⊗ E ) △ (( E ∘ E ) ⊗ V))) | |
| 13 | brxp 5681 | . . . . . 6 ⊢ (𝑥(V × V)𝐵 ↔ (𝑥 ∈ V ∧ 𝐵 ∈ V)) | |
| 14 | 11, 3, 13 | mpbir2an 712 | . . . . 5 ⊢ 𝑥(V × V)𝐵 |
| 15 | epel 5535 | . . . . . . 7 ⊢ (𝑦 E 𝑧 ↔ 𝑦 ∈ 𝑧) | |
| 16 | 15 | rexbii 3085 | . . . . . 6 ⊢ (∃𝑧 ∈ 𝑥 𝑦 E 𝑧 ↔ ∃𝑧 ∈ 𝑥 𝑦 ∈ 𝑧) |
| 17 | vex 3446 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 18 | 17, 11 | coep 35968 | . . . . . 6 ⊢ (𝑦( E ∘ E )𝑥 ↔ ∃𝑧 ∈ 𝑥 𝑦 E 𝑧) |
| 19 | eluni2 4869 | . . . . . 6 ⊢ (𝑦 ∈ ∪ 𝑥 ↔ ∃𝑧 ∈ 𝑥 𝑦 ∈ 𝑧) | |
| 20 | 16, 18, 19 | 3bitr4ri 304 | . . . . 5 ⊢ (𝑦 ∈ ∪ 𝑥 ↔ 𝑦( E ∘ E )𝑥) |
| 21 | 11, 3, 12, 14, 20 | brtxpsd3 36110 | . . . 4 ⊢ (𝑥 Bigcup 𝐵 ↔ 𝐵 = ∪ 𝑥) |
| 22 | eqcom 2744 | . . . 4 ⊢ (𝐵 = ∪ 𝑥 ↔ ∪ 𝑥 = 𝐵) | |
| 23 | 21, 22 | bitri 275 | . . 3 ⊢ (𝑥 Bigcup 𝐵 ↔ ∪ 𝑥 = 𝐵) |
| 24 | 8, 10, 23 | vtoclbg 3516 | . 2 ⊢ (𝐴 ∈ V → (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵)) |
| 25 | 2, 7, 24 | pm5.21nii 378 | 1 ⊢ (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 = wceq 1542 ∈ wcel 2114 ∃wrex 3062 Vcvv 3442 ∪ cuni 4865 class class class wbr 5100 E cep 5531 × cxp 5630 ∘ ccom 5636 Bigcup cbigcup 36048 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-symdif 4207 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-eprel 5532 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-fo 6506 df-fv 6508 df-1st 7943 df-2nd 7944 df-txp 36068 df-bigcup 36072 |
| This theorem is referenced by: dfbigcup2 36113 fvbigcup 36116 ellimits 36124 brapply 36152 dfrdg4 36167 |
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