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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 36783 | . . 3 ⊢ Rel Bigcup | |
| 2 | 1 | brrelex1i 5707 | . 2 ⊢ (𝐴 Bigcup 𝐵 → 𝐴 ∈ V) |
| 3 | brbigcup.1 | . . . 4 ⊢ 𝐵 ∈ V | |
| 4 | eleq1 2848 | . . . 4 ⊢ (∪ 𝐴 = 𝐵 → (∪ 𝐴 ∈ V ↔ 𝐵 ∈ V)) | |
| 5 | 3, 4 | mpbiri 261 | . . 3 ⊢ (∪ 𝐴 = 𝐵 → ∪ 𝐴 ∈ V) |
| 6 | uniexb 7782 | . . 3 ⊢ (𝐴 ∈ V ↔ ∪ 𝐴 ∈ V) | |
| 7 | 5, 6 | sylibr 237 | . 2 ⊢ (∪ 𝐴 = 𝐵 → 𝐴 ∈ V) |
| 8 | breq1 5105 | . . 3 ⊢ (𝑥 = 𝐴 → (𝑥 Bigcup 𝐵 ↔ 𝐴 Bigcup 𝐵)) | |
| 9 | unieq 4877 | . . . 4 ⊢ (𝑥 = 𝐴 → ∪ 𝑥 = ∪ 𝐴) | |
| 10 | 9 | eqeq1d 2762 | . . 3 ⊢ (𝑥 = 𝐴 → (∪ 𝑥 = 𝐵 ↔ ∪ 𝐴 = 𝐵)) |
| 11 | vex 3454 | . . . . 5 ⊢ 𝑥 ∈ V | |
| 12 | df-bigcup 36744 | . . . . 5 ⊢ Bigcup = ((V × V) ∖ ran ((V ⊗ E ) △ (( E ∘ E ) ⊗ V))) | |
| 13 | brxp 5700 | . . . . . 6 ⊢ (𝑥(V × V)𝐵 ↔ (𝑥 ∈ V ∧ 𝐵 ∈ V)) | |
| 14 | 11, 3, 13 | mpbir2an 724 | . . . . 5 ⊢ 𝑥(V × V)𝐵 |
| 15 | epel 5554 | . . . . . . 7 ⊢ (𝑦 E 𝑧 ↔ 𝑦 ∈ 𝑧) | |
| 16 | 15 | rexbii 3109 | . . . . . 6 ⊢ (∃𝑧 ∈ 𝑥 𝑦 E 𝑧 ↔ ∃𝑧 ∈ 𝑥 𝑦 ∈ 𝑧) |
| 17 | vex 3454 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 18 | 17, 11 | coep 36641 | . . . . . 6 ⊢ (𝑦( E ∘ E )𝑥 ↔ ∃𝑧 ∈ 𝑥 𝑦 E 𝑧) |
| 19 | eluni2 4870 | . . . . . 6 ⊢ (𝑦 ∈ ∪ 𝑥 ↔ ∃𝑧 ∈ 𝑥 𝑦 ∈ 𝑧) | |
| 20 | 16, 18, 19 | 3bitr4ri 307 | . . . . 5 ⊢ (𝑦 ∈ ∪ 𝑥 ↔ 𝑦( E ∘ E )𝑥) |
| 21 | 11, 3, 12, 14, 20 | brtxpsd3 36782 | . . . 4 ⊢ (𝑥 Bigcup 𝐵 ↔ 𝐵 = ∪ 𝑥) |
| 22 | eqcom 2767 | . . . 4 ⊢ (𝐵 = ∪ 𝑥 ↔ ∪ 𝑥 = 𝐵) | |
| 23 | 21, 22 | bitri 278 | . . 3 ⊢ (𝑥 Bigcup 𝐵 ↔ ∪ 𝑥 = 𝐵) |
| 24 | 8, 10, 23 | vtoclbg 3519 | . 2 ⊢ (𝐴 ∈ V → (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵)) |
| 25 | 2, 7, 24 | pm5.21nii 381 | 1 ⊢ (𝐴 Bigcup 𝐵 ↔ ∪ 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 = wceq 1569 ∈ wcel 2144 ∃wrex 3086 Vcvv 3450 ∪ cuni 4866 class class class wbr 5102 E cep 5550 × cxp 5649 ∘ ccom 5655 Bigcup cbigcup 36720 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-symdif 4197 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5546 df-eprel 5551 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-fo 6549 df-fv 6551 df-1st 8005 df-2nd 8006 df-txp 36740 df-bigcup 36744 |
| This theorem is used by: dfbigcup2 36785 fvbigcup 36788 ellimits 36796 brapply 36824 dfrdg4 36839 |
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