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| Mirrors > Home > MPE Home > Th. List > ttukeylem4 | Structured version Visualization version GIF version | ||
| Description: Lemma for ttukey 10428. (Contributed by Mario Carneiro, 15-May-2015.) |
| Ref | Expression |
|---|---|
| ttukeylem.1 | ⊢ (𝜑 → 𝐹:(card‘(∪ 𝐴 ∖ 𝐵))–1-1-onto→(∪ 𝐴 ∖ 𝐵)) |
| ttukeylem.2 | ⊢ (𝜑 → 𝐵 ∈ 𝐴) |
| ttukeylem.3 | ⊢ (𝜑 → ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝒫 𝑥 ∩ Fin) ⊆ 𝐴)) |
| ttukeylem.4 | ⊢ 𝐺 = recs((𝑧 ∈ V ↦ if(dom 𝑧 = ∪ dom 𝑧, if(dom 𝑧 = ∅, 𝐵, ∪ ran 𝑧), ((𝑧‘∪ dom 𝑧) ∪ if(((𝑧‘∪ dom 𝑧) ∪ {(𝐹‘∪ dom 𝑧)}) ∈ 𝐴, {(𝐹‘∪ dom 𝑧)}, ∅))))) |
| Ref | Expression |
|---|---|
| ttukeylem4 | ⊢ (𝜑 → (𝐺‘∅) = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0elon 6372 | . . 3 ⊢ ∅ ∈ On | |
| 2 | ttukeylem.1 | . . . 4 ⊢ (𝜑 → 𝐹:(card‘(∪ 𝐴 ∖ 𝐵))–1-1-onto→(∪ 𝐴 ∖ 𝐵)) | |
| 3 | ttukeylem.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝐴) | |
| 4 | ttukeylem.3 | . . . 4 ⊢ (𝜑 → ∀𝑥(𝑥 ∈ 𝐴 ↔ (𝒫 𝑥 ∩ Fin) ⊆ 𝐴)) | |
| 5 | ttukeylem.4 | . . . 4 ⊢ 𝐺 = recs((𝑧 ∈ V ↦ if(dom 𝑧 = ∪ dom 𝑧, if(dom 𝑧 = ∅, 𝐵, ∪ ran 𝑧), ((𝑧‘∪ dom 𝑧) ∪ if(((𝑧‘∪ dom 𝑧) ∪ {(𝐹‘∪ dom 𝑧)}) ∈ 𝐴, {(𝐹‘∪ dom 𝑧)}, ∅))))) | |
| 6 | 2, 3, 4, 5 | ttukeylem3 10421 | . . 3 ⊢ ((𝜑 ∧ ∅ ∈ On) → (𝐺‘∅) = if(∅ = ∪ ∅, if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)), ((𝐺‘∪ ∅) ∪ if(((𝐺‘∪ ∅) ∪ {(𝐹‘∪ ∅)}) ∈ 𝐴, {(𝐹‘∪ ∅)}, ∅)))) |
| 7 | 1, 6 | mpan2 691 | . 2 ⊢ (𝜑 → (𝐺‘∅) = if(∅ = ∪ ∅, if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)), ((𝐺‘∪ ∅) ∪ if(((𝐺‘∪ ∅) ∪ {(𝐹‘∪ ∅)}) ∈ 𝐴, {(𝐹‘∪ ∅)}, ∅)))) |
| 8 | uni0 4891 | . . . . 5 ⊢ ∪ ∅ = ∅ | |
| 9 | 8 | eqcomi 2745 | . . . 4 ⊢ ∅ = ∪ ∅ |
| 10 | 9 | iftruei 4486 | . . 3 ⊢ if(∅ = ∪ ∅, if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)), ((𝐺‘∪ ∅) ∪ if(((𝐺‘∪ ∅) ∪ {(𝐹‘∪ ∅)}) ∈ 𝐴, {(𝐹‘∪ ∅)}, ∅))) = if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)) |
| 11 | eqid 2736 | . . . 4 ⊢ ∅ = ∅ | |
| 12 | 11 | iftruei 4486 | . . 3 ⊢ if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)) = 𝐵 |
| 13 | 10, 12 | eqtri 2759 | . 2 ⊢ if(∅ = ∪ ∅, if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)), ((𝐺‘∪ ∅) ∪ if(((𝐺‘∪ ∅) ∪ {(𝐹‘∪ ∅)}) ∈ 𝐴, {(𝐹‘∪ ∅)}, ∅))) = 𝐵 |
| 14 | 7, 13 | eqtrdi 2787 | 1 ⊢ (𝜑 → (𝐺‘∅) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∀wal 1539 = wceq 1541 ∈ wcel 2113 Vcvv 3440 ∖ cdif 3898 ∪ cun 3899 ∩ cin 3900 ⊆ wss 3901 ∅c0 4285 ifcif 4479 𝒫 cpw 4554 {csn 4580 ∪ cuni 4863 ↦ cmpt 5179 dom cdm 5624 ran crn 5625 “ cima 5627 Oncon0 6317 –1-1-onto→wf1o 6491 ‘cfv 6492 recscrecs 8302 Fincfn 8883 cardccrd 9847 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pr 5377 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7361 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 |
| This theorem is referenced by: ttukeylem7 10425 |
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