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| Mirrors > Home > MPE Home > Th. List > ttukeylem4 | Structured version Visualization version GIF version | ||
| Description: Lemma for ttukey 10440. (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 6378 | . . 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 10433 | . . 3 ⊢ ((𝜑 ∧ ∅ ∈ On) → (𝐺‘∅) = if(∅ = ∪ ∅, if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)), ((𝐺‘∪ ∅) ∪ if(((𝐺‘∪ ∅) ∪ {(𝐹‘∪ ∅)}) ∈ 𝐴, {(𝐹‘∪ ∅)}, ∅)))) |
| 7 | 1, 6 | mpan2 692 | . 2 ⊢ (𝜑 → (𝐺‘∅) = if(∅ = ∪ ∅, if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)), ((𝐺‘∪ ∅) ∪ if(((𝐺‘∪ ∅) ∪ {(𝐹‘∪ ∅)}) ∈ 𝐴, {(𝐹‘∪ ∅)}, ∅)))) |
| 8 | uni0 4878 | . . . . 5 ⊢ ∪ ∅ = ∅ | |
| 9 | 8 | eqcomi 2745 | . . . 4 ⊢ ∅ = ∪ ∅ |
| 10 | 9 | iftruei 4473 | . . 3 ⊢ if(∅ = ∪ ∅, if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)), ((𝐺‘∪ ∅) ∪ if(((𝐺‘∪ ∅) ∪ {(𝐹‘∪ ∅)}) ∈ 𝐴, {(𝐹‘∪ ∅)}, ∅))) = if(∅ = ∅, 𝐵, ∪ (𝐺 “ ∅)) |
| 11 | eqid 2736 | . . . 4 ⊢ ∅ = ∅ | |
| 12 | 11 | iftruei 4473 | . . 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 1540 = wceq 1542 ∈ wcel 2114 Vcvv 3429 ∖ cdif 3886 ∪ cun 3887 ∩ cin 3888 ⊆ wss 3889 ∅c0 4273 ifcif 4466 𝒫 cpw 4541 {csn 4567 ∪ cuni 4850 ↦ cmpt 5166 dom cdm 5631 ran crn 5632 “ cima 5634 Oncon0 6323 –1-1-onto→wf1o 6497 ‘cfv 6498 recscrecs 8310 Fincfn 8893 cardccrd 9859 |
| 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 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pr 5375 ax-un 7689 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 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 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 |
| This theorem is referenced by: ttukeylem7 10437 |
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