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| Mirrors > Home > MPE Home > Th. List > inf3lem7 | Structured version Visualization version GIF version | ||
| Description: Lemma for our Axiom of Infinity => standard Axiom of Infinity. See inf3 9544 for detailed description. In the proof, we invoke the Axiom of Replacement in the form of f1dmex 7901. (Contributed by NM, 29-Oct-1996.) (Proof shortened by Mario Carneiro, 19-Jan-2013.) |
| Ref | Expression |
|---|---|
| inf3lem.1 | ⊢ 𝐺 = (𝑦 ∈ V ↦ {𝑤 ∈ 𝑥 ∣ (𝑤 ∩ 𝑥) ⊆ 𝑦}) |
| inf3lem.2 | ⊢ 𝐹 = (rec(𝐺, ∅) ↾ ω) |
| inf3lem.3 | ⊢ 𝐴 ∈ V |
| inf3lem.4 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| inf3lem7 | ⊢ ((𝑥 ≠ ∅ ∧ 𝑥 ⊆ ∪ 𝑥) → ω ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inf3lem.1 | . . 3 ⊢ 𝐺 = (𝑦 ∈ V ↦ {𝑤 ∈ 𝑥 ∣ (𝑤 ∩ 𝑥) ⊆ 𝑦}) | |
| 2 | inf3lem.2 | . . 3 ⊢ 𝐹 = (rec(𝐺, ∅) ↾ ω) | |
| 3 | inf3lem.3 | . . 3 ⊢ 𝐴 ∈ V | |
| 4 | inf3lem.4 | . . 3 ⊢ 𝐵 ∈ V | |
| 5 | 1, 2, 3, 4 | inf3lem6 9542 | . 2 ⊢ ((𝑥 ≠ ∅ ∧ 𝑥 ⊆ ∪ 𝑥) → 𝐹:ω–1-1→𝒫 𝑥) |
| 6 | vpwex 5322 | . 2 ⊢ 𝒫 𝑥 ∈ V | |
| 7 | f1dmex 7901 | . 2 ⊢ ((𝐹:ω–1-1→𝒫 𝑥 ∧ 𝒫 𝑥 ∈ V) → ω ∈ V) | |
| 8 | 5, 6, 7 | sylancl 586 | 1 ⊢ ((𝑥 ≠ ∅ ∧ 𝑥 ⊆ ∪ 𝑥) → ω ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ≠ wne 2932 {crab 3399 Vcvv 3440 ∩ cin 3900 ⊆ wss 3901 ∅c0 4285 𝒫 cpw 4554 ∪ cuni 4863 ↦ cmpt 5179 ↾ cres 5626 –1-1→wf1 6489 ωcom 7808 reccrdg 8340 |
| 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-pow 5310 ax-pr 5377 ax-un 7680 ax-reg 9497 |
| 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-lim 6322 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-om 7809 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 |
| This theorem is referenced by: inf3 9544 infeq5 9546 |
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