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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 9594 for detailed description. In the proof, we invoke the Axiom of Replacement in the form of f1dmex 7937. (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 9592 | . 2 ⊢ ((𝑥 ≠ ∅ ∧ 𝑥 ⊆ ∪ 𝑥) → 𝐹:ω–1-1→𝒫 𝑥) |
| 6 | vpwex 5334 | . 2 ⊢ 𝒫 𝑥 ∈ V | |
| 7 | f1dmex 7937 | . 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 1540 ∈ wcel 2109 ≠ wne 2926 {crab 3408 Vcvv 3450 ∩ cin 3915 ⊆ wss 3916 ∅c0 4298 𝒫 cpw 4565 ∪ cuni 4873 ↦ cmpt 5190 ↾ cres 5642 –1-1→wf1 6510 ωcom 7844 reccrdg 8379 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-rep 5236 ax-sep 5253 ax-nul 5263 ax-pow 5322 ax-pr 5389 ax-un 7713 ax-reg 9551 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3756 df-csb 3865 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-pss 3936 df-nul 4299 df-if 4491 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5110 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-pred 6276 df-ord 6337 df-on 6338 df-lim 6339 df-suc 6340 df-iota 6466 df-fun 6515 df-fn 6516 df-f 6517 df-f1 6518 df-fo 6519 df-f1o 6520 df-fv 6521 df-ov 7392 df-om 7845 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8380 |
| This theorem is referenced by: inf3 9594 infeq5 9596 |
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