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| Mirrors > Home > ILE Home > Th. List > exmidontriimlem2 | GIF version | ||
| Description: Lemma for exmidontriim 7571. (Contributed by Jim Kingdon, 12-Aug-2024.) |
| Ref | Expression |
|---|---|
| exmidontriimlem2.b | ⊢ (𝜑 → 𝐵 ∈ On) |
| exmidontriimlem2.em | ⊢ (𝜑 → EXMID) |
| exmidontriimlem2.hb | ⊢ (𝜑 → ∀𝑦 ∈ 𝐵 (𝐴 ∈ 𝑦 ∨ 𝐴 = 𝑦 ∨ 𝑦 ∈ 𝐴)) |
| Ref | Expression |
|---|---|
| exmidontriimlem2 | ⊢ (𝜑 → (𝐴 ∈ 𝐵 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | exmidontriimlem2.b | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ On) | |
| 2 | 1 | ad2antrr 492 | . . . . 5 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 ∈ 𝑦) → 𝐵 ∈ On) |
| 3 | simpr 110 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 ∈ 𝑦) → 𝐴 ∈ 𝑦) | |
| 4 | simplr 533 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 ∈ 𝑦) → 𝑦 ∈ 𝐵) | |
| 5 | 3, 4 | jca 306 | . . . . 5 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 ∈ 𝑦) → (𝐴 ∈ 𝑦 ∧ 𝑦 ∈ 𝐵)) |
| 6 | ontr1 4529 | . . . . 5 ⊢ (𝐵 ∈ On → ((𝐴 ∈ 𝑦 ∧ 𝑦 ∈ 𝐵) → 𝐴 ∈ 𝐵)) | |
| 7 | 2, 5, 6 | sylc 62 | . . . 4 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 ∈ 𝑦) → 𝐴 ∈ 𝐵) |
| 8 | 7 | r19.29an 2693 | . . 3 ⊢ ((𝜑 ∧ ∃𝑦 ∈ 𝐵 𝐴 ∈ 𝑦) → 𝐴 ∈ 𝐵) |
| 9 | 8 | orcd 745 | . 2 ⊢ ((𝜑 ∧ ∃𝑦 ∈ 𝐵 𝐴 ∈ 𝑦) → (𝐴 ∈ 𝐵 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| 10 | simpr 110 | . . . . 5 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 = 𝑦) → 𝐴 = 𝑦) | |
| 11 | simplr 533 | . . . . 5 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 = 𝑦) → 𝑦 ∈ 𝐵) | |
| 12 | 10, 11 | eqeltrd 2315 | . . . 4 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 = 𝑦) → 𝐴 ∈ 𝐵) |
| 13 | 12 | r19.29an 2693 | . . 3 ⊢ ((𝜑 ∧ ∃𝑦 ∈ 𝐵 𝐴 = 𝑦) → 𝐴 ∈ 𝐵) |
| 14 | 13 | orcd 745 | . 2 ⊢ ((𝜑 ∧ ∃𝑦 ∈ 𝐵 𝐴 = 𝑦) → (𝐴 ∈ 𝐵 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| 15 | simpr 110 | . . 3 ⊢ ((𝜑 ∧ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴) → ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴) | |
| 16 | 15 | olcd 746 | . 2 ⊢ ((𝜑 ∧ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴) → (𝐴 ∈ 𝐵 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| 17 | exmidontriimlem2.hb | . . 3 ⊢ (𝜑 → ∀𝑦 ∈ 𝐵 (𝐴 ∈ 𝑦 ∨ 𝐴 = 𝑦 ∨ 𝑦 ∈ 𝐴)) | |
| 18 | exmidontriimlem2.em | . . 3 ⊢ (𝜑 → EXMID) | |
| 19 | exmidontriimlem1 7567 | . . 3 ⊢ ((∀𝑦 ∈ 𝐵 (𝐴 ∈ 𝑦 ∨ 𝐴 = 𝑦 ∨ 𝑦 ∈ 𝐴) ∧ EXMID) → (∃𝑦 ∈ 𝐵 𝐴 ∈ 𝑦 ∨ ∃𝑦 ∈ 𝐵 𝐴 = 𝑦 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) | |
| 20 | 17, 18, 19 | syl2anc 415 | . 2 ⊢ (𝜑 → (∃𝑦 ∈ 𝐵 𝐴 ∈ 𝑦 ∨ ∃𝑦 ∈ 𝐵 𝐴 = 𝑦 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| 21 | 9, 14, 16, 20 | mpjao3dan 1348 | 1 ⊢ (𝜑 → (𝐴 ∈ 𝐵 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∨ wo 720 ∨ w3o 1008 = wceq 1402 ∈ wcel 2209 ∀wral 2528 ∃wrex 2529 EXMIDwem 4326 Oncon0 4503 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-nul 4254 ax-pow 4306 |
| This theorem depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3687 df-sn 3711 df-uni 3931 df-tr 4225 df-exmid 4327 df-iord 4506 df-on 4508 |
| This theorem is referenced by: exmidontriimlem3 7569 |
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