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| Mirrors > Home > ILE Home > Th. List > exmidontriimlem2 | GIF version | ||
| Description: Lemma for exmidontriim 7545. (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 488 | . . . . 5 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 ∈ 𝑦) → 𝐵 ∈ On) |
| 3 | simpr 110 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 ∈ 𝑦) → 𝐴 ∈ 𝑦) | |
| 4 | simplr 529 | . . . . . 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 4515 | . . . . 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 2687 | . . 3 ⊢ ((𝜑 ∧ ∃𝑦 ∈ 𝐵 𝐴 ∈ 𝑦) → 𝐴 ∈ 𝐵) |
| 9 | 8 | orcd 741 | . 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 529 | . . . . 5 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 = 𝑦) → 𝑦 ∈ 𝐵) | |
| 12 | 10, 11 | eqeltrd 2311 | . . . 4 ⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝐴 = 𝑦) → 𝐴 ∈ 𝐵) |
| 13 | 12 | r19.29an 2687 | . . 3 ⊢ ((𝜑 ∧ ∃𝑦 ∈ 𝐵 𝐴 = 𝑦) → 𝐴 ∈ 𝐵) |
| 14 | 13 | orcd 741 | . 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 742 | . 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 7541 | . . 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 411 | . 2 ⊢ (𝜑 → (∃𝑦 ∈ 𝐵 𝐴 ∈ 𝑦 ∨ ∃𝑦 ∈ 𝐵 𝐴 = 𝑦 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| 21 | 9, 14, 16, 20 | mpjao3dan 1344 | 1 ⊢ (𝜑 → (𝐴 ∈ 𝐵 ∨ ∀𝑦 ∈ 𝐵 𝑦 ∈ 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∨ wo 716 ∨ w3o 1004 = wceq 1398 ∈ wcel 2205 ∀wral 2522 ∃wrex 2523 EXMIDwem 4312 Oncon0 4489 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-nul 4241 ax-pow 4292 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-rab 2531 df-v 2817 df-dif 3216 df-in 3220 df-ss 3227 df-nul 3513 df-pw 3676 df-sn 3700 df-uni 3920 df-tr 4214 df-exmid 4313 df-iord 4492 df-on 4494 |
| This theorem is referenced by: exmidontriimlem3 7543 |
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