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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ordtypeon | Structured version Visualization version GIF version | ||
| Description: A proper class with a set-like well-ordering is isomorphic to the proper class of all ordinal numbers. (Contributed by BTernaryTau, 9-Jun-2026.) |
| Ref | Expression |
|---|---|
| ordtypeon.1 | ⊢ 𝐹 = OrdIso(𝑅, 𝐴) |
| Ref | Expression |
|---|---|
| ordtypeon | ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → 𝐹 Isom E , 𝑅 (On, 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ordtypeon.1 | . . . 4 ⊢ 𝐹 = OrdIso(𝑅, 𝐴) | |
| 2 | 1 | ordtype 9504 | . . 3 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) → 𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴)) |
| 3 | 2 | 3adant3 1150 | . 2 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → 𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴)) |
| 4 | 1 | oicl 9501 | . . . 4 ⊢ Ord dom 𝐹 |
| 5 | isof1o 7332 | . . . . . . 7 ⊢ (𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴) → 𝐹:dom 𝐹–1-1-onto→𝐴) | |
| 6 | f1ovv 7964 | . . . . . . 7 ⊢ (𝐹:dom 𝐹–1-1-onto→𝐴 → (dom 𝐹 ∈ V ↔ 𝐴 ∈ V)) | |
| 7 | 2, 5, 6 | 3syl 19 | . . . . . 6 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) → (dom 𝐹 ∈ V ↔ 𝐴 ∈ V)) |
| 8 | 7 | notbid 321 | . . . . 5 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) → (¬ dom 𝐹 ∈ V ↔ ¬ 𝐴 ∈ V)) |
| 9 | 8 | biimp3ar 1499 | . . . 4 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → ¬ dom 𝐹 ∈ V) |
| 10 | ordprcon 35503 | . . . 4 ⊢ ((Ord dom 𝐹 ∧ ¬ dom 𝐹 ∈ V) → dom 𝐹 = On) | |
| 11 | 4, 9, 10 | sylancr 599 | . . 3 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → dom 𝐹 = On) |
| 12 | isoeq4 7329 | . . 3 ⊢ (dom 𝐹 = On → (𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴) ↔ 𝐹 Isom E , 𝑅 (On, 𝐴))) | |
| 13 | 11, 12 | syl 18 | . 2 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → (𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴) ↔ 𝐹 Isom E , 𝑅 (On, 𝐴))) |
| 14 | 3, 13 | mpbid 235 | 1 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → 𝐹 Isom E , 𝑅 (On, 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2146 Vcvv 3458 E cep 5565 Se wse 5617 We wwe 5618 dom cdm 5666 Ord word 6366 Oncon0 6367 –1-1-onto→wf1o 6542 Isom wiso 6544 OrdIsocoi 9481 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pr 5409 ax-un 7745 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-se 5620 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7380 df-ov 7426 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-oi 9482 |
| This theorem is used by: wevonprcf1o 35621 |
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