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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 9510 | . . 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 9507 | . . . 4 ⊢ Ord dom 𝐹 |
| 5 | isof1o 7323 | . . . . . . 7 ⊢ (𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴) → 𝐹:dom 𝐹–1-1-onto→𝐴) | |
| 6 | f1ovv 7959 | . . . . . . 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 35696 | . . . 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 7320 | . . 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 2145 Vcvv 3451 E cep 5550 Se wse 5602 We wwe 5603 dom cdm 5651 Ord word 6354 Oncon0 6355 –1-1-onto→wf1o 6530 Isom wiso 6532 OrdIsocoi 9487 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pr 5391 ax-un 7740 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-isom 6540 df-riota 7369 df-ov 7415 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-oi 9488 |
| This theorem is used by: wevonprcf1o 35865 |
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