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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 9495 | . . 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 9492 | . . . 4 ⊢ Ord dom 𝐹 |
| 5 | isof1o 7323 | . . . . . . 7 ⊢ (𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴) → 𝐹:dom 𝐹–1-1-onto→𝐴) | |
| 6 | f1ovv 7956 | . . . . . . 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 35456 | . . . 4 ⊢ ((Ord dom 𝐹 ∧ ¬ dom 𝐹 ∈ V) → dom 𝐹 = On) | |
| 11 | 4, 9, 10 | sylancr 598 | . . 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 |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 ∧ w3a 1103 = wceq 1570 ∈ wcel 2143 Vcvv 3455 E cep 5562 Se wse 5614 We wwe 5615 dom cdm 5663 Ord word 6361 Oncon0 6362 –1-1-onto→wf1o 6537 Isom wiso 6539 OrdIsocoi 9472 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-isom 6547 df-riota 7369 df-ov 7415 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-oi 9473 |
| This theorem is referenced by: wevonprcf1o 35575 |
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