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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 9477 | . . 3 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) → 𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴)) |
| 3 | 2 | 3adant3 1144 | . 2 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → 𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴)) |
| 4 | 1 | oicl 9474 | . . . 4 ⊢ Ord dom 𝐹 |
| 5 | isof1o 7303 | . . . . . . 7 ⊢ (𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴) → 𝐹:dom 𝐹–1-1-onto→𝐴) | |
| 6 | f1ovv 7935 | . . . . . . 7 ⊢ (𝐹:dom 𝐹–1-1-onto→𝐴 → (dom 𝐹 ∈ V ↔ 𝐴 ∈ V)) | |
| 7 | 2, 5, 6 | 3syl 18 | . . . . . 6 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) → (dom 𝐹 ∈ V ↔ 𝐴 ∈ V)) |
| 8 | 7 | notbid 320 | . . . . 5 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) → (¬ dom 𝐹 ∈ V ↔ ¬ 𝐴 ∈ V)) |
| 9 | 8 | biimp3ar 1490 | . . . 4 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → ¬ dom 𝐹 ∈ V) |
| 10 | ordprcon 35347 | . . . 4 ⊢ ((Ord dom 𝐹 ∧ ¬ dom 𝐹 ∈ V) → dom 𝐹 = On) | |
| 11 | 4, 9, 10 | sylancr 596 | . . 3 ⊢ ((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴 ∧ ¬ 𝐴 ∈ V) → dom 𝐹 = On) |
| 12 | isoeq4 7300 | . . 3 ⊢ (dom 𝐹 = On → (𝐹 Isom E , 𝑅 (dom 𝐹, 𝐴) ↔ 𝐹 Isom E , 𝑅 (On, 𝐴))) | |
| 13 | 11, 12 | syl 17 | . 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 234 | 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 208 ∧ wa 399 ∧ w3a 1097 = wceq 1559 ∈ wcel 2141 Vcvv 3453 E cep 5544 Se wse 5596 We wwe 5597 dom cdm 5645 Ord word 6341 Oncon0 6342 –1-1-onto→wf1o 6516 Isom wiso 6518 OrdIsocoi 9454 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pr 5389 ax-un 7714 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-se 5599 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6284 df-ord 6345 df-on 6346 df-lim 6347 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-isom 6526 df-riota 7349 df-ov 7395 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-oi 9455 |
| This theorem is referenced by: wevonprcf1o 35420 |
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