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Mirrors > Home > MPE Home > Th. List > domtriord | Structured version Visualization version GIF version |
Description: Dominance is trichotomous in the restricted case of ordinal numbers. (Contributed by Jeff Hankins, 24-Oct-2009.) |
Ref | Expression |
---|---|
domtriord | ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ≼ 𝐵 ↔ ¬ 𝐵 ≺ 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sbth 8744 | . . . . 5 ⊢ ((𝐵 ≼ 𝐴 ∧ 𝐴 ≼ 𝐵) → 𝐵 ≈ 𝐴) | |
2 | 1 | expcom 417 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → (𝐵 ≼ 𝐴 → 𝐵 ≈ 𝐴)) |
3 | 2 | a1i 11 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ≼ 𝐵 → (𝐵 ≼ 𝐴 → 𝐵 ≈ 𝐴))) |
4 | iman 405 | . . . 4 ⊢ ((𝐵 ≼ 𝐴 → 𝐵 ≈ 𝐴) ↔ ¬ (𝐵 ≼ 𝐴 ∧ ¬ 𝐵 ≈ 𝐴)) | |
5 | brsdom 8629 | . . . 4 ⊢ (𝐵 ≺ 𝐴 ↔ (𝐵 ≼ 𝐴 ∧ ¬ 𝐵 ≈ 𝐴)) | |
6 | 4, 5 | xchbinxr 338 | . . 3 ⊢ ((𝐵 ≼ 𝐴 → 𝐵 ≈ 𝐴) ↔ ¬ 𝐵 ≺ 𝐴) |
7 | 3, 6 | syl6ib 254 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ≼ 𝐵 → ¬ 𝐵 ≺ 𝐴)) |
8 | onelss 6233 | . . . . . . . . . 10 ⊢ (𝐵 ∈ On → (𝐴 ∈ 𝐵 → 𝐴 ⊆ 𝐵)) | |
9 | ssdomg 8652 | . . . . . . . . . 10 ⊢ (𝐵 ∈ On → (𝐴 ⊆ 𝐵 → 𝐴 ≼ 𝐵)) | |
10 | 8, 9 | syld 47 | . . . . . . . . 9 ⊢ (𝐵 ∈ On → (𝐴 ∈ 𝐵 → 𝐴 ≼ 𝐵)) |
11 | 10 | adantl 485 | . . . . . . . 8 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ∈ 𝐵 → 𝐴 ≼ 𝐵)) |
12 | 11 | con3d 155 | . . . . . . 7 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐴 ≼ 𝐵 → ¬ 𝐴 ∈ 𝐵)) |
13 | ontri1 6225 | . . . . . . . 8 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) | |
14 | 13 | ancoms 462 | . . . . . . 7 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) |
15 | 12, 14 | sylibrd 262 | . . . . . 6 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐴 ≼ 𝐵 → 𝐵 ⊆ 𝐴)) |
16 | ssdomg 8652 | . . . . . . 7 ⊢ (𝐴 ∈ On → (𝐵 ⊆ 𝐴 → 𝐵 ≼ 𝐴)) | |
17 | 16 | adantr 484 | . . . . . 6 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ⊆ 𝐴 → 𝐵 ≼ 𝐴)) |
18 | 15, 17 | syld 47 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐴 ≼ 𝐵 → 𝐵 ≼ 𝐴)) |
19 | ensym 8655 | . . . . . . 7 ⊢ (𝐵 ≈ 𝐴 → 𝐴 ≈ 𝐵) | |
20 | endom 8633 | . . . . . . 7 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ≼ 𝐵) | |
21 | 19, 20 | syl 17 | . . . . . 6 ⊢ (𝐵 ≈ 𝐴 → 𝐴 ≼ 𝐵) |
22 | 21 | con3i 157 | . . . . 5 ⊢ (¬ 𝐴 ≼ 𝐵 → ¬ 𝐵 ≈ 𝐴) |
23 | 18, 22 | jca2 517 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐴 ≼ 𝐵 → (𝐵 ≼ 𝐴 ∧ ¬ 𝐵 ≈ 𝐴))) |
24 | 23, 5 | syl6ibr 255 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐴 ≼ 𝐵 → 𝐵 ≺ 𝐴)) |
25 | 24 | con1d 147 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐵 ≺ 𝐴 → 𝐴 ≼ 𝐵)) |
26 | 7, 25 | impbid 215 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ≼ 𝐵 ↔ ¬ 𝐵 ≺ 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 399 ∈ wcel 2112 ⊆ wss 3853 class class class wbr 5039 Oncon0 6191 ≈ cen 8601 ≼ cdom 8602 ≺ csdm 8603 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-op 4534 df-uni 4806 df-br 5040 df-opab 5102 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-ord 6194 df-on 6195 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-er 8369 df-en 8605 df-dom 8606 df-sdom 8607 |
This theorem is referenced by: sdomel 8771 cardsdomel 9555 alephord 9654 alephsucdom 9658 alephdom2 9666 |
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