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Mirrors > Home > MPE Home > Th. List > fidomtri2 | Structured version Visualization version GIF version |
Description: Trichotomy of dominance without AC when one set is finite. (Contributed by Stefan O'Rear, 30-Oct-2014.) (Revised by Mario Carneiro, 7-May-2015.) |
Ref | Expression |
---|---|
fidomtri2 | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (𝐴 ≼ 𝐵 ↔ ¬ 𝐵 ≺ 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | domnsym 8772 | . 2 ⊢ (𝐴 ≼ 𝐵 → ¬ 𝐵 ≺ 𝐴) | |
2 | sdomdom 8656 | . . . . . . 7 ⊢ (𝐴 ≺ 𝐵 → 𝐴 ≼ 𝐵) | |
3 | 2 | con3i 157 | . . . . . 6 ⊢ (¬ 𝐴 ≼ 𝐵 → ¬ 𝐴 ≺ 𝐵) |
4 | fidomtri 9609 | . . . . . . 7 ⊢ ((𝐵 ∈ Fin ∧ 𝐴 ∈ 𝑉) → (𝐵 ≼ 𝐴 ↔ ¬ 𝐴 ≺ 𝐵)) | |
5 | 4 | ancoms 462 | . . . . . 6 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (𝐵 ≼ 𝐴 ↔ ¬ 𝐴 ≺ 𝐵)) |
6 | 3, 5 | syl5ibr 249 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐴 ≼ 𝐵 → 𝐵 ≼ 𝐴)) |
7 | ensym 8677 | . . . . . . 7 ⊢ (𝐵 ≈ 𝐴 → 𝐴 ≈ 𝐵) | |
8 | endom 8655 | . . . . . . 7 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ≼ 𝐵) | |
9 | 7, 8 | syl 17 | . . . . . 6 ⊢ (𝐵 ≈ 𝐴 → 𝐴 ≼ 𝐵) |
10 | 9 | con3i 157 | . . . . 5 ⊢ (¬ 𝐴 ≼ 𝐵 → ¬ 𝐵 ≈ 𝐴) |
11 | 6, 10 | jca2 517 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐴 ≼ 𝐵 → (𝐵 ≼ 𝐴 ∧ ¬ 𝐵 ≈ 𝐴))) |
12 | brsdom 8651 | . . . 4 ⊢ (𝐵 ≺ 𝐴 ↔ (𝐵 ≼ 𝐴 ∧ ¬ 𝐵 ≈ 𝐴)) | |
13 | 11, 12 | syl6ibr 255 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐴 ≼ 𝐵 → 𝐵 ≺ 𝐴)) |
14 | 13 | con1d 147 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐵 ≺ 𝐴 → 𝐴 ≼ 𝐵)) |
15 | 1, 14 | impbid2 229 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (𝐴 ≼ 𝐵 ↔ ¬ 𝐵 ≺ 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 399 ∈ wcel 2110 class class class wbr 5053 ≈ cen 8623 ≼ cdom 8624 ≺ csdm 8625 Fincfn 8626 |
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 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 |
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 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-ral 3066 df-rex 3067 df-rab 3070 df-v 3410 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-om 7645 df-er 8391 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-card 9555 |
This theorem is referenced by: gchdomtri 10243 gchdju1 10270 frgpcyg 20538 |
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