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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 9071 | . 2 ⊢ (𝐴 ≼ 𝐵 → ¬ 𝐵 ≺ 𝐴) | |
| 2 | sdomdom 8957 | . . . . . . 7 ⊢ (𝐴 ≺ 𝐵 → 𝐴 ≼ 𝐵) | |
| 3 | 2 | con3i 154 | . . . . . 6 ⊢ (¬ 𝐴 ≼ 𝐵 → ¬ 𝐴 ≺ 𝐵) |
| 4 | fidomtri 9948 | . . . . . . 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 | imbitrrid 248 | . . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐴 ≼ 𝐵 → 𝐵 ≼ 𝐴)) |
| 7 | ensym 8980 | . . . . . . 7 ⊢ (𝐵 ≈ 𝐴 → 𝐴 ≈ 𝐵) | |
| 8 | endom 8956 | . . . . . . 7 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ≼ 𝐵) | |
| 9 | 7, 8 | syl 17 | . . . . . 6 ⊢ (𝐵 ≈ 𝐴 → 𝐴 ≼ 𝐵) |
| 10 | 9 | con3i 154 | . . . . 5 ⊢ (¬ 𝐴 ≼ 𝐵 → ¬ 𝐵 ≈ 𝐴) |
| 11 | 6, 10 | jca2 521 | . . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐴 ≼ 𝐵 → (𝐵 ≼ 𝐴 ∧ ¬ 𝐵 ≈ 𝐴))) |
| 12 | brsdom 8951 | . . . 4 ⊢ (𝐵 ≺ 𝐴 ↔ (𝐵 ≼ 𝐴 ∧ ¬ 𝐵 ≈ 𝐴)) | |
| 13 | 11, 12 | imbitrrdi 254 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐴 ≼ 𝐵 → 𝐵 ≺ 𝐴)) |
| 14 | 13 | con1d 145 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (¬ 𝐵 ≺ 𝐴 → 𝐴 ≼ 𝐵)) |
| 15 | 1, 14 | impbid2 228 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ Fin) → (𝐴 ≼ 𝐵 ↔ ¬ 𝐵 ≺ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 399 ∈ wcel 2141 class class class wbr 5099 ≈ cen 8920 ≼ cdom 8921 ≺ csdm 8922 Fincfn 8923 |
| 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-sep 5245 ax-nul 5255 ax-pow 5321 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-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-int 4905 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-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-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-om 7843 df-1o 8432 df-er 8673 df-en 8924 df-dom 8925 df-sdom 8926 df-fin 8927 df-card 9894 |
| This theorem is referenced by: gchdomtri 10584 gchdju1 10611 frgpcyg 21605 |
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