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| Mirrors > Home > MPE Home > Th. List > entri2 | Structured version Visualization version GIF version | ||
| Description: Trichotomy of dominance and strict dominance. (Contributed by NM, 4-Jan-2004.) |
| Ref | Expression |
|---|---|
| entri2 | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≼ 𝐵 ∨ 𝐵 ≺ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | entric 10612 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵 ∨ 𝐵 ≺ 𝐴)) | |
| 2 | brdom2 8987 | . . . 4 ⊢ (𝐴 ≼ 𝐵 ↔ (𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵)) | |
| 3 | 2 | orbi1i 927 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∨ 𝐵 ≺ 𝐴) ↔ ((𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵) ∨ 𝐵 ≺ 𝐴)) |
| 4 | df-3or 1104 | . . 3 ⊢ ((𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵 ∨ 𝐵 ≺ 𝐴) ↔ ((𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵) ∨ 𝐵 ≺ 𝐴)) | |
| 5 | 3, 4 | bitr4i 281 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∨ 𝐵 ≺ 𝐴) ↔ (𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵 ∨ 𝐵 ≺ 𝐴)) |
| 6 | 1, 5 | sylibr 237 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≼ 𝐵 ∨ 𝐵 ≺ 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∨ wo 861 ∨ w3o 1102 ∈ wcel 2145 class class class wbr 5102 ≈ cen 8948 ≼ cdom 8949 ≺ csdm 8950 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-ac2 10512 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-se 5601 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6293 df-ord 6354 df-on 6355 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-isom 6536 df-riota 7365 df-ov 7411 df-2nd 7985 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-er 8695 df-en 8952 df-dom 8953 df-sdom 8954 df-card 9991 df-ac 10166 |
| This theorem is used by: entri3 10614 |
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