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Mirrors > Home > ILE Home > Th. List > prdisj | GIF version |
Description: A Dedekind cut is disjoint. (Contributed by Jim Kingdon, 15-Dec-2019.) |
Ref | Expression |
---|---|
prdisj | ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleq1 2100 | . . . . 5 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ Q ↔ 𝐴 ∈ Q)) | |
2 | 1 | anbi2d 437 | . . . 4 ⊢ (𝑞 = 𝐴 → ((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) ↔ (〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q))) |
3 | eleq1 2100 | . . . . . 6 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ 𝐿 ↔ 𝐴 ∈ 𝐿)) | |
4 | eleq1 2100 | . . . . . 6 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ 𝑈 ↔ 𝐴 ∈ 𝑈)) | |
5 | 3, 4 | anbi12d 442 | . . . . 5 ⊢ (𝑞 = 𝐴 → ((𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈) ↔ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
6 | 5 | notbid 592 | . . . 4 ⊢ (𝑞 = 𝐴 → (¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈) ↔ ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
7 | 2, 6 | imbi12d 223 | . . 3 ⊢ (𝑞 = 𝐴 → (((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) → ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) ↔ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈)))) |
8 | elinp 6572 | . . . . 5 ⊢ (〈𝐿, 𝑈〉 ∈ P ↔ (((𝐿 ⊆ Q ∧ 𝑈 ⊆ Q) ∧ (∃𝑞 ∈ Q 𝑞 ∈ 𝐿 ∧ ∃𝑟 ∈ Q 𝑟 ∈ 𝑈)) ∧ ((∀𝑞 ∈ Q (𝑞 ∈ 𝐿 ↔ ∃𝑟 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑟 ∈ 𝐿)) ∧ ∀𝑟 ∈ Q (𝑟 ∈ 𝑈 ↔ ∃𝑞 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑞 ∈ 𝑈))) ∧ ∀𝑞 ∈ Q ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈) ∧ ∀𝑞 ∈ Q ∀𝑟 ∈ Q (𝑞 <Q 𝑟 → (𝑞 ∈ 𝐿 ∨ 𝑟 ∈ 𝑈))))) | |
9 | simpr2 911 | . . . . 5 ⊢ ((((𝐿 ⊆ Q ∧ 𝑈 ⊆ Q) ∧ (∃𝑞 ∈ Q 𝑞 ∈ 𝐿 ∧ ∃𝑟 ∈ Q 𝑟 ∈ 𝑈)) ∧ ((∀𝑞 ∈ Q (𝑞 ∈ 𝐿 ↔ ∃𝑟 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑟 ∈ 𝐿)) ∧ ∀𝑟 ∈ Q (𝑟 ∈ 𝑈 ↔ ∃𝑞 ∈ Q (𝑞 <Q 𝑟 ∧ 𝑞 ∈ 𝑈))) ∧ ∀𝑞 ∈ Q ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈) ∧ ∀𝑞 ∈ Q ∀𝑟 ∈ Q (𝑞 <Q 𝑟 → (𝑞 ∈ 𝐿 ∨ 𝑟 ∈ 𝑈)))) → ∀𝑞 ∈ Q ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) | |
10 | 8, 9 | sylbi 114 | . . . 4 ⊢ (〈𝐿, 𝑈〉 ∈ P → ∀𝑞 ∈ Q ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) |
11 | 10 | r19.21bi 2407 | . . 3 ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) → ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) |
12 | 7, 11 | vtoclg 2613 | . 2 ⊢ (𝐴 ∈ Q → ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
13 | 12 | anabsi7 515 | 1 ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈)) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 97 ↔ wb 98 ∨ wo 629 ∧ w3a 885 = wceq 1243 ∈ wcel 1393 ∀wral 2306 ∃wrex 2307 ⊆ wss 2917 〈cop 3378 class class class wbr 3764 Qcnq 6378 <Q cltq 6383 Pcnp 6389 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-13 1404 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-coll 3872 ax-sep 3875 ax-pow 3927 ax-pr 3944 ax-un 4170 ax-iinf 4311 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ral 2311 df-rex 2312 df-reu 2313 df-rab 2315 df-v 2559 df-sbc 2765 df-csb 2853 df-dif 2920 df-un 2922 df-in 2924 df-ss 2931 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-int 3616 df-iun 3659 df-br 3765 df-opab 3819 df-mpt 3820 df-id 4030 df-iom 4314 df-xp 4351 df-rel 4352 df-cnv 4353 df-co 4354 df-dm 4355 df-rn 4356 df-res 4357 df-ima 4358 df-iota 4867 df-fun 4904 df-fn 4905 df-f 4906 df-f1 4907 df-fo 4908 df-f1o 4909 df-fv 4910 df-qs 6112 df-ni 6402 df-nqqs 6446 df-inp 6564 |
This theorem is referenced by: ltpopr 6693 addcanprleml 6712 addcanprlemu 6713 |
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