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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 2202 | . . . . 5 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ Q ↔ 𝐴 ∈ Q)) | |
2 | 1 | anbi2d 459 | . . . 4 ⊢ (𝑞 = 𝐴 → ((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) ↔ (〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q))) |
3 | eleq1 2202 | . . . . . 6 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ 𝐿 ↔ 𝐴 ∈ 𝐿)) | |
4 | eleq1 2202 | . . . . . 6 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ 𝑈 ↔ 𝐴 ∈ 𝑈)) | |
5 | 3, 4 | anbi12d 464 | . . . . 5 ⊢ (𝑞 = 𝐴 → ((𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈) ↔ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
6 | 5 | notbid 656 | . . . 4 ⊢ (𝑞 = 𝐴 → (¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈) ↔ ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
7 | 2, 6 | imbi12d 233 | . . 3 ⊢ (𝑞 = 𝐴 → (((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) → ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) ↔ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈)))) |
8 | elinp 7282 | . . . . 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 988 | . . . . 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 120 | . . . 4 ⊢ (〈𝐿, 𝑈〉 ∈ P → ∀𝑞 ∈ Q ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) |
11 | 10 | r19.21bi 2520 | . . 3 ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) → ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) |
12 | 7, 11 | vtoclg 2746 | . 2 ⊢ (𝐴 ∈ Q → ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
13 | 12 | anabsi7 570 | 1 ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈)) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ↔ wb 104 ∨ wo 697 ∧ w3a 962 = wceq 1331 ∈ wcel 1480 ∀wral 2416 ∃wrex 2417 ⊆ wss 3071 〈cop 3530 class class class wbr 3929 Qcnq 7088 <Q cltq 7093 Pcnp 7099 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-coll 4043 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-iinf 4502 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-reu 2423 df-rab 2425 df-v 2688 df-sbc 2910 df-csb 3004 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-iun 3815 df-br 3930 df-opab 3990 df-mpt 3991 df-id 4215 df-iom 4505 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-rn 4550 df-res 4551 df-ima 4552 df-iota 5088 df-fun 5125 df-fn 5126 df-f 5127 df-f1 5128 df-fo 5129 df-f1o 5130 df-fv 5131 df-qs 6435 df-ni 7112 df-nqqs 7156 df-inp 7274 |
This theorem is referenced by: ltpopr 7403 addcanprleml 7422 addcanprlemu 7423 suplocexprlemdisj 7528 suplocexprlemub 7531 |
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