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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 2233 | . . . . 5 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ Q ↔ 𝐴 ∈ Q)) | |
2 | 1 | anbi2d 461 | . . . 4 ⊢ (𝑞 = 𝐴 → ((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) ↔ (〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q))) |
3 | eleq1 2233 | . . . . . 6 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ 𝐿 ↔ 𝐴 ∈ 𝐿)) | |
4 | eleq1 2233 | . . . . . 6 ⊢ (𝑞 = 𝐴 → (𝑞 ∈ 𝑈 ↔ 𝐴 ∈ 𝑈)) | |
5 | 3, 4 | anbi12d 470 | . . . . 5 ⊢ (𝑞 = 𝐴 → ((𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈) ↔ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
6 | 5 | notbid 662 | . . . 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 7436 | . . . . 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 999 | . . . . 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 2558 | . . 3 ⊢ ((〈𝐿, 𝑈〉 ∈ P ∧ 𝑞 ∈ Q) → ¬ (𝑞 ∈ 𝐿 ∧ 𝑞 ∈ 𝑈)) |
12 | 7, 11 | vtoclg 2790 | . 2 ⊢ (𝐴 ∈ Q → ((〈𝐿, 𝑈〉 ∈ P ∧ 𝐴 ∈ Q) → ¬ (𝐴 ∈ 𝐿 ∧ 𝐴 ∈ 𝑈))) |
13 | 12 | anabsi7 576 | 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 703 ∧ w3a 973 = wceq 1348 ∈ wcel 2141 ∀wral 2448 ∃wrex 2449 ⊆ wss 3121 〈cop 3586 class class class wbr 3989 Qcnq 7242 <Q cltq 7247 Pcnp 7253 |
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 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4104 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-iinf 4572 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-int 3832 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-id 4278 df-iom 4575 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 df-fv 5206 df-qs 6519 df-ni 7266 df-nqqs 7310 df-inp 7428 |
This theorem is referenced by: ltpopr 7557 addcanprleml 7576 addcanprlemu 7577 suplocexprlemdisj 7682 suplocexprlemub 7685 |
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