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Mirrors > Home > ILE Home > Th. List > ivthinclemdisj | GIF version |
Description: Lemma for ivthinc 13032. The lower and upper cuts are disjoint. (Contributed by Jim Kingdon, 18-Feb-2024.) |
Ref | Expression |
---|---|
ivth.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ) |
ivth.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
ivth.3 | ⊢ (𝜑 → 𝑈 ∈ ℝ) |
ivth.4 | ⊢ (𝜑 → 𝐴 < 𝐵) |
ivth.5 | ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ 𝐷) |
ivth.7 | ⊢ (𝜑 → 𝐹 ∈ (𝐷–cn→ℂ)) |
ivth.8 | ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ) |
ivth.9 | ⊢ (𝜑 → ((𝐹‘𝐴) < 𝑈 ∧ 𝑈 < (𝐹‘𝐵))) |
ivthinc.i | ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑥 < 𝑦)) → (𝐹‘𝑥) < (𝐹‘𝑦)) |
ivthinclem.l | ⊢ 𝐿 = {𝑤 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑤) < 𝑈} |
ivthinclem.r | ⊢ 𝑅 = {𝑤 ∈ (𝐴[,]𝐵) ∣ 𝑈 < (𝐹‘𝑤)} |
Ref | Expression |
---|---|
ivthinclemdisj | ⊢ (𝜑 → (𝐿 ∩ 𝑅) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 5468 | . . . . . . . 8 ⊢ (𝑥 = 𝑧 → (𝐹‘𝑥) = (𝐹‘𝑧)) | |
2 | 1 | eleq1d 2226 | . . . . . . 7 ⊢ (𝑥 = 𝑧 → ((𝐹‘𝑥) ∈ ℝ ↔ (𝐹‘𝑧) ∈ ℝ)) |
3 | ivth.8 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ) | |
4 | 3 | ralrimiva 2530 | . . . . . . . 8 ⊢ (𝜑 → ∀𝑥 ∈ (𝐴[,]𝐵)(𝐹‘𝑥) ∈ ℝ) |
5 | 4 | adantr 274 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → ∀𝑥 ∈ (𝐴[,]𝐵)(𝐹‘𝑥) ∈ ℝ) |
6 | fveq2 5468 | . . . . . . . . . . . 12 ⊢ (𝑤 = 𝑧 → (𝐹‘𝑤) = (𝐹‘𝑧)) | |
7 | 6 | breq1d 3975 | . . . . . . . . . . 11 ⊢ (𝑤 = 𝑧 → ((𝐹‘𝑤) < 𝑈 ↔ (𝐹‘𝑧) < 𝑈)) |
8 | ivthinclem.l | . . . . . . . . . . 11 ⊢ 𝐿 = {𝑤 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑤) < 𝑈} | |
9 | 7, 8 | elrab2 2871 | . . . . . . . . . 10 ⊢ (𝑧 ∈ 𝐿 ↔ (𝑧 ∈ (𝐴[,]𝐵) ∧ (𝐹‘𝑧) < 𝑈)) |
10 | 9 | biimpi 119 | . . . . . . . . 9 ⊢ (𝑧 ∈ 𝐿 → (𝑧 ∈ (𝐴[,]𝐵) ∧ (𝐹‘𝑧) < 𝑈)) |
11 | 10 | adantl 275 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → (𝑧 ∈ (𝐴[,]𝐵) ∧ (𝐹‘𝑧) < 𝑈)) |
12 | 11 | simpld 111 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → 𝑧 ∈ (𝐴[,]𝐵)) |
13 | 2, 5, 12 | rspcdva 2821 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → (𝐹‘𝑧) ∈ ℝ) |
14 | ivth.3 | . . . . . . 7 ⊢ (𝜑 → 𝑈 ∈ ℝ) | |
15 | 14 | adantr 274 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → 𝑈 ∈ ℝ) |
16 | 11 | simprd 113 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → (𝐹‘𝑧) < 𝑈) |
17 | 13, 15, 16 | ltnsymd 7995 | . . . . 5 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → ¬ 𝑈 < (𝐹‘𝑧)) |
18 | 17 | intnand 917 | . . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → ¬ (𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑈 < (𝐹‘𝑧))) |
19 | 6 | breq2d 3977 | . . . . 5 ⊢ (𝑤 = 𝑧 → (𝑈 < (𝐹‘𝑤) ↔ 𝑈 < (𝐹‘𝑧))) |
20 | ivthinclem.r | . . . . 5 ⊢ 𝑅 = {𝑤 ∈ (𝐴[,]𝐵) ∣ 𝑈 < (𝐹‘𝑤)} | |
21 | 19, 20 | elrab2 2871 | . . . 4 ⊢ (𝑧 ∈ 𝑅 ↔ (𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑈 < (𝐹‘𝑧))) |
22 | 18, 21 | sylnibr 667 | . . 3 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐿) → ¬ 𝑧 ∈ 𝑅) |
23 | 22 | ralrimiva 2530 | . 2 ⊢ (𝜑 → ∀𝑧 ∈ 𝐿 ¬ 𝑧 ∈ 𝑅) |
24 | disj 3442 | . 2 ⊢ ((𝐿 ∩ 𝑅) = ∅ ↔ ∀𝑧 ∈ 𝐿 ¬ 𝑧 ∈ 𝑅) | |
25 | 23, 24 | sylibr 133 | 1 ⊢ (𝜑 → (𝐿 ∩ 𝑅) = ∅) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 = wceq 1335 ∈ wcel 2128 ∀wral 2435 {crab 2439 ∩ cin 3101 ⊆ wss 3102 ∅c0 3394 class class class wbr 3965 ‘cfv 5170 (class class class)co 5824 ℂcc 7730 ℝcr 7731 < clt 7912 [,]cicc 9795 –cn→ccncf 12968 |
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 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-sep 4082 ax-pow 4135 ax-pr 4169 ax-un 4393 ax-setind 4496 ax-cnex 7823 ax-resscn 7824 ax-pre-ltirr 7844 ax-pre-lttrn 7846 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-nel 2423 df-ral 2440 df-rex 2441 df-rab 2444 df-v 2714 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-nul 3395 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-br 3966 df-opab 4026 df-xp 4592 df-cnv 4594 df-iota 5135 df-fv 5178 df-pnf 7914 df-mnf 7915 df-xr 7916 df-ltxr 7917 df-le 7918 |
This theorem is referenced by: ivthinclemex 13031 |
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