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| Mirrors > Home > ILE Home > Th. List > ivthinclemum | GIF version | ||
| Description: Lemma for ivthinc 15744. The upper cut is bounded. (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 |
|---|---|
| ivthinclemum | ⊢ (𝜑 → ∃𝑟 ∈ (𝐴[,]𝐵)𝑟 ∈ 𝑅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ivth.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | 1 | rexrd 8375 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| 3 | ivth.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 4 | 3 | rexrd 8375 | . . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| 5 | ivth.4 | . . . 4 ⊢ (𝜑 → 𝐴 < 𝐵) | |
| 6 | 1, 3, 5 | ltled 8445 | . . 3 ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| 7 | ubicc2 10387 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → 𝐵 ∈ (𝐴[,]𝐵)) | |
| 8 | 2, 4, 6, 7 | syl3anc 1278 | . 2 ⊢ (𝜑 → 𝐵 ∈ (𝐴[,]𝐵)) |
| 9 | ivth.9 | . . . 4 ⊢ (𝜑 → ((𝐹‘𝐴) < 𝑈 ∧ 𝑈 < (𝐹‘𝐵))) | |
| 10 | 9 | simprd 114 | . . 3 ⊢ (𝜑 → 𝑈 < (𝐹‘𝐵)) |
| 11 | fveq2 5695 | . . . . 5 ⊢ (𝑤 = 𝐵 → (𝐹‘𝑤) = (𝐹‘𝐵)) | |
| 12 | 11 | breq2d 4142 | . . . 4 ⊢ (𝑤 = 𝐵 → (𝑈 < (𝐹‘𝑤) ↔ 𝑈 < (𝐹‘𝐵))) |
| 13 | ivthinclem.r | . . . 4 ⊢ 𝑅 = {𝑤 ∈ (𝐴[,]𝐵) ∣ 𝑈 < (𝐹‘𝑤)} | |
| 14 | 12, 13 | elrab2 2985 | . . 3 ⊢ (𝐵 ∈ 𝑅 ↔ (𝐵 ∈ (𝐴[,]𝐵) ∧ 𝑈 < (𝐹‘𝐵))) |
| 15 | 8, 10, 14 | sylanbrc 421 | . 2 ⊢ (𝜑 → 𝐵 ∈ 𝑅) |
| 16 | eleq1 2301 | . . 3 ⊢ (𝑟 = 𝐵 → (𝑟 ∈ 𝑅 ↔ 𝐵 ∈ 𝑅)) | |
| 17 | 16 | rspcev 2929 | . 2 ⊢ ((𝐵 ∈ (𝐴[,]𝐵) ∧ 𝐵 ∈ 𝑅) → ∃𝑟 ∈ (𝐴[,]𝐵)𝑟 ∈ 𝑅) |
| 18 | 8, 15, 17 | syl2anc 415 | 1 ⊢ (𝜑 → ∃𝑟 ∈ (𝐴[,]𝐵)𝑟 ∈ 𝑅) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 ∃wrex 2529 {crab 2532 ⊆ wss 3220 class class class wbr 4130 ‘cfv 5377 (class class class)co 6085 ℂcc 8177 ℝcr 8178 ℝ*cxr 8359 < clt 8360 ≤ cle 8361 [,]cicc 10293 –cn→ccncf 15671 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-cnex 8270 ax-resscn 8271 ax-pre-ltirr 8291 ax-pre-lttrn 8293 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fv 5385 df-ov 6088 df-oprab 6089 df-mpo 6090 df-pnf 8362 df-mnf 8363 df-xr 8364 df-ltxr 8365 df-le 8366 df-icc 10297 |
| This theorem is used by: ivthinclemex 15743 |
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