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| Mirrors > Home > MPE Home > Th. List > ivthlem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for ivth 25446. The set 𝑆 of all 𝑥 values with (𝐹‘𝑥) less than 𝑈 is lower bounded by 𝐴 and upper bounded by 𝐵. (Contributed by Mario Carneiro, 17-Jun-2014.) |
| 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))) |
| ivth.10 | ⊢ 𝑆 = {𝑥 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑥) ≤ 𝑈} |
| Ref | Expression |
|---|---|
| ivthlem1 | ⊢ (𝜑 → (𝐴 ∈ 𝑆 ∧ ∀𝑧 ∈ 𝑆 𝑧 ≤ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ivth.1 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ ℝ) | |
| 2 | 1 | rexrd 11193 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| 3 | ivth.2 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 4 | 3 | rexrd 11193 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| 5 | ivth.4 | . . . . 5 ⊢ (𝜑 → 𝐴 < 𝐵) | |
| 6 | 1, 3, 5 | ltled 11292 | . . . 4 ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| 7 | lbicc2 13415 | . . . 4 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → 𝐴 ∈ (𝐴[,]𝐵)) | |
| 8 | 2, 4, 6, 7 | syl3anc 1379 | . . 3 ⊢ (𝜑 → 𝐴 ∈ (𝐴[,]𝐵)) |
| 9 | fveq2 6834 | . . . . . 6 ⊢ (𝑥 = 𝐴 → (𝐹‘𝑥) = (𝐹‘𝐴)) | |
| 10 | 9 | eleq1d 2825 | . . . . 5 ⊢ (𝑥 = 𝐴 → ((𝐹‘𝑥) ∈ ℝ ↔ (𝐹‘𝐴) ∈ ℝ)) |
| 11 | ivth.8 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ) | |
| 12 | 11 | ralrimiva 3132 | . . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ (𝐴[,]𝐵)(𝐹‘𝑥) ∈ ℝ) |
| 13 | 10, 12, 8 | rspcdva 3568 | . . . 4 ⊢ (𝜑 → (𝐹‘𝐴) ∈ ℝ) |
| 14 | ivth.3 | . . . 4 ⊢ (𝜑 → 𝑈 ∈ ℝ) | |
| 15 | ivth.9 | . . . . 5 ⊢ (𝜑 → ((𝐹‘𝐴) < 𝑈 ∧ 𝑈 < (𝐹‘𝐵))) | |
| 16 | 15 | simpld 495 | . . . 4 ⊢ (𝜑 → (𝐹‘𝐴) < 𝑈) |
| 17 | 13, 14, 16 | ltled 11292 | . . 3 ⊢ (𝜑 → (𝐹‘𝐴) ≤ 𝑈) |
| 18 | 9 | breq1d 5089 | . . . 4 ⊢ (𝑥 = 𝐴 → ((𝐹‘𝑥) ≤ 𝑈 ↔ (𝐹‘𝐴) ≤ 𝑈)) |
| 19 | ivth.10 | . . . 4 ⊢ 𝑆 = {𝑥 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑥) ≤ 𝑈} | |
| 20 | 18, 19 | elrab2 3639 | . . 3 ⊢ (𝐴 ∈ 𝑆 ↔ (𝐴 ∈ (𝐴[,]𝐵) ∧ (𝐹‘𝐴) ≤ 𝑈)) |
| 21 | 8, 17, 20 | sylanbrc 589 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝑆) |
| 22 | 19 | ssrab3 4020 | . . . . 5 ⊢ 𝑆 ⊆ (𝐴[,]𝐵) |
| 23 | 22 | sseli 3918 | . . . 4 ⊢ (𝑧 ∈ 𝑆 → 𝑧 ∈ (𝐴[,]𝐵)) |
| 24 | iccleub 13352 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝑧 ∈ (𝐴[,]𝐵)) → 𝑧 ≤ 𝐵) | |
| 25 | 24 | 3expia 1127 | . . . . 5 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝑧 ∈ (𝐴[,]𝐵) → 𝑧 ≤ 𝐵)) |
| 26 | 2, 4, 25 | syl2anc 590 | . . . 4 ⊢ (𝜑 → (𝑧 ∈ (𝐴[,]𝐵) → 𝑧 ≤ 𝐵)) |
| 27 | 23, 26 | syl5 34 | . . 3 ⊢ (𝜑 → (𝑧 ∈ 𝑆 → 𝑧 ≤ 𝐵)) |
| 28 | 27 | ralrimiv 3131 | . 2 ⊢ (𝜑 → ∀𝑧 ∈ 𝑆 𝑧 ≤ 𝐵) |
| 29 | 21, 28 | jca 516 | 1 ⊢ (𝜑 → (𝐴 ∈ 𝑆 ∧ ∀𝑧 ∈ 𝑆 𝑧 ≤ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ∀wral 3054 {crab 3392 ⊆ wss 3890 class class class wbr 5079 ‘cfv 6492 (class class class)co 7363 ℂcc 11034 ℝcr 11035 ℝ*cxr 11176 < clt 11177 ≤ cle 11178 [,]cicc 13299 –cn→ccncf 24868 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-cnex 11092 ax-resscn 11093 ax-pre-lttri 11110 ax-pre-lttrn 11111 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-br 5080 df-opab 5142 df-mpt 5161 df-id 5520 df-po 5533 df-so 5534 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7366 df-oprab 7367 df-mpo 7368 df-er 8640 df-en 8891 df-dom 8892 df-sdom 8893 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-icc 13303 |
| This theorem is referenced by: ivthlem2 25444 ivthlem3 25445 |
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