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| Mirrors > Home > MPE Home > Th. List > ivthlem1 | Structured version Visualization version GIF version | ||
| Description: Lemma for ivth 25503. 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 11225 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| 3 | ivth.2 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 4 | 3 | rexrd 11225 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
| 5 | ivth.4 | . . . . 5 ⊢ (𝜑 → 𝐴 < 𝐵) | |
| 6 | 1, 3, 5 | ltled 11324 | . . . 4 ⊢ (𝜑 → 𝐴 ≤ 𝐵) |
| 7 | lbicc2 13461 | . . . 4 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐴 ≤ 𝐵) → 𝐴 ∈ (𝐴[,]𝐵)) | |
| 8 | 2, 4, 6, 7 | syl3anc 1389 | . . 3 ⊢ (𝜑 → 𝐴 ∈ (𝐴[,]𝐵)) |
| 9 | fveq2 6861 | . . . . . 6 ⊢ (𝑥 = 𝐴 → (𝐹‘𝑥) = (𝐹‘𝐴)) | |
| 10 | 9 | eleq1d 2846 | . . . . 5 ⊢ (𝑥 = 𝐴 → ((𝐹‘𝑥) ∈ ℝ ↔ (𝐹‘𝐴) ∈ ℝ)) |
| 11 | ivth.8 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝐹‘𝑥) ∈ ℝ) | |
| 12 | 11 | ralrimiva 3153 | . . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ (𝐴[,]𝐵)(𝐹‘𝑥) ∈ ℝ) |
| 13 | 10, 12, 8 | rspcdva 3581 | . . . 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 498 | . . . 4 ⊢ (𝜑 → (𝐹‘𝐴) < 𝑈) |
| 17 | 13, 14, 16 | ltled 11324 | . . 3 ⊢ (𝜑 → (𝐹‘𝐴) ≤ 𝑈) |
| 18 | 9 | breq1d 5107 | . . . 4 ⊢ (𝑥 = 𝐴 → ((𝐹‘𝑥) ≤ 𝑈 ↔ (𝐹‘𝐴) ≤ 𝑈)) |
| 19 | ivth.10 | . . . 4 ⊢ 𝑆 = {𝑥 ∈ (𝐴[,]𝐵) ∣ (𝐹‘𝑥) ≤ 𝑈} | |
| 20 | 18, 19 | elrab2 3652 | . . 3 ⊢ (𝐴 ∈ 𝑆 ↔ (𝐴 ∈ (𝐴[,]𝐵) ∧ (𝐹‘𝐴) ≤ 𝑈)) |
| 21 | 8, 17, 20 | sylanbrc 592 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝑆) |
| 22 | 19 | ssrab3 4033 | . . . . 5 ⊢ 𝑆 ⊆ (𝐴[,]𝐵) |
| 23 | 22 | sseli 3930 | . . . 4 ⊢ (𝑧 ∈ 𝑆 → 𝑧 ∈ (𝐴[,]𝐵)) |
| 24 | iccleub 13398 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝑧 ∈ (𝐴[,]𝐵)) → 𝑧 ≤ 𝐵) | |
| 25 | 24 | 3expia 1133 | . . . . 5 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝑧 ∈ (𝐴[,]𝐵) → 𝑧 ≤ 𝐵)) |
| 26 | 2, 4, 25 | syl2anc 593 | . . . 4 ⊢ (𝜑 → (𝑧 ∈ (𝐴[,]𝐵) → 𝑧 ≤ 𝐵)) |
| 27 | 23, 26 | syl5 34 | . . 3 ⊢ (𝜑 → (𝑧 ∈ 𝑆 → 𝑧 ≤ 𝐵)) |
| 28 | 27 | ralrimiv 3152 | . 2 ⊢ (𝜑 → ∀𝑧 ∈ 𝑆 𝑧 ≤ 𝐵) |
| 29 | 21, 28 | jca 519 | 1 ⊢ (𝜑 → (𝐴 ∈ 𝑆 ∧ ∀𝑧 ∈ 𝑆 𝑧 ≤ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 = wceq 1559 ∈ wcel 2141 ∀wral 3075 {crab 3413 ⊆ wss 3902 class class class wbr 5097 ‘cfv 6515 (class class class)co 7390 ℂcc 11064 ℝcr 11065 ℝ*cxr 11208 < clt 11209 ≤ cle 11210 [,]cicc 13345 –cn→ccncf 24925 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-cnex 11122 ax-resscn 11123 ax-pre-lttri 11140 ax-pre-lttrn 11141 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-po 5551 df-so 5552 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-ov 7393 df-oprab 7394 df-mpo 7395 df-er 8671 df-en 8921 df-dom 8922 df-sdom 8923 df-pnf 11211 df-mnf 11212 df-xr 11213 df-ltxr 11214 df-le 11215 df-icc 13349 |
| This theorem is referenced by: ivthlem2 25501 ivthlem3 25502 |
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