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| Mirrors > Home > MPE Home > Th. List > Mathboxes > knoppndvlem20 | Structured version Visualization version GIF version | ||
| Description: Lemma for knoppndv 36535. (Contributed by Asger C. Ipsen, 18-Aug-2021.) |
| Ref | Expression |
|---|---|
| knoppndvlem20.c | ⊢ (𝜑 → 𝐶 ∈ (-1(,)1)) |
| knoppndvlem20.n | ⊢ (𝜑 → 𝑁 ∈ ℕ) |
| knoppndvlem20.1 | ⊢ (𝜑 → 1 < (𝑁 · (abs‘𝐶))) |
| Ref | Expression |
|---|---|
| knoppndvlem20 | ⊢ (𝜑 → (1 − (1 / (((2 · 𝑁) · (abs‘𝐶)) − 1))) ∈ ℝ+) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | knoppndvlem20.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ (-1(,)1)) | |
| 2 | knoppndvlem20.n | . . . . 5 ⊢ (𝜑 → 𝑁 ∈ ℕ) | |
| 3 | knoppndvlem20.1 | . . . . 5 ⊢ (𝜑 → 1 < (𝑁 · (abs‘𝐶))) | |
| 4 | 1, 2, 3 | knoppndvlem12 36524 | . . . 4 ⊢ (𝜑 → (((2 · 𝑁) · (abs‘𝐶)) ≠ 1 ∧ 1 < (((2 · 𝑁) · (abs‘𝐶)) − 1))) |
| 5 | 4 | simprd 495 | . . 3 ⊢ (𝜑 → 1 < (((2 · 𝑁) · (abs‘𝐶)) − 1)) |
| 6 | 2re 12340 | . . . . . . . . 9 ⊢ 2 ∈ ℝ | |
| 7 | 6 | a1i 11 | . . . . . . . 8 ⊢ (𝜑 → 2 ∈ ℝ) |
| 8 | 2 | nnred 12281 | . . . . . . . 8 ⊢ (𝜑 → 𝑁 ∈ ℝ) |
| 9 | 7, 8 | remulcld 11291 | . . . . . . 7 ⊢ (𝜑 → (2 · 𝑁) ∈ ℝ) |
| 10 | 1 | knoppndvlem3 36515 | . . . . . . . . . 10 ⊢ (𝜑 → (𝐶 ∈ ℝ ∧ (abs‘𝐶) < 1)) |
| 11 | 10 | simpld 494 | . . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| 12 | 11 | recnd 11289 | . . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 13 | 12 | abscld 15475 | . . . . . . 7 ⊢ (𝜑 → (abs‘𝐶) ∈ ℝ) |
| 14 | 9, 13 | remulcld 11291 | . . . . . 6 ⊢ (𝜑 → ((2 · 𝑁) · (abs‘𝐶)) ∈ ℝ) |
| 15 | 1red 11262 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℝ) | |
| 16 | 14, 15 | resubcld 11691 | . . . . 5 ⊢ (𝜑 → (((2 · 𝑁) · (abs‘𝐶)) − 1) ∈ ℝ) |
| 17 | 0red 11264 | . . . . . 6 ⊢ (𝜑 → 0 ∈ ℝ) | |
| 18 | 0lt1 11785 | . . . . . . 7 ⊢ 0 < 1 | |
| 19 | 18 | a1i 11 | . . . . . 6 ⊢ (𝜑 → 0 < 1) |
| 20 | 17, 15, 16, 19, 5 | lttrd 11422 | . . . . 5 ⊢ (𝜑 → 0 < (((2 · 𝑁) · (abs‘𝐶)) − 1)) |
| 21 | 16, 20 | elrpd 13074 | . . . 4 ⊢ (𝜑 → (((2 · 𝑁) · (abs‘𝐶)) − 1) ∈ ℝ+) |
| 22 | 21 | recgt1d 13091 | . . 3 ⊢ (𝜑 → (1 < (((2 · 𝑁) · (abs‘𝐶)) − 1) ↔ (1 / (((2 · 𝑁) · (abs‘𝐶)) − 1)) < 1)) |
| 23 | 5, 22 | mpbid 232 | . 2 ⊢ (𝜑 → (1 / (((2 · 𝑁) · (abs‘𝐶)) − 1)) < 1) |
| 24 | 21 | rprecred 13088 | . . . 4 ⊢ (𝜑 → (1 / (((2 · 𝑁) · (abs‘𝐶)) − 1)) ∈ ℝ) |
| 25 | 24, 15 | jca 511 | . . 3 ⊢ (𝜑 → ((1 / (((2 · 𝑁) · (abs‘𝐶)) − 1)) ∈ ℝ ∧ 1 ∈ ℝ)) |
| 26 | difrp 13073 | . . 3 ⊢ (((1 / (((2 · 𝑁) · (abs‘𝐶)) − 1)) ∈ ℝ ∧ 1 ∈ ℝ) → ((1 / (((2 · 𝑁) · (abs‘𝐶)) − 1)) < 1 ↔ (1 − (1 / (((2 · 𝑁) · (abs‘𝐶)) − 1))) ∈ ℝ+)) | |
| 27 | 25, 26 | syl 17 | . 2 ⊢ (𝜑 → ((1 / (((2 · 𝑁) · (abs‘𝐶)) − 1)) < 1 ↔ (1 − (1 / (((2 · 𝑁) · (abs‘𝐶)) − 1))) ∈ ℝ+)) |
| 28 | 23, 27 | mpbid 232 | 1 ⊢ (𝜑 → (1 − (1 / (((2 · 𝑁) · (abs‘𝐶)) − 1))) ∈ ℝ+) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2108 ≠ wne 2940 class class class wbr 5143 ‘cfv 6561 (class class class)co 7431 ℝcr 11154 0cc0 11155 1c1 11156 · cmul 11160 < clt 11295 − cmin 11492 -cneg 11493 / cdiv 11920 ℕcn 12266 2c2 12321 ℝ+crp 13034 (,)cioo 13387 abscabs 15273 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232 ax-pre-sup 11233 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-op 4633 df-uni 4908 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8014 df-2nd 8015 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-er 8745 df-en 8986 df-dom 8987 df-sdom 8988 df-sup 9482 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-div 11921 df-nn 12267 df-2 12329 df-3 12330 df-n0 12527 df-z 12614 df-uz 12879 df-rp 13035 df-ioo 13391 df-seq 14043 df-exp 14103 df-cj 15138 df-re 15139 df-im 15140 df-sqrt 15274 df-abs 15275 |
| This theorem is referenced by: knoppndvlem21 36533 knoppndvlem22 36534 |
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