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| Mirrors > Home > MPE Home > Th. List > georeclim | Structured version Visualization version GIF version | ||
| Description: The limit of a geometric series of reciprocals. (Contributed by Paul Chapman, 28-Dec-2007.) (Revised by Mario Carneiro, 26-Apr-2014.) |
| Ref | Expression |
|---|---|
| georeclim.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| georeclim.2 | ⊢ (𝜑 → 1 < (abs‘𝐴)) |
| georeclim.3 | ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘𝑘) = ((1 / 𝐴)↑𝑘)) |
| Ref | Expression |
|---|---|
| georeclim | ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (𝐴 / (𝐴 − 1))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | georeclim.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | georeclim.2 | . . . . 5 ⊢ (𝜑 → 1 < (abs‘𝐴)) | |
| 3 | 0le1 11733 | . . . . . . . 8 ⊢ 0 ≤ 1 | |
| 4 | 0re 11206 | . . . . . . . . 9 ⊢ 0 ∈ ℝ | |
| 5 | 1re 11204 | . . . . . . . . 9 ⊢ 1 ∈ ℝ | |
| 6 | 4, 5 | lenlti 11326 | . . . . . . . 8 ⊢ (0 ≤ 1 ↔ ¬ 1 < 0) |
| 7 | 3, 6 | mpbi 233 | . . . . . . 7 ⊢ ¬ 1 < 0 |
| 8 | fveq2 6879 | . . . . . . . . 9 ⊢ (𝐴 = 0 → (abs‘𝐴) = (abs‘0)) | |
| 9 | abs0 15332 | . . . . . . . . 9 ⊢ (abs‘0) = 0 | |
| 10 | 8, 9 | eqtrdi 2820 | . . . . . . . 8 ⊢ (𝐴 = 0 → (abs‘𝐴) = 0) |
| 11 | 10 | breq2d 5122 | . . . . . . 7 ⊢ (𝐴 = 0 → (1 < (abs‘𝐴) ↔ 1 < 0)) |
| 12 | 7, 11 | mtbiri 330 | . . . . . 6 ⊢ (𝐴 = 0 → ¬ 1 < (abs‘𝐴)) |
| 13 | 12 | necon2ai 2993 | . . . . 5 ⊢ (1 < (abs‘𝐴) → 𝐴 ≠ 0) |
| 14 | 2, 13 | syl 18 | . . . 4 ⊢ (𝜑 → 𝐴 ≠ 0) |
| 15 | 1, 14 | reccld 11980 | . . 3 ⊢ (𝜑 → (1 / 𝐴) ∈ ℂ) |
| 16 | 1cnd 11198 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 17 | 16, 1, 14 | absdivd 15505 | . . . . 5 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = ((abs‘1) / (abs‘𝐴))) |
| 18 | abs1 15344 | . . . . . 6 ⊢ (abs‘1) = 1 | |
| 19 | 18 | oveq1i 7418 | . . . . 5 ⊢ ((abs‘1) / (abs‘𝐴)) = (1 / (abs‘𝐴)) |
| 20 | 17, 19 | eqtrdi 2820 | . . . 4 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = (1 / (abs‘𝐴))) |
| 21 | 1, 14 | absrpcld 15498 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ+) |
| 22 | 21 | recgt1d 13070 | . . . . 5 ⊢ (𝜑 → (1 < (abs‘𝐴) ↔ (1 / (abs‘𝐴)) < 1)) |
| 23 | 2, 22 | mpbid 235 | . . . 4 ⊢ (𝜑 → (1 / (abs‘𝐴)) < 1) |
| 24 | 20, 23 | eqbrtrd 5134 | . . 3 ⊢ (𝜑 → (abs‘(1 / 𝐴)) < 1) |
| 25 | georeclim.3 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘𝑘) = ((1 / 𝐴)↑𝑘)) | |
| 26 | 15, 24, 25 | geolim 15920 | . 2 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (1 / (1 − (1 / 𝐴)))) |
| 27 | 1, 16, 1, 14 | divsubdird 12026 | . . . . 5 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = ((𝐴 / 𝐴) − (1 / 𝐴))) |
| 28 | 1, 14 | dividd 11985 | . . . . . 6 ⊢ (𝜑 → (𝐴 / 𝐴) = 1) |
| 29 | 28 | oveq1d 7423 | . . . . 5 ⊢ (𝜑 → ((𝐴 / 𝐴) − (1 / 𝐴)) = (1 − (1 / 𝐴))) |
| 30 | 27, 29 | eqtrd 2804 | . . . 4 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = (1 − (1 / 𝐴))) |
| 31 | 30 | oveq2d 7424 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (1 / (1 − (1 / 𝐴)))) |
| 32 | ax-1cn 11154 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 33 | subcl 11452 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ) | |
| 34 | 1, 32, 33 | sylancl 597 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) ∈ ℂ) |
| 35 | 5 | ltnri 11315 | . . . . . . . 8 ⊢ ¬ 1 < 1 |
| 36 | fveq2 6879 | . . . . . . . . . 10 ⊢ (𝐴 = 1 → (abs‘𝐴) = (abs‘1)) | |
| 37 | 36, 18 | eqtrdi 2820 | . . . . . . . . 9 ⊢ (𝐴 = 1 → (abs‘𝐴) = 1) |
| 38 | 37 | breq2d 5122 | . . . . . . . 8 ⊢ (𝐴 = 1 → (1 < (abs‘𝐴) ↔ 1 < 1)) |
| 39 | 35, 38 | mtbiri 330 | . . . . . . 7 ⊢ (𝐴 = 1 → ¬ 1 < (abs‘𝐴)) |
| 40 | 39 | necon2ai 2993 | . . . . . 6 ⊢ (1 < (abs‘𝐴) → 𝐴 ≠ 1) |
| 41 | 2, 40 | syl 18 | . . . . 5 ⊢ (𝜑 → 𝐴 ≠ 1) |
| 42 | subeq0 11480 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝐴 − 1) = 0 ↔ 𝐴 = 1)) | |
| 43 | 1, 32, 42 | sylancl 597 | . . . . . 6 ⊢ (𝜑 → ((𝐴 − 1) = 0 ↔ 𝐴 = 1)) |
| 44 | 43 | necon3bid 3008 | . . . . 5 ⊢ (𝜑 → ((𝐴 − 1) ≠ 0 ↔ 𝐴 ≠ 1)) |
| 45 | 41, 44 | mpbird 260 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) ≠ 0) |
| 46 | 34, 1, 45, 14 | recdivd 12004 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (𝐴 / (𝐴 − 1))) |
| 47 | 31, 46 | eqtr3d 2806 | . 2 ⊢ (𝜑 → (1 / (1 − (1 / 𝐴))) = (𝐴 / (𝐴 − 1))) |
| 48 | 26, 47 | breqtrd 5138 | 1 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (𝐴 / (𝐴 − 1))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ≠ wne 2964 class class class wbr 5110 ‘cfv 6533 (class class class)co 7408 ℂcc 11094 0cc0 11096 1c1 11097 + caddc 11099 < clt 11239 ≤ cle 11240 − cmin 11437 / cdiv 11867 ℕ0cn0 12500 seqcseq 14033 ↑cexp 14093 abscabs 15281 ⇝ cli 15531 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5239 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-inf2 9606 ax-cnex 11152 ax-resscn 11153 ax-1cn 11154 ax-icn 11155 ax-addcl 11156 ax-addrcl 11157 ax-mulcl 11158 ax-mulrcl 11159 ax-mulcom 11160 ax-addass 11161 ax-mulass 11162 ax-distr 11163 ax-i2m1 11164 ax-1ne0 11165 ax-1rid 11166 ax-rnegex 11167 ax-rrecex 11168 ax-cnre 11169 ax-pre-lttri 11170 ax-pre-lttrn 11171 ax-pre-ltadd 11172 ax-pre-mulgt0 11173 ax-pre-sup 11174 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-int 4914 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-se 5613 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-isom 6542 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-er 8690 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9398 df-inf 9399 df-oi 9468 df-card 9921 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 df-sub 11439 df-neg 11440 df-div 11868 df-nn 12230 df-2 12299 df-3 12300 df-n0 12501 df-z 12588 df-uz 12859 df-rp 13013 df-fz 13532 df-fzo 13679 df-fl 13821 df-seq 14034 df-exp 14094 df-hash 14363 df-cj 15146 df-re 15147 df-im 15148 df-sqrt 15282 df-abs 15283 df-clim 15535 df-rlim 15536 df-sum 15734 |
| This theorem is referenced by: geoisumr 15928 ege2le3 16140 eftlub 16161 |
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