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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 11660 | . . . . . . . 8 ⊢ 0 ≤ 1 | |
| 4 | 0re 11134 | . . . . . . . . 9 ⊢ 0 ∈ ℝ | |
| 5 | 1re 11132 | . . . . . . . . 9 ⊢ 1 ∈ ℝ | |
| 6 | 4, 5 | lenlti 11253 | . . . . . . . 8 ⊢ (0 ≤ 1 ↔ ¬ 1 < 0) |
| 7 | 3, 6 | mpbi 230 | . . . . . . 7 ⊢ ¬ 1 < 0 |
| 8 | fveq2 6834 | . . . . . . . . 9 ⊢ (𝐴 = 0 → (abs‘𝐴) = (abs‘0)) | |
| 9 | abs0 15208 | . . . . . . . . 9 ⊢ (abs‘0) = 0 | |
| 10 | 8, 9 | eqtrdi 2787 | . . . . . . . 8 ⊢ (𝐴 = 0 → (abs‘𝐴) = 0) |
| 11 | 10 | breq2d 5110 | . . . . . . 7 ⊢ (𝐴 = 0 → (1 < (abs‘𝐴) ↔ 1 < 0)) |
| 12 | 7, 11 | mtbiri 327 | . . . . . 6 ⊢ (𝐴 = 0 → ¬ 1 < (abs‘𝐴)) |
| 13 | 12 | necon2ai 2961 | . . . . 5 ⊢ (1 < (abs‘𝐴) → 𝐴 ≠ 0) |
| 14 | 2, 13 | syl 17 | . . . 4 ⊢ (𝜑 → 𝐴 ≠ 0) |
| 15 | 1, 14 | reccld 11910 | . . 3 ⊢ (𝜑 → (1 / 𝐴) ∈ ℂ) |
| 16 | 1cnd 11127 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 17 | 16, 1, 14 | absdivd 15381 | . . . . 5 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = ((abs‘1) / (abs‘𝐴))) |
| 18 | abs1 15220 | . . . . . 6 ⊢ (abs‘1) = 1 | |
| 19 | 18 | oveq1i 7368 | . . . . 5 ⊢ ((abs‘1) / (abs‘𝐴)) = (1 / (abs‘𝐴)) |
| 20 | 17, 19 | eqtrdi 2787 | . . . 4 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = (1 / (abs‘𝐴))) |
| 21 | 1, 14 | absrpcld 15374 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ+) |
| 22 | 21 | recgt1d 12963 | . . . . 5 ⊢ (𝜑 → (1 < (abs‘𝐴) ↔ (1 / (abs‘𝐴)) < 1)) |
| 23 | 2, 22 | mpbid 232 | . . . 4 ⊢ (𝜑 → (1 / (abs‘𝐴)) < 1) |
| 24 | 20, 23 | eqbrtrd 5120 | . . 3 ⊢ (𝜑 → (abs‘(1 / 𝐴)) < 1) |
| 25 | georeclim.3 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘𝑘) = ((1 / 𝐴)↑𝑘)) | |
| 26 | 15, 24, 25 | geolim 15793 | . 2 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (1 / (1 − (1 / 𝐴)))) |
| 27 | 1, 16, 1, 14 | divsubdird 11956 | . . . . 5 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = ((𝐴 / 𝐴) − (1 / 𝐴))) |
| 28 | 1, 14 | dividd 11915 | . . . . . 6 ⊢ (𝜑 → (𝐴 / 𝐴) = 1) |
| 29 | 28 | oveq1d 7373 | . . . . 5 ⊢ (𝜑 → ((𝐴 / 𝐴) − (1 / 𝐴)) = (1 − (1 / 𝐴))) |
| 30 | 27, 29 | eqtrd 2771 | . . . 4 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = (1 − (1 / 𝐴))) |
| 31 | 30 | oveq2d 7374 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (1 / (1 − (1 / 𝐴)))) |
| 32 | ax-1cn 11084 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 33 | subcl 11379 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ) | |
| 34 | 1, 32, 33 | sylancl 586 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) ∈ ℂ) |
| 35 | 5 | ltnri 11242 | . . . . . . . 8 ⊢ ¬ 1 < 1 |
| 36 | fveq2 6834 | . . . . . . . . . 10 ⊢ (𝐴 = 1 → (abs‘𝐴) = (abs‘1)) | |
| 37 | 36, 18 | eqtrdi 2787 | . . . . . . . . 9 ⊢ (𝐴 = 1 → (abs‘𝐴) = 1) |
| 38 | 37 | breq2d 5110 | . . . . . . . 8 ⊢ (𝐴 = 1 → (1 < (abs‘𝐴) ↔ 1 < 1)) |
| 39 | 35, 38 | mtbiri 327 | . . . . . . 7 ⊢ (𝐴 = 1 → ¬ 1 < (abs‘𝐴)) |
| 40 | 39 | necon2ai 2961 | . . . . . 6 ⊢ (1 < (abs‘𝐴) → 𝐴 ≠ 1) |
| 41 | 2, 40 | syl 17 | . . . . 5 ⊢ (𝜑 → 𝐴 ≠ 1) |
| 42 | subeq0 11407 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝐴 − 1) = 0 ↔ 𝐴 = 1)) | |
| 43 | 1, 32, 42 | sylancl 586 | . . . . . 6 ⊢ (𝜑 → ((𝐴 − 1) = 0 ↔ 𝐴 = 1)) |
| 44 | 43 | necon3bid 2976 | . . . . 5 ⊢ (𝜑 → ((𝐴 − 1) ≠ 0 ↔ 𝐴 ≠ 1)) |
| 45 | 41, 44 | mpbird 257 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) ≠ 0) |
| 46 | 34, 1, 45, 14 | recdivd 11934 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (𝐴 / (𝐴 − 1))) |
| 47 | 31, 46 | eqtr3d 2773 | . 2 ⊢ (𝜑 → (1 / (1 − (1 / 𝐴))) = (𝐴 / (𝐴 − 1))) |
| 48 | 26, 47 | breqtrd 5124 | 1 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (𝐴 / (𝐴 − 1))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ≠ wne 2932 class class class wbr 5098 ‘cfv 6492 (class class class)co 7358 ℂcc 11024 0cc0 11026 1c1 11027 + caddc 11029 < clt 11166 ≤ cle 11167 − cmin 11364 / cdiv 11794 ℕ0cn0 12401 seqcseq 13924 ↑cexp 13984 abscabs 15157 ⇝ cli 15407 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-inf2 9550 ax-cnex 11082 ax-resscn 11083 ax-1cn 11084 ax-icn 11085 ax-addcl 11086 ax-addrcl 11087 ax-mulcl 11088 ax-mulrcl 11089 ax-mulcom 11090 ax-addass 11091 ax-mulass 11092 ax-distr 11093 ax-i2m1 11094 ax-1ne0 11095 ax-1rid 11096 ax-rnegex 11097 ax-rrecex 11098 ax-cnre 11099 ax-pre-lttri 11100 ax-pre-lttrn 11101 ax-pre-ltadd 11102 ax-pre-mulgt0 11103 ax-pre-sup 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-int 4903 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-se 5578 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 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-isom 6501 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-1o 8397 df-er 8635 df-pm 8766 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-sup 9345 df-inf 9346 df-oi 9415 df-card 9851 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 df-sub 11366 df-neg 11367 df-div 11795 df-nn 12146 df-2 12208 df-3 12209 df-n0 12402 df-z 12489 df-uz 12752 df-rp 12906 df-fz 13424 df-fzo 13571 df-fl 13712 df-seq 13925 df-exp 13985 df-hash 14254 df-cj 15022 df-re 15023 df-im 15024 df-sqrt 15158 df-abs 15159 df-clim 15411 df-rlim 15412 df-sum 15610 |
| This theorem is referenced by: geoisumr 15801 ege2le3 16013 eftlub 16034 |
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