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| Mirrors > Home > ILE Home > Th. List > georeclim | 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 | 1 | abscld 11802 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ) |
| 3 | 0red 8223 | . . . . . . 7 ⊢ (𝜑 → 0 ∈ ℝ) | |
| 4 | 1red 8237 | . . . . . . 7 ⊢ (𝜑 → 1 ∈ ℝ) | |
| 5 | 0lt1 8349 | . . . . . . . 8 ⊢ 0 < 1 | |
| 6 | 5 | a1i 9 | . . . . . . 7 ⊢ (𝜑 → 0 < 1) |
| 7 | georeclim.2 | . . . . . . 7 ⊢ (𝜑 → 1 < (abs‘𝐴)) | |
| 8 | 3, 4, 2, 6, 7 | lttrd 8348 | . . . . . 6 ⊢ (𝜑 → 0 < (abs‘𝐴)) |
| 9 | 2, 8 | gt0ap0d 8852 | . . . . 5 ⊢ (𝜑 → (abs‘𝐴) # 0) |
| 10 | abs00ap 11683 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → ((abs‘𝐴) # 0 ↔ 𝐴 # 0)) | |
| 11 | 1, 10 | syl 14 | . . . . 5 ⊢ (𝜑 → ((abs‘𝐴) # 0 ↔ 𝐴 # 0)) |
| 12 | 9, 11 | mpbid 147 | . . . 4 ⊢ (𝜑 → 𝐴 # 0) |
| 13 | 1, 12 | recclapd 9004 | . . 3 ⊢ (𝜑 → (1 / 𝐴) ∈ ℂ) |
| 14 | 1cnd 8238 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 15 | 14, 1, 12 | absdivapd 11816 | . . . . 5 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = ((abs‘1) / (abs‘𝐴))) |
| 16 | abs1 11693 | . . . . . 6 ⊢ (abs‘1) = 1 | |
| 17 | 16 | oveq1i 6038 | . . . . 5 ⊢ ((abs‘1) / (abs‘𝐴)) = (1 / (abs‘𝐴)) |
| 18 | 15, 17 | eqtrdi 2280 | . . . 4 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = (1 / (abs‘𝐴))) |
| 19 | 2, 8 | elrpd 9971 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ+) |
| 20 | 19 | recgt1d 9989 | . . . . 5 ⊢ (𝜑 → (1 < (abs‘𝐴) ↔ (1 / (abs‘𝐴)) < 1)) |
| 21 | 7, 20 | mpbid 147 | . . . 4 ⊢ (𝜑 → (1 / (abs‘𝐴)) < 1) |
| 22 | 18, 21 | eqbrtrd 4115 | . . 3 ⊢ (𝜑 → (abs‘(1 / 𝐴)) < 1) |
| 23 | georeclim.3 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘𝑘) = ((1 / 𝐴)↑𝑘)) | |
| 24 | 13, 22, 23 | geolim 12133 | . 2 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (1 / (1 − (1 / 𝐴)))) |
| 25 | 1, 14, 1, 12 | divsubdirapd 9053 | . . . . 5 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = ((𝐴 / 𝐴) − (1 / 𝐴))) |
| 26 | 1, 12 | dividapd 9009 | . . . . . 6 ⊢ (𝜑 → (𝐴 / 𝐴) = 1) |
| 27 | 26 | oveq1d 6043 | . . . . 5 ⊢ (𝜑 → ((𝐴 / 𝐴) − (1 / 𝐴)) = (1 − (1 / 𝐴))) |
| 28 | 25, 27 | eqtrd 2264 | . . . 4 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = (1 − (1 / 𝐴))) |
| 29 | 28 | oveq2d 6044 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (1 / (1 − (1 / 𝐴)))) |
| 30 | ax-1cn 8168 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 31 | subcl 8421 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ) | |
| 32 | 1, 30, 31 | sylancl 413 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) ∈ ℂ) |
| 33 | 4, 6 | elrpd 9971 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℝ+) |
| 34 | 1, 33, 7 | absgtap 12132 | . . . . 5 ⊢ (𝜑 → 𝐴 # 1) |
| 35 | 1, 14, 34 | subap0d 8867 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) # 0) |
| 36 | 32, 1, 35, 12 | recdivapd 9030 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (𝐴 / (𝐴 − 1))) |
| 37 | 29, 36 | eqtr3d 2266 | . 2 ⊢ (𝜑 → (1 / (1 − (1 / 𝐴))) = (𝐴 / (𝐴 − 1))) |
| 38 | 24, 37 | breqtrd 4119 | 1 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (𝐴 / (𝐴 − 1))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1398 ∈ wcel 2202 class class class wbr 4093 ‘cfv 5333 (class class class)co 6028 ℂcc 8073 0cc0 8075 1c1 8076 + caddc 8078 < clt 8257 − cmin 8393 # cap 8804 / cdiv 8895 ℕ0cn0 9445 seqcseq 10753 ↑cexp 10844 abscabs 11618 ⇝ cli 11899 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-nul 4220 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-iinf 4692 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-mulrcl 8174 ax-addcom 8175 ax-mulcom 8176 ax-addass 8177 ax-mulass 8178 ax-distr 8179 ax-i2m1 8180 ax-0lt1 8181 ax-1rid 8182 ax-0id 8183 ax-rnegex 8184 ax-precex 8185 ax-cnre 8186 ax-pre-ltirr 8187 ax-pre-ltwlin 8188 ax-pre-lttrn 8189 ax-pre-apti 8190 ax-pre-ltadd 8191 ax-pre-mulgt0 8192 ax-pre-mulext 8193 ax-arch 8194 ax-caucvg 8195 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-reu 2518 df-rmo 2519 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-if 3608 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-iun 3977 df-br 4094 df-opab 4156 df-mpt 4157 df-tr 4193 df-id 4396 df-po 4399 df-iso 4400 df-iord 4469 df-on 4471 df-ilim 4472 df-suc 4474 df-iom 4695 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 df-isom 5342 df-riota 5981 df-ov 6031 df-oprab 6032 df-mpo 6033 df-1st 6312 df-2nd 6313 df-recs 6514 df-irdg 6579 df-frec 6600 df-1o 6625 df-oadd 6629 df-er 6745 df-en 6953 df-dom 6954 df-fin 6955 df-pnf 8259 df-mnf 8260 df-xr 8261 df-ltxr 8262 df-le 8263 df-sub 8395 df-neg 8396 df-reap 8798 df-ap 8805 df-div 8896 df-inn 9187 df-2 9245 df-3 9246 df-4 9247 df-n0 9446 df-z 9523 df-uz 9799 df-q 9897 df-rp 9932 df-fz 10287 df-fzo 10421 df-seqfrec 10754 df-exp 10845 df-ihash 11082 df-cj 11463 df-re 11464 df-im 11465 df-rsqrt 11619 df-abs 11620 df-clim 11900 df-sumdc 11975 |
| This theorem is referenced by: geoisumr 12140 ege2le3 12293 eftlub 12312 |
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