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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 11862 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ) |
| 3 | 0red 8274 | . . . . . . 7 ⊢ (𝜑 → 0 ∈ ℝ) | |
| 4 | 1red 8288 | . . . . . . 7 ⊢ (𝜑 → 1 ∈ ℝ) | |
| 5 | 0lt1 8399 | . . . . . . . 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 8398 | . . . . . 6 ⊢ (𝜑 → 0 < (abs‘𝐴)) |
| 9 | 2, 8 | gt0ap0d 8902 | . . . . 5 ⊢ (𝜑 → (abs‘𝐴) # 0) |
| 10 | abs00ap 11743 | . . . . . 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 9054 | . . 3 ⊢ (𝜑 → (1 / 𝐴) ∈ ℂ) |
| 14 | 1cnd 8289 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 15 | 14, 1, 12 | absdivapd 11876 | . . . . 5 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = ((abs‘1) / (abs‘𝐴))) |
| 16 | abs1 11753 | . . . . . 6 ⊢ (abs‘1) = 1 | |
| 17 | 16 | oveq1i 6059 | . . . . 5 ⊢ ((abs‘1) / (abs‘𝐴)) = (1 / (abs‘𝐴)) |
| 18 | 15, 17 | eqtrdi 2281 | . . . 4 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = (1 / (abs‘𝐴))) |
| 19 | 2, 8 | elrpd 10025 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ+) |
| 20 | 19 | recgt1d 10043 | . . . . 5 ⊢ (𝜑 → (1 < (abs‘𝐴) ↔ (1 / (abs‘𝐴)) < 1)) |
| 21 | 7, 20 | mpbid 147 | . . . 4 ⊢ (𝜑 → (1 / (abs‘𝐴)) < 1) |
| 22 | 18, 21 | eqbrtrd 4130 | . . 3 ⊢ (𝜑 → (abs‘(1 / 𝐴)) < 1) |
| 23 | georeclim.3 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘𝑘) = ((1 / 𝐴)↑𝑘)) | |
| 24 | 13, 22, 23 | geolim 12193 | . 2 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (1 / (1 − (1 / 𝐴)))) |
| 25 | 1, 14, 1, 12 | divsubdirapd 9103 | . . . . 5 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = ((𝐴 / 𝐴) − (1 / 𝐴))) |
| 26 | 1, 12 | dividapd 9059 | . . . . . 6 ⊢ (𝜑 → (𝐴 / 𝐴) = 1) |
| 27 | 26 | oveq1d 6064 | . . . . 5 ⊢ (𝜑 → ((𝐴 / 𝐴) − (1 / 𝐴)) = (1 − (1 / 𝐴))) |
| 28 | 25, 27 | eqtrd 2265 | . . . 4 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = (1 − (1 / 𝐴))) |
| 29 | 28 | oveq2d 6065 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (1 / (1 − (1 / 𝐴)))) |
| 30 | ax-1cn 8219 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 31 | subcl 8471 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ) | |
| 32 | 1, 30, 31 | sylancl 413 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) ∈ ℂ) |
| 33 | 4, 6 | elrpd 10025 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℝ+) |
| 34 | 1, 33, 7 | absgtap 12192 | . . . . 5 ⊢ (𝜑 → 𝐴 # 1) |
| 35 | 1, 14, 34 | subap0d 8917 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) # 0) |
| 36 | 32, 1, 35, 12 | recdivapd 9080 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (𝐴 / (𝐴 − 1))) |
| 37 | 29, 36 | eqtr3d 2267 | . 2 ⊢ (𝜑 → (1 / (1 − (1 / 𝐴))) = (𝐴 / (𝐴 − 1))) |
| 38 | 24, 37 | breqtrd 4134 | 1 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (𝐴 / (𝐴 − 1))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1398 ∈ wcel 2203 class class class wbr 4108 ‘cfv 5351 (class class class)co 6049 ℂcc 8124 0cc0 8126 1c1 8127 + caddc 8129 < clt 8307 − cmin 8443 # cap 8854 / cdiv 8945 ℕ0cn0 9495 seqcseq 10808 ↑cexp 10899 abscabs 11678 ⇝ cli 11959 |
| 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 2205 ax-14 2206 ax-ext 2214 ax-coll 4224 ax-sep 4227 ax-nul 4235 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-iinf 4709 ax-cnex 8217 ax-resscn 8218 ax-1cn 8219 ax-1re 8220 ax-icn 8221 ax-addcl 8222 ax-addrcl 8223 ax-mulcl 8224 ax-mulrcl 8225 ax-addcom 8226 ax-mulcom 8227 ax-addass 8228 ax-mulass 8229 ax-distr 8230 ax-i2m1 8231 ax-0lt1 8232 ax-1rid 8233 ax-0id 8234 ax-rnegex 8235 ax-precex 8236 ax-cnre 8237 ax-pre-ltirr 8238 ax-pre-ltwlin 8239 ax-pre-lttrn 8240 ax-pre-apti 8241 ax-pre-ltadd 8242 ax-pre-mulgt0 8243 ax-pre-mulext 8244 ax-arch 8245 ax-caucvg 8246 |
| 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 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-reu 2527 df-rmo 2528 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-if 3620 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-iun 3992 df-br 4109 df-opab 4171 df-mpt 4172 df-tr 4208 df-id 4413 df-po 4416 df-iso 4417 df-iord 4486 df-on 4488 df-ilim 4489 df-suc 4491 df-iom 4712 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-f1 5356 df-fo 5357 df-f1o 5358 df-fv 5359 df-isom 5360 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-1st 6333 df-2nd 6334 df-recs 6535 df-irdg 6600 df-frec 6621 df-1o 6646 df-oadd 6650 df-er 6766 df-en 6975 df-dom 6976 df-fin 6977 df-pnf 8309 df-mnf 8310 df-xr 8311 df-ltxr 8312 df-le 8313 df-sub 8445 df-neg 8446 df-reap 8848 df-ap 8855 df-div 8946 df-inn 9237 df-2 9295 df-3 9296 df-4 9297 df-n0 9496 df-z 9577 df-uz 9853 df-q 9951 df-rp 9986 df-fz 10342 df-fzo 10476 df-seqfrec 10809 df-exp 10900 df-ihash 11137 df-cj 11523 df-re 11524 df-im 11525 df-rsqrt 11679 df-abs 11680 df-clim 11960 df-sumdc 12035 |
| This theorem is referenced by: geoisumr 12200 ege2le3 12353 eftlub 12372 |
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