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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 10985 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ) |
3 | 0red 7791 | . . . . . . 7 ⊢ (𝜑 → 0 ∈ ℝ) | |
4 | 1red 7805 | . . . . . . 7 ⊢ (𝜑 → 1 ∈ ℝ) | |
5 | 0lt1 7913 | . . . . . . . 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 7912 | . . . . . 6 ⊢ (𝜑 → 0 < (abs‘𝐴)) |
9 | 2, 8 | gt0ap0d 8415 | . . . . 5 ⊢ (𝜑 → (abs‘𝐴) # 0) |
10 | abs00ap 10866 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → ((abs‘𝐴) # 0 ↔ 𝐴 # 0)) | |
11 | 1, 10 | syl 14 | . . . . 5 ⊢ (𝜑 → ((abs‘𝐴) # 0 ↔ 𝐴 # 0)) |
12 | 9, 11 | mpbid 146 | . . . 4 ⊢ (𝜑 → 𝐴 # 0) |
13 | 1, 12 | recclapd 8565 | . . 3 ⊢ (𝜑 → (1 / 𝐴) ∈ ℂ) |
14 | 1cnd 7806 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
15 | 14, 1, 12 | absdivapd 10999 | . . . . 5 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = ((abs‘1) / (abs‘𝐴))) |
16 | abs1 10876 | . . . . . 6 ⊢ (abs‘1) = 1 | |
17 | 16 | oveq1i 5792 | . . . . 5 ⊢ ((abs‘1) / (abs‘𝐴)) = (1 / (abs‘𝐴)) |
18 | 15, 17 | eqtrdi 2189 | . . . 4 ⊢ (𝜑 → (abs‘(1 / 𝐴)) = (1 / (abs‘𝐴))) |
19 | 2, 8 | elrpd 9510 | . . . . . 6 ⊢ (𝜑 → (abs‘𝐴) ∈ ℝ+) |
20 | 19 | recgt1d 9528 | . . . . 5 ⊢ (𝜑 → (1 < (abs‘𝐴) ↔ (1 / (abs‘𝐴)) < 1)) |
21 | 7, 20 | mpbid 146 | . . . 4 ⊢ (𝜑 → (1 / (abs‘𝐴)) < 1) |
22 | 18, 21 | eqbrtrd 3958 | . . 3 ⊢ (𝜑 → (abs‘(1 / 𝐴)) < 1) |
23 | georeclim.3 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐹‘𝑘) = ((1 / 𝐴)↑𝑘)) | |
24 | 13, 22, 23 | geolim 11312 | . 2 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (1 / (1 − (1 / 𝐴)))) |
25 | 1, 14, 1, 12 | divsubdirapd 8614 | . . . . 5 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = ((𝐴 / 𝐴) − (1 / 𝐴))) |
26 | 1, 12 | dividapd 8570 | . . . . . 6 ⊢ (𝜑 → (𝐴 / 𝐴) = 1) |
27 | 26 | oveq1d 5797 | . . . . 5 ⊢ (𝜑 → ((𝐴 / 𝐴) − (1 / 𝐴)) = (1 − (1 / 𝐴))) |
28 | 25, 27 | eqtrd 2173 | . . . 4 ⊢ (𝜑 → ((𝐴 − 1) / 𝐴) = (1 − (1 / 𝐴))) |
29 | 28 | oveq2d 5798 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (1 / (1 − (1 / 𝐴)))) |
30 | ax-1cn 7737 | . . . . 5 ⊢ 1 ∈ ℂ | |
31 | subcl 7985 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 − 1) ∈ ℂ) | |
32 | 1, 30, 31 | sylancl 410 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) ∈ ℂ) |
33 | 4, 6 | elrpd 9510 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℝ+) |
34 | 1, 33, 7 | absgtap 11311 | . . . . 5 ⊢ (𝜑 → 𝐴 # 1) |
35 | 1, 14, 34 | subap0d 8430 | . . . 4 ⊢ (𝜑 → (𝐴 − 1) # 0) |
36 | 32, 1, 35, 12 | recdivapd 8591 | . . 3 ⊢ (𝜑 → (1 / ((𝐴 − 1) / 𝐴)) = (𝐴 / (𝐴 − 1))) |
37 | 29, 36 | eqtr3d 2175 | . 2 ⊢ (𝜑 → (1 / (1 − (1 / 𝐴))) = (𝐴 / (𝐴 − 1))) |
38 | 24, 37 | breqtrd 3962 | 1 ⊢ (𝜑 → seq0( + , 𝐹) ⇝ (𝐴 / (𝐴 − 1))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1332 ∈ wcel 1481 class class class wbr 3937 ‘cfv 5131 (class class class)co 5782 ℂcc 7642 0cc0 7644 1c1 7645 + caddc 7647 < clt 7824 − cmin 7957 # cap 8367 / cdiv 8456 ℕ0cn0 9001 seqcseq 10249 ↑cexp 10323 abscabs 10801 ⇝ cli 11079 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-coll 4051 ax-sep 4054 ax-nul 4062 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 ax-iinf 4510 ax-cnex 7735 ax-resscn 7736 ax-1cn 7737 ax-1re 7738 ax-icn 7739 ax-addcl 7740 ax-addrcl 7741 ax-mulcl 7742 ax-mulrcl 7743 ax-addcom 7744 ax-mulcom 7745 ax-addass 7746 ax-mulass 7747 ax-distr 7748 ax-i2m1 7749 ax-0lt1 7750 ax-1rid 7751 ax-0id 7752 ax-rnegex 7753 ax-precex 7754 ax-cnre 7755 ax-pre-ltirr 7756 ax-pre-ltwlin 7757 ax-pre-lttrn 7758 ax-pre-apti 7759 ax-pre-ltadd 7760 ax-pre-mulgt0 7761 ax-pre-mulext 7762 ax-arch 7763 ax-caucvg 7764 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3or 964 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-nel 2405 df-ral 2422 df-rex 2423 df-reu 2424 df-rmo 2425 df-rab 2426 df-v 2691 df-sbc 2914 df-csb 3008 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-nul 3369 df-if 3480 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-int 3780 df-iun 3823 df-br 3938 df-opab 3998 df-mpt 3999 df-tr 4035 df-id 4223 df-po 4226 df-iso 4227 df-iord 4296 df-on 4298 df-ilim 4299 df-suc 4301 df-iom 4513 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-rn 4558 df-res 4559 df-ima 4560 df-iota 5096 df-fun 5133 df-fn 5134 df-f 5135 df-f1 5136 df-fo 5137 df-f1o 5138 df-fv 5139 df-isom 5140 df-riota 5738 df-ov 5785 df-oprab 5786 df-mpo 5787 df-1st 6046 df-2nd 6047 df-recs 6210 df-irdg 6275 df-frec 6296 df-1o 6321 df-oadd 6325 df-er 6437 df-en 6643 df-dom 6644 df-fin 6645 df-pnf 7826 df-mnf 7827 df-xr 7828 df-ltxr 7829 df-le 7830 df-sub 7959 df-neg 7960 df-reap 8361 df-ap 8368 df-div 8457 df-inn 8745 df-2 8803 df-3 8804 df-4 8805 df-n0 9002 df-z 9079 df-uz 9351 df-q 9439 df-rp 9471 df-fz 9822 df-fzo 9951 df-seqfrec 10250 df-exp 10324 df-ihash 10554 df-cj 10646 df-re 10647 df-im 10648 df-rsqrt 10802 df-abs 10803 df-clim 11080 df-sumdc 11155 |
This theorem is referenced by: geoisumr 11319 ege2le3 11414 eftlub 11433 |
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