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Theorem trireciplem 15454
Description: Lemma for trirecip 15455. Show that the sum converges. (Contributed by Scott Fenton, 22-Apr-2014.) (Revised by Mario Carneiro, 22-May-2014.)
Hypothesis
Ref Expression
trireciplem.1 𝐹 = (𝑛 ∈ ℕ ↦ (1 / (𝑛 · (𝑛 + 1))))
Assertion
Ref Expression
trireciplem seq1( + , 𝐹) ⇝ 1

Proof of Theorem trireciplem
Dummy variables 𝑗 𝑘 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 nnuz 12502 . . . 4 ℕ = (ℤ‘1)
2 1zzd 12233 . . . 4 (⊤ → 1 ∈ ℤ)
3 1cnd 10853 . . . . 5 (⊤ → 1 ∈ ℂ)
4 nnex 11861 . . . . . . 7 ℕ ∈ V
54mptex 7058 . . . . . 6 (𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1))) ∈ V
65a1i 11 . . . . 5 (⊤ → (𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1))) ∈ V)
7 oveq1 7239 . . . . . . . 8 (𝑛 = 𝑘 → (𝑛 + 1) = (𝑘 + 1))
87oveq2d 7248 . . . . . . 7 (𝑛 = 𝑘 → (1 / (𝑛 + 1)) = (1 / (𝑘 + 1)))
9 eqid 2738 . . . . . . 7 (𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1))) = (𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1)))
10 ovex 7265 . . . . . . 7 (1 / (𝑘 + 1)) ∈ V
118, 9, 10fvmpt 6837 . . . . . 6 (𝑘 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1)))‘𝑘) = (1 / (𝑘 + 1)))
1211adantl 485 . . . . 5 ((⊤ ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1)))‘𝑘) = (1 / (𝑘 + 1)))
131, 2, 3, 2, 6, 12divcnvshft 15447 . . . 4 (⊤ → (𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1))) ⇝ 0)
14 seqex 13603 . . . . 5 seq1( + , 𝐹) ∈ V
1514a1i 11 . . . 4 (⊤ → seq1( + , 𝐹) ∈ V)
16 peano2nn 11867 . . . . . . . 8 (𝑘 ∈ ℕ → (𝑘 + 1) ∈ ℕ)
1716adantl 485 . . . . . . 7 ((⊤ ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ ℕ)
1817nnrecred 11906 . . . . . 6 ((⊤ ∧ 𝑘 ∈ ℕ) → (1 / (𝑘 + 1)) ∈ ℝ)
1918recnd 10886 . . . . 5 ((⊤ ∧ 𝑘 ∈ ℕ) → (1 / (𝑘 + 1)) ∈ ℂ)
2012, 19eqeltrd 2839 . . . 4 ((⊤ ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1)))‘𝑘) ∈ ℂ)
2112oveq2d 7248 . . . . 5 ((⊤ ∧ 𝑘 ∈ ℕ) → (1 − ((𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1)))‘𝑘)) = (1 − (1 / (𝑘 + 1))))
22 elfznn 13166 . . . . . . . . . . . 12 (𝑗 ∈ (1...𝑘) → 𝑗 ∈ ℕ)
2322adantl 485 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → 𝑗 ∈ ℕ)
2423nncnd 11871 . . . . . . . . . 10 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → 𝑗 ∈ ℂ)
25 peano2cn 11029 . . . . . . . . . 10 (𝑗 ∈ ℂ → (𝑗 + 1) ∈ ℂ)
2624, 25syl 17 . . . . . . . . 9 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 + 1) ∈ ℂ)
27 peano2nn 11867 . . . . . . . . . . . 12 (𝑗 ∈ ℕ → (𝑗 + 1) ∈ ℕ)
2823, 27syl 17 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 + 1) ∈ ℕ)
2923, 28nnmulcld 11908 . . . . . . . . . 10 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 · (𝑗 + 1)) ∈ ℕ)
3029nncnd 11871 . . . . . . . . 9 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 · (𝑗 + 1)) ∈ ℂ)
3129nnne0d 11905 . . . . . . . . 9 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 · (𝑗 + 1)) ≠ 0)
3226, 24, 30, 31divsubdird 11672 . . . . . . . 8 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (((𝑗 + 1) − 𝑗) / (𝑗 · (𝑗 + 1))) = (((𝑗 + 1) / (𝑗 · (𝑗 + 1))) − (𝑗 / (𝑗 · (𝑗 + 1)))))
33 ax-1cn 10812 . . . . . . . . . 10 1 ∈ ℂ
34 pncan2 11110 . . . . . . . . . 10 ((𝑗 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑗 + 1) − 𝑗) = 1)
3524, 33, 34sylancl 589 . . . . . . . . 9 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → ((𝑗 + 1) − 𝑗) = 1)
3635oveq1d 7247 . . . . . . . 8 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (((𝑗 + 1) − 𝑗) / (𝑗 · (𝑗 + 1))) = (1 / (𝑗 · (𝑗 + 1))))
3726mulid1d 10875 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → ((𝑗 + 1) · 1) = (𝑗 + 1))
3826, 24mulcomd 10879 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → ((𝑗 + 1) · 𝑗) = (𝑗 · (𝑗 + 1)))
3937, 38oveq12d 7250 . . . . . . . . . 10 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (((𝑗 + 1) · 1) / ((𝑗 + 1) · 𝑗)) = ((𝑗 + 1) / (𝑗 · (𝑗 + 1))))
40 1cnd 10853 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → 1 ∈ ℂ)
4123nnne0d 11905 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → 𝑗 ≠ 0)
4228nnne0d 11905 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 + 1) ≠ 0)
4340, 24, 26, 41, 42divcan5d 11659 . . . . . . . . . 10 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (((𝑗 + 1) · 1) / ((𝑗 + 1) · 𝑗)) = (1 / 𝑗))
4439, 43eqtr3d 2780 . . . . . . . . 9 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → ((𝑗 + 1) / (𝑗 · (𝑗 + 1))) = (1 / 𝑗))
4524mulid1d 10875 . . . . . . . . . . 11 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 · 1) = 𝑗)
4645oveq1d 7247 . . . . . . . . . 10 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → ((𝑗 · 1) / (𝑗 · (𝑗 + 1))) = (𝑗 / (𝑗 · (𝑗 + 1))))
4740, 26, 24, 42, 41divcan5d 11659 . . . . . . . . . 10 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → ((𝑗 · 1) / (𝑗 · (𝑗 + 1))) = (1 / (𝑗 + 1)))
4846, 47eqtr3d 2780 . . . . . . . . 9 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝑗 / (𝑗 · (𝑗 + 1))) = (1 / (𝑗 + 1)))
4944, 48oveq12d 7250 . . . . . . . 8 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (((𝑗 + 1) / (𝑗 · (𝑗 + 1))) − (𝑗 / (𝑗 · (𝑗 + 1)))) = ((1 / 𝑗) − (1 / (𝑗 + 1))))
5032, 36, 493eqtr3d 2786 . . . . . . 7 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (1 / (𝑗 · (𝑗 + 1))) = ((1 / 𝑗) − (1 / (𝑗 + 1))))
5150sumeq2dv 15295 . . . . . 6 ((⊤ ∧ 𝑘 ∈ ℕ) → Σ𝑗 ∈ (1...𝑘)(1 / (𝑗 · (𝑗 + 1))) = Σ𝑗 ∈ (1...𝑘)((1 / 𝑗) − (1 / (𝑗 + 1))))
52 oveq2 7240 . . . . . . 7 (𝑛 = 𝑗 → (1 / 𝑛) = (1 / 𝑗))
53 oveq2 7240 . . . . . . 7 (𝑛 = (𝑗 + 1) → (1 / 𝑛) = (1 / (𝑗 + 1)))
54 oveq2 7240 . . . . . . . 8 (𝑛 = 1 → (1 / 𝑛) = (1 / 1))
55 1div1e1 11547 . . . . . . . 8 (1 / 1) = 1
5654, 55eqtrdi 2795 . . . . . . 7 (𝑛 = 1 → (1 / 𝑛) = 1)
57 oveq2 7240 . . . . . . 7 (𝑛 = (𝑘 + 1) → (1 / 𝑛) = (1 / (𝑘 + 1)))
58 nnz 12224 . . . . . . . 8 (𝑘 ∈ ℕ → 𝑘 ∈ ℤ)
5958adantl 485 . . . . . . 7 ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℤ)
6017, 1eleqtrdi 2849 . . . . . . 7 ((⊤ ∧ 𝑘 ∈ ℕ) → (𝑘 + 1) ∈ (ℤ‘1))
61 elfznn 13166 . . . . . . . . . 10 (𝑛 ∈ (1...(𝑘 + 1)) → 𝑛 ∈ ℕ)
6261adantl 485 . . . . . . . . 9 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑛 ∈ (1...(𝑘 + 1))) → 𝑛 ∈ ℕ)
6362nnrecred 11906 . . . . . . . 8 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑛 ∈ (1...(𝑘 + 1))) → (1 / 𝑛) ∈ ℝ)
6463recnd 10886 . . . . . . 7 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑛 ∈ (1...(𝑘 + 1))) → (1 / 𝑛) ∈ ℂ)
6552, 53, 56, 57, 59, 60, 64telfsum 15396 . . . . . 6 ((⊤ ∧ 𝑘 ∈ ℕ) → Σ𝑗 ∈ (1...𝑘)((1 / 𝑗) − (1 / (𝑗 + 1))) = (1 − (1 / (𝑘 + 1))))
6651, 65eqtrd 2778 . . . . 5 ((⊤ ∧ 𝑘 ∈ ℕ) → Σ𝑗 ∈ (1...𝑘)(1 / (𝑗 · (𝑗 + 1))) = (1 − (1 / (𝑘 + 1))))
67 id 22 . . . . . . . . . 10 (𝑛 = 𝑗𝑛 = 𝑗)
68 oveq1 7239 . . . . . . . . . 10 (𝑛 = 𝑗 → (𝑛 + 1) = (𝑗 + 1))
6967, 68oveq12d 7250 . . . . . . . . 9 (𝑛 = 𝑗 → (𝑛 · (𝑛 + 1)) = (𝑗 · (𝑗 + 1)))
7069oveq2d 7248 . . . . . . . 8 (𝑛 = 𝑗 → (1 / (𝑛 · (𝑛 + 1))) = (1 / (𝑗 · (𝑗 + 1))))
71 trireciplem.1 . . . . . . . 8 𝐹 = (𝑛 ∈ ℕ ↦ (1 / (𝑛 · (𝑛 + 1))))
72 ovex 7265 . . . . . . . 8 (1 / (𝑗 · (𝑗 + 1))) ∈ V
7370, 71, 72fvmpt 6837 . . . . . . 7 (𝑗 ∈ ℕ → (𝐹𝑗) = (1 / (𝑗 · (𝑗 + 1))))
7423, 73syl 17 . . . . . 6 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (𝐹𝑗) = (1 / (𝑗 · (𝑗 + 1))))
75 simpr 488 . . . . . . 7 ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ)
7675, 1eleqtrdi 2849 . . . . . 6 ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ‘1))
7729nnrecred 11906 . . . . . . 7 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (1 / (𝑗 · (𝑗 + 1))) ∈ ℝ)
7877recnd 10886 . . . . . 6 (((⊤ ∧ 𝑘 ∈ ℕ) ∧ 𝑗 ∈ (1...𝑘)) → (1 / (𝑗 · (𝑗 + 1))) ∈ ℂ)
7974, 76, 78fsumser 15322 . . . . 5 ((⊤ ∧ 𝑘 ∈ ℕ) → Σ𝑗 ∈ (1...𝑘)(1 / (𝑗 · (𝑗 + 1))) = (seq1( + , 𝐹)‘𝑘))
8021, 66, 793eqtr2rd 2785 . . . 4 ((⊤ ∧ 𝑘 ∈ ℕ) → (seq1( + , 𝐹)‘𝑘) = (1 − ((𝑛 ∈ ℕ ↦ (1 / (𝑛 + 1)))‘𝑘)))
811, 2, 13, 3, 15, 20, 80climsubc2 15228 . . 3 (⊤ → seq1( + , 𝐹) ⇝ (1 − 0))
8281mptru 1550 . 2 seq1( + , 𝐹) ⇝ (1 − 0)
83 1m0e1 11976 . 2 (1 − 0) = 1
8482, 83breqtri 5093 1 seq1( + , 𝐹) ⇝ 1
Colors of variables: wff setvar class
Syntax hints:  wa 399   = wceq 1543  wtru 1544  wcel 2111  Vcvv 3421   class class class wbr 5068  cmpt 5150  cfv 6398  (class class class)co 7232  cc 10752  0cc0 10754  1c1 10755   + caddc 10757   · cmul 10759  cmin 11087   / cdiv 11514  cn 11855  cz 12201  cuz 12463  ...cfz 13120  seqcseq 13601  cli 15073  Σcsu 15277
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2159  ax-12 2176  ax-ext 2709  ax-rep 5194  ax-sep 5207  ax-nul 5214  ax-pow 5273  ax-pr 5337  ax-un 7542  ax-inf2 9281  ax-cnex 10810  ax-resscn 10811  ax-1cn 10812  ax-icn 10813  ax-addcl 10814  ax-addrcl 10815  ax-mulcl 10816  ax-mulrcl 10817  ax-mulcom 10818  ax-addass 10819  ax-mulass 10820  ax-distr 10821  ax-i2m1 10822  ax-1ne0 10823  ax-1rid 10824  ax-rnegex 10825  ax-rrecex 10826  ax-cnre 10827  ax-pre-lttri 10828  ax-pre-lttrn 10829  ax-pre-ltadd 10830  ax-pre-mulgt0 10831  ax-pre-sup 10832
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 848  df-3or 1090  df-3an 1091  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2072  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2887  df-ne 2942  df-nel 3048  df-ral 3067  df-rex 3068  df-reu 3069  df-rmo 3070  df-rab 3071  df-v 3423  df-sbc 3710  df-csb 3827  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4253  df-if 4455  df-pw 4530  df-sn 4557  df-pr 4559  df-tp 4561  df-op 4563  df-uni 4835  df-int 4875  df-iun 4921  df-br 5069  df-opab 5131  df-mpt 5151  df-tr 5177  df-id 5470  df-eprel 5475  df-po 5483  df-so 5484  df-fr 5524  df-se 5525  df-we 5526  df-xp 5572  df-rel 5573  df-cnv 5574  df-co 5575  df-dm 5576  df-rn 5577  df-res 5578  df-ima 5579  df-pred 6176  df-ord 6234  df-on 6235  df-lim 6236  df-suc 6237  df-iota 6356  df-fun 6400  df-fn 6401  df-f 6402  df-f1 6403  df-fo 6404  df-f1o 6405  df-fv 6406  df-isom 6407  df-riota 7189  df-ov 7235  df-oprab 7236  df-mpo 7237  df-om 7664  df-1st 7780  df-2nd 7781  df-wrecs 8068  df-recs 8129  df-rdg 8167  df-1o 8223  df-er 8412  df-pm 8532  df-en 8648  df-dom 8649  df-sdom 8650  df-fin 8651  df-sup 9083  df-inf 9084  df-oi 9151  df-card 9580  df-pnf 10894  df-mnf 10895  df-xr 10896  df-ltxr 10897  df-le 10898  df-sub 11089  df-neg 11090  df-div 11515  df-nn 11856  df-2 11918  df-3 11919  df-n0 12116  df-z 12202  df-uz 12464  df-rp 12612  df-fz 13121  df-fzo 13264  df-fl 13392  df-seq 13602  df-exp 13663  df-hash 13925  df-shft 14658  df-cj 14690  df-re 14691  df-im 14692  df-sqrt 14826  df-abs 14827  df-clim 15077  df-rlim 15078  df-sum 15278
This theorem is referenced by:  trirecip  15455  stirlinglem12  43332
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