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Theorem serf0 14207
Description: If an infinite series converges, its underlying sequence converges to zero. (Contributed by NM, 2-Sep-2005.) (Revised by Mario Carneiro, 16-Feb-2014.)
Hypotheses
Ref Expression
caucvgb.1 𝑍 = (ℤ𝑀)
serf0.2 (𝜑𝑀 ∈ ℤ)
serf0.3 (𝜑𝐹𝑉)
serf0.4 (𝜑 → seq𝑀( + , 𝐹) ∈ dom ⇝ )
serf0.5 ((𝜑𝑘𝑍) → (𝐹𝑘) ∈ ℂ)
Assertion
Ref Expression
serf0 (𝜑𝐹 ⇝ 0)
Distinct variable groups:   𝑘,𝐹   𝑘,𝑀   𝑘,𝑍   𝜑,𝑘   𝑘,𝑉

Proof of Theorem serf0
Dummy variables 𝑗 𝑚 𝑛 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 serf0.4 . . . . 5 (𝜑 → seq𝑀( + , 𝐹) ∈ dom ⇝ )
2 serf0.2 . . . . . 6 (𝜑𝑀 ∈ ℤ)
3 caucvgb.1 . . . . . . 7 𝑍 = (ℤ𝑀)
43caucvgb 14206 . . . . . 6 ((𝑀 ∈ ℤ ∧ seq𝑀( + , 𝐹) ∈ dom ⇝ ) → (seq𝑀( + , 𝐹) ∈ dom ⇝ ↔ ∀𝑥 ∈ ℝ+𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑗))) < 𝑥)))
52, 1, 4syl2anc 690 . . . . 5 (𝜑 → (seq𝑀( + , 𝐹) ∈ dom ⇝ ↔ ∀𝑥 ∈ ℝ+𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑗))) < 𝑥)))
61, 5mpbid 220 . . . 4 (𝜑 → ∀𝑥 ∈ ℝ+𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑗))) < 𝑥))
73cau3 13891 . . . 4 (∀𝑥 ∈ ℝ+𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑗))) < 𝑥) ↔ ∀𝑥 ∈ ℝ+𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥))
86, 7sylib 206 . . 3 (𝜑 → ∀𝑥 ∈ ℝ+𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥))
93peano2uzs 11576 . . . . . . 7 (𝑗𝑍 → (𝑗 + 1) ∈ 𝑍)
109adantl 480 . . . . . 6 ((𝜑𝑗𝑍) → (𝑗 + 1) ∈ 𝑍)
11 eluzelz 11531 . . . . . . . . . 10 (𝑚 ∈ (ℤ𝑗) → 𝑚 ∈ ℤ)
12 uzid 11536 . . . . . . . . . 10 (𝑚 ∈ ℤ → 𝑚 ∈ (ℤ𝑚))
13 peano2uz 11575 . . . . . . . . . 10 (𝑚 ∈ (ℤ𝑚) → (𝑚 + 1) ∈ (ℤ𝑚))
14 fveq2 6087 . . . . . . . . . . . . . 14 (𝑘 = (𝑚 + 1) → (seq𝑀( + , 𝐹)‘𝑘) = (seq𝑀( + , 𝐹)‘(𝑚 + 1)))
1514oveq2d 6542 . . . . . . . . . . . . 13 (𝑘 = (𝑚 + 1) → ((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘)) = ((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1))))
1615fveq2d 6091 . . . . . . . . . . . 12 (𝑘 = (𝑚 + 1) → (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) = (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))))
1716breq1d 4587 . . . . . . . . . . 11 (𝑘 = (𝑚 + 1) → ((abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥 ↔ (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥))
1817rspcv 3277 . . . . . . . . . 10 ((𝑚 + 1) ∈ (ℤ𝑚) → (∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥 → (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥))
1911, 12, 13, 184syl 19 . . . . . . . . 9 (𝑚 ∈ (ℤ𝑗) → (∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥 → (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥))
2019adantld 481 . . . . . . . 8 (𝑚 ∈ (ℤ𝑗) → (((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥) → (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥))
2120ralimia 2933 . . . . . . 7 (∀𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥) → ∀𝑚 ∈ (ℤ𝑗)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥)
22 simpr 475 . . . . . . . . . . . . 13 ((𝜑𝑗𝑍) → 𝑗𝑍)
2322, 3syl6eleq 2697 . . . . . . . . . . . 12 ((𝜑𝑗𝑍) → 𝑗 ∈ (ℤ𝑀))
24 eluzelz 11531 . . . . . . . . . . . 12 (𝑗 ∈ (ℤ𝑀) → 𝑗 ∈ ℤ)
2523, 24syl 17 . . . . . . . . . . 11 ((𝜑𝑗𝑍) → 𝑗 ∈ ℤ)
26 eluzp1m1 11545 . . . . . . . . . . 11 ((𝑗 ∈ ℤ ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (𝑘 − 1) ∈ (ℤ𝑗))
2725, 26sylan 486 . . . . . . . . . 10 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (𝑘 − 1) ∈ (ℤ𝑗))
28 fveq2 6087 . . . . . . . . . . . . . 14 (𝑚 = (𝑘 − 1) → (seq𝑀( + , 𝐹)‘𝑚) = (seq𝑀( + , 𝐹)‘(𝑘 − 1)))
29 oveq1 6533 . . . . . . . . . . . . . . 15 (𝑚 = (𝑘 − 1) → (𝑚 + 1) = ((𝑘 − 1) + 1))
3029fveq2d 6091 . . . . . . . . . . . . . 14 (𝑚 = (𝑘 − 1) → (seq𝑀( + , 𝐹)‘(𝑚 + 1)) = (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))
3128, 30oveq12d 6544 . . . . . . . . . . . . 13 (𝑚 = (𝑘 − 1) → ((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1))) = ((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1))))
3231fveq2d 6091 . . . . . . . . . . . 12 (𝑚 = (𝑘 − 1) → (abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) = (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))))
3332breq1d 4587 . . . . . . . . . . 11 (𝑚 = (𝑘 − 1) → ((abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥 ↔ (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))) < 𝑥))
3433rspcv 3277 . . . . . . . . . 10 ((𝑘 − 1) ∈ (ℤ𝑗) → (∀𝑚 ∈ (ℤ𝑗)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥 → (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))) < 𝑥))
3527, 34syl 17 . . . . . . . . 9 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (∀𝑚 ∈ (ℤ𝑗)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥 → (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))) < 𝑥))
36 serf0.5 . . . . . . . . . . . . . . 15 ((𝜑𝑘𝑍) → (𝐹𝑘) ∈ ℂ)
373, 2, 36serf 12648 . . . . . . . . . . . . . 14 (𝜑 → seq𝑀( + , 𝐹):𝑍⟶ℂ)
3837ad2antrr 757 . . . . . . . . . . . . 13 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → seq𝑀( + , 𝐹):𝑍⟶ℂ)
393uztrn2 11539 . . . . . . . . . . . . . . 15 ((𝑗𝑍 ∧ (𝑘 − 1) ∈ (ℤ𝑗)) → (𝑘 − 1) ∈ 𝑍)
4022, 39sylan 486 . . . . . . . . . . . . . 14 (((𝜑𝑗𝑍) ∧ (𝑘 − 1) ∈ (ℤ𝑗)) → (𝑘 − 1) ∈ 𝑍)
4127, 40syldan 485 . . . . . . . . . . . . 13 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (𝑘 − 1) ∈ 𝑍)
4238, 41ffvelrnd 6252 . . . . . . . . . . . 12 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (seq𝑀( + , 𝐹)‘(𝑘 − 1)) ∈ ℂ)
433uztrn2 11539 . . . . . . . . . . . . . 14 (((𝑗 + 1) ∈ 𝑍𝑘 ∈ (ℤ‘(𝑗 + 1))) → 𝑘𝑍)
4410, 43sylan 486 . . . . . . . . . . . . 13 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → 𝑘𝑍)
4538, 44ffvelrnd 6252 . . . . . . . . . . . 12 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (seq𝑀( + , 𝐹)‘𝑘) ∈ ℂ)
4642, 45abssubd 13988 . . . . . . . . . . 11 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘𝑘))) = (abs‘((seq𝑀( + , 𝐹)‘𝑘) − (seq𝑀( + , 𝐹)‘(𝑘 − 1)))))
47 eluzelz 11531 . . . . . . . . . . . . . . . . 17 (𝑘 ∈ (ℤ‘(𝑗 + 1)) → 𝑘 ∈ ℤ)
4847adantl 480 . . . . . . . . . . . . . . . 16 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → 𝑘 ∈ ℤ)
4948zcnd 11317 . . . . . . . . . . . . . . 15 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → 𝑘 ∈ ℂ)
50 ax-1cn 9850 . . . . . . . . . . . . . . 15 1 ∈ ℂ
51 npcan 10141 . . . . . . . . . . . . . . 15 ((𝑘 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑘 − 1) + 1) = 𝑘)
5249, 50, 51sylancl 692 . . . . . . . . . . . . . 14 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → ((𝑘 − 1) + 1) = 𝑘)
5352fveq2d 6091 . . . . . . . . . . . . 13 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)) = (seq𝑀( + , 𝐹)‘𝑘))
5453oveq2d 6542 . . . . . . . . . . . 12 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → ((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1))) = ((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘𝑘)))
5554fveq2d 6091 . . . . . . . . . . 11 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))) = (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘𝑘))))
562ad2antrr 757 . . . . . . . . . . . . . . 15 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → 𝑀 ∈ ℤ)
57 eluzp1p1 11547 . . . . . . . . . . . . . . . . 17 (𝑗 ∈ (ℤ𝑀) → (𝑗 + 1) ∈ (ℤ‘(𝑀 + 1)))
5823, 57syl 17 . . . . . . . . . . . . . . . 16 ((𝜑𝑗𝑍) → (𝑗 + 1) ∈ (ℤ‘(𝑀 + 1)))
59 eqid 2609 . . . . . . . . . . . . . . . . 17 (ℤ‘(𝑀 + 1)) = (ℤ‘(𝑀 + 1))
6059uztrn2 11539 . . . . . . . . . . . . . . . 16 (((𝑗 + 1) ∈ (ℤ‘(𝑀 + 1)) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → 𝑘 ∈ (ℤ‘(𝑀 + 1)))
6158, 60sylan 486 . . . . . . . . . . . . . . 15 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → 𝑘 ∈ (ℤ‘(𝑀 + 1)))
62 seqm1 12637 . . . . . . . . . . . . . . 15 ((𝑀 ∈ ℤ ∧ 𝑘 ∈ (ℤ‘(𝑀 + 1))) → (seq𝑀( + , 𝐹)‘𝑘) = ((seq𝑀( + , 𝐹)‘(𝑘 − 1)) + (𝐹𝑘)))
6356, 61, 62syl2anc 690 . . . . . . . . . . . . . 14 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (seq𝑀( + , 𝐹)‘𝑘) = ((seq𝑀( + , 𝐹)‘(𝑘 − 1)) + (𝐹𝑘)))
6463oveq1d 6541 . . . . . . . . . . . . 13 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → ((seq𝑀( + , 𝐹)‘𝑘) − (seq𝑀( + , 𝐹)‘(𝑘 − 1))) = (((seq𝑀( + , 𝐹)‘(𝑘 − 1)) + (𝐹𝑘)) − (seq𝑀( + , 𝐹)‘(𝑘 − 1))))
6536adantlr 746 . . . . . . . . . . . . . . 15 (((𝜑𝑗𝑍) ∧ 𝑘𝑍) → (𝐹𝑘) ∈ ℂ)
6644, 65syldan 485 . . . . . . . . . . . . . 14 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (𝐹𝑘) ∈ ℂ)
6742, 66pncan2d 10245 . . . . . . . . . . . . 13 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (((seq𝑀( + , 𝐹)‘(𝑘 − 1)) + (𝐹𝑘)) − (seq𝑀( + , 𝐹)‘(𝑘 − 1))) = (𝐹𝑘))
6864, 67eqtr2d 2644 . . . . . . . . . . . 12 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (𝐹𝑘) = ((seq𝑀( + , 𝐹)‘𝑘) − (seq𝑀( + , 𝐹)‘(𝑘 − 1))))
6968fveq2d 6091 . . . . . . . . . . 11 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (abs‘(𝐹𝑘)) = (abs‘((seq𝑀( + , 𝐹)‘𝑘) − (seq𝑀( + , 𝐹)‘(𝑘 − 1)))))
7046, 55, 693eqtr4d 2653 . . . . . . . . . 10 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))) = (abs‘(𝐹𝑘)))
7170breq1d 4587 . . . . . . . . 9 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → ((abs‘((seq𝑀( + , 𝐹)‘(𝑘 − 1)) − (seq𝑀( + , 𝐹)‘((𝑘 − 1) + 1)))) < 𝑥 ↔ (abs‘(𝐹𝑘)) < 𝑥))
7235, 71sylibd 227 . . . . . . . 8 (((𝜑𝑗𝑍) ∧ 𝑘 ∈ (ℤ‘(𝑗 + 1))) → (∀𝑚 ∈ (ℤ𝑗)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥 → (abs‘(𝐹𝑘)) < 𝑥))
7372ralrimdva 2951 . . . . . . 7 ((𝜑𝑗𝑍) → (∀𝑚 ∈ (ℤ𝑗)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘(𝑚 + 1)))) < 𝑥 → ∀𝑘 ∈ (ℤ‘(𝑗 + 1))(abs‘(𝐹𝑘)) < 𝑥))
7421, 73syl5 33 . . . . . 6 ((𝜑𝑗𝑍) → (∀𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥) → ∀𝑘 ∈ (ℤ‘(𝑗 + 1))(abs‘(𝐹𝑘)) < 𝑥))
75 fveq2 6087 . . . . . . . 8 (𝑛 = (𝑗 + 1) → (ℤ𝑛) = (ℤ‘(𝑗 + 1)))
7675raleqdv 3120 . . . . . . 7 (𝑛 = (𝑗 + 1) → (∀𝑘 ∈ (ℤ𝑛)(abs‘(𝐹𝑘)) < 𝑥 ↔ ∀𝑘 ∈ (ℤ‘(𝑗 + 1))(abs‘(𝐹𝑘)) < 𝑥))
7776rspcev 3281 . . . . . 6 (((𝑗 + 1) ∈ 𝑍 ∧ ∀𝑘 ∈ (ℤ‘(𝑗 + 1))(abs‘(𝐹𝑘)) < 𝑥) → ∃𝑛𝑍𝑘 ∈ (ℤ𝑛)(abs‘(𝐹𝑘)) < 𝑥)
7810, 74, 77syl6an 565 . . . . 5 ((𝜑𝑗𝑍) → (∀𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥) → ∃𝑛𝑍𝑘 ∈ (ℤ𝑛)(abs‘(𝐹𝑘)) < 𝑥))
7978rexlimdva 3012 . . . 4 (𝜑 → (∃𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥) → ∃𝑛𝑍𝑘 ∈ (ℤ𝑛)(abs‘(𝐹𝑘)) < 𝑥))
8079ralimdv 2945 . . 3 (𝜑 → (∀𝑥 ∈ ℝ+𝑗𝑍𝑚 ∈ (ℤ𝑗)((seq𝑀( + , 𝐹)‘𝑚) ∈ ℂ ∧ ∀𝑘 ∈ (ℤ𝑚)(abs‘((seq𝑀( + , 𝐹)‘𝑚) − (seq𝑀( + , 𝐹)‘𝑘))) < 𝑥) → ∀𝑥 ∈ ℝ+𝑛𝑍𝑘 ∈ (ℤ𝑛)(abs‘(𝐹𝑘)) < 𝑥))
818, 80mpd 15 . 2 (𝜑 → ∀𝑥 ∈ ℝ+𝑛𝑍𝑘 ∈ (ℤ𝑛)(abs‘(𝐹𝑘)) < 𝑥)
82 serf0.3 . . 3 (𝜑𝐹𝑉)
83 eqidd 2610 . . 3 ((𝜑𝑘𝑍) → (𝐹𝑘) = (𝐹𝑘))
843, 2, 82, 83, 36clim0c 14034 . 2 (𝜑 → (𝐹 ⇝ 0 ↔ ∀𝑥 ∈ ℝ+𝑛𝑍𝑘 ∈ (ℤ𝑛)(abs‘(𝐹𝑘)) < 𝑥))
8581, 84mpbird 245 1 (𝜑𝐹 ⇝ 0)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 194  wa 382   = wceq 1474  wcel 1976  wral 2895  wrex 2896   class class class wbr 4577  dom cdm 5027  wf 5785  cfv 5789  (class class class)co 6526  cc 9790  0cc0 9792  1c1 9793   + caddc 9795   < clt 9930  cmin 10117  cz 11212  cuz 11521  +crp 11666  seqcseq 12620  abscabs 13770  cli 14011
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1712  ax-4 1727  ax-5 1826  ax-6 1874  ax-7 1921  ax-8 1978  ax-9 1985  ax-10 2005  ax-11 2020  ax-12 2033  ax-13 2233  ax-ext 2589  ax-rep 4693  ax-sep 4703  ax-nul 4711  ax-pow 4763  ax-pr 4827  ax-un 6824  ax-cnex 9848  ax-resscn 9849  ax-1cn 9850  ax-icn 9851  ax-addcl 9852  ax-addrcl 9853  ax-mulcl 9854  ax-mulrcl 9855  ax-mulcom 9856  ax-addass 9857  ax-mulass 9858  ax-distr 9859  ax-i2m1 9860  ax-1ne0 9861  ax-1rid 9862  ax-rnegex 9863  ax-rrecex 9864  ax-cnre 9865  ax-pre-lttri 9866  ax-pre-lttrn 9867  ax-pre-ltadd 9868  ax-pre-mulgt0 9869  ax-pre-sup 9870  ax-addf 9871  ax-mulf 9872
This theorem depends on definitions:  df-bi 195  df-or 383  df-an 384  df-3or 1031  df-3an 1032  df-tru 1477  df-ex 1695  df-nf 1700  df-sb 1867  df-eu 2461  df-mo 2462  df-clab 2596  df-cleq 2602  df-clel 2605  df-nfc 2739  df-ne 2781  df-nel 2782  df-ral 2900  df-rex 2901  df-reu 2902  df-rmo 2903  df-rab 2904  df-v 3174  df-sbc 3402  df-csb 3499  df-dif 3542  df-un 3544  df-in 3546  df-ss 3553  df-pss 3555  df-nul 3874  df-if 4036  df-pw 4109  df-sn 4125  df-pr 4127  df-tp 4129  df-op 4131  df-uni 4367  df-iun 4451  df-br 4578  df-opab 4638  df-mpt 4639  df-tr 4675  df-eprel 4938  df-id 4942  df-po 4948  df-so 4949  df-fr 4986  df-we 4988  df-xp 5033  df-rel 5034  df-cnv 5035  df-co 5036  df-dm 5037  df-rn 5038  df-res 5039  df-ima 5040  df-pred 5582  df-ord 5628  df-on 5629  df-lim 5630  df-suc 5631  df-iota 5753  df-fun 5791  df-fn 5792  df-f 5793  df-f1 5794  df-fo 5795  df-f1o 5796  df-fv 5797  df-riota 6488  df-ov 6529  df-oprab 6530  df-mpt2 6531  df-om 6935  df-1st 7036  df-2nd 7037  df-wrecs 7271  df-recs 7332  df-rdg 7370  df-er 7606  df-pm 7724  df-en 7819  df-dom 7820  df-sdom 7821  df-sup 8208  df-inf 8209  df-pnf 9932  df-mnf 9933  df-xr 9934  df-ltxr 9935  df-le 9936  df-sub 10119  df-neg 10120  df-div 10536  df-nn 10870  df-2 10928  df-3 10929  df-n0 11142  df-z 11213  df-uz 11522  df-rp 11667  df-ico 12010  df-fz 12155  df-fl 12412  df-seq 12621  df-exp 12680  df-cj 13635  df-re 13636  df-im 13637  df-sqrt 13771  df-abs 13772  df-limsup 13998  df-clim 14015  df-rlim 14016
This theorem is referenced by:  mertenslem2  14404  radcnvlem1  23915  dvgrat  37316  expfac  38507
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