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Theorem caubnd 14142
Description: A Cauchy sequence of complex numbers is bounded. (Contributed by NM, 4-Apr-2005.) (Revised by Mario Carneiro, 14-Feb-2014.)
Hypothesis
Ref Expression
cau3.1 𝑍 = (ℤ𝑀)
Assertion
Ref Expression
caubnd ((∀𝑘𝑍 (𝐹𝑘) ∈ ℂ ∧ ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)
Distinct variable groups:   𝑗,𝑘,𝑥,𝑦,𝐹   𝑗,𝑀,𝑘,𝑥   𝑗,𝑍,𝑘,𝑥,𝑦
Allowed substitution hint:   𝑀(𝑦)

Proof of Theorem caubnd
Dummy variables 𝑤 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 abscl 14062 . . . 4 ((𝐹𝑘) ∈ ℂ → (abs‘(𝐹𝑘)) ∈ ℝ)
21ralimi 2981 . . 3 (∀𝑘𝑍 (𝐹𝑘) ∈ ℂ → ∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ)
3 cau3.1 . . . . . . 7 𝑍 = (ℤ𝑀)
43r19.29uz 14134 . . . . . 6 ((∀𝑘𝑍 (𝐹𝑘) ∈ ℂ ∧ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥) → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)((𝐹𝑘) ∈ ℂ ∧ (abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥))
54ex 449 . . . . 5 (∀𝑘𝑍 (𝐹𝑘) ∈ ℂ → (∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)((𝐹𝑘) ∈ ℂ ∧ (abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥)))
65ralimdv 2992 . . . 4 (∀𝑘𝑍 (𝐹𝑘) ∈ ℂ → (∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥 → ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)((𝐹𝑘) ∈ ℂ ∧ (abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥)))
73caubnd2 14141 . . . 4 (∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)((𝐹𝑘) ∈ ℂ ∧ (abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥) → ∃𝑧 ∈ ℝ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧)
86, 7syl6 35 . . 3 (∀𝑘𝑍 (𝐹𝑘) ∈ ℂ → (∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥 → ∃𝑧 ∈ ℝ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧))
9 fzssuz 12420 . . . . . . . 8 (𝑀...𝑗) ⊆ (ℤ𝑀)
109, 3sseqtr4i 3671 . . . . . . 7 (𝑀...𝑗) ⊆ 𝑍
11 ssralv 3699 . . . . . . 7 ((𝑀...𝑗) ⊆ 𝑍 → (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ))
1210, 11ax-mp 5 . . . . . 6 (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ)
13 fzfi 12811 . . . . . . . 8 (𝑀...𝑗) ∈ Fin
14 fimaxre3 11008 . . . . . . . 8 (((𝑀...𝑗) ∈ Fin ∧ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ) → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ≤ 𝑥)
1513, 14mpan 706 . . . . . . 7 (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ≤ 𝑥)
16 peano2re 10247 . . . . . . . . . 10 (𝑥 ∈ ℝ → (𝑥 + 1) ∈ ℝ)
1716adantl 481 . . . . . . . . 9 ((∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → (𝑥 + 1) ∈ ℝ)
18 ltp1 10899 . . . . . . . . . . . . . . 15 (𝑥 ∈ ℝ → 𝑥 < (𝑥 + 1))
1918adantl 481 . . . . . . . . . . . . . 14 (((abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → 𝑥 < (𝑥 + 1))
2016adantl 481 . . . . . . . . . . . . . . 15 (((abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → (𝑥 + 1) ∈ ℝ)
21 lelttr 10166 . . . . . . . . . . . . . . 15 (((abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ ∧ (𝑥 + 1) ∈ ℝ) → (((abs‘(𝐹𝑘)) ≤ 𝑥𝑥 < (𝑥 + 1)) → (abs‘(𝐹𝑘)) < (𝑥 + 1)))
2220, 21mpd3an3 1465 . . . . . . . . . . . . . 14 (((abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → (((abs‘(𝐹𝑘)) ≤ 𝑥𝑥 < (𝑥 + 1)) → (abs‘(𝐹𝑘)) < (𝑥 + 1)))
2319, 22mpan2d 710 . . . . . . . . . . . . 13 (((abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → ((abs‘(𝐹𝑘)) ≤ 𝑥 → (abs‘(𝐹𝑘)) < (𝑥 + 1)))
2423expcom 450 . . . . . . . . . . . 12 (𝑥 ∈ ℝ → ((abs‘(𝐹𝑘)) ∈ ℝ → ((abs‘(𝐹𝑘)) ≤ 𝑥 → (abs‘(𝐹𝑘)) < (𝑥 + 1))))
2524ralimdv 2992 . . . . . . . . . . 11 (𝑥 ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ → ∀𝑘 ∈ (𝑀...𝑗)((abs‘(𝐹𝑘)) ≤ 𝑥 → (abs‘(𝐹𝑘)) < (𝑥 + 1))))
2625impcom 445 . . . . . . . . . 10 ((∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → ∀𝑘 ∈ (𝑀...𝑗)((abs‘(𝐹𝑘)) ≤ 𝑥 → (abs‘(𝐹𝑘)) < (𝑥 + 1)))
27 ralim 2977 . . . . . . . . . 10 (∀𝑘 ∈ (𝑀...𝑗)((abs‘(𝐹𝑘)) ≤ 𝑥 → (abs‘(𝐹𝑘)) < (𝑥 + 1)) → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ≤ 𝑥 → ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < (𝑥 + 1)))
2826, 27syl 17 . . . . . . . . 9 ((∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ≤ 𝑥 → ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < (𝑥 + 1)))
29 breq2 4689 . . . . . . . . . . 11 (𝑤 = (𝑥 + 1) → ((abs‘(𝐹𝑘)) < 𝑤 ↔ (abs‘(𝐹𝑘)) < (𝑥 + 1)))
3029ralbidv 3015 . . . . . . . . . 10 (𝑤 = (𝑥 + 1) → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 ↔ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < (𝑥 + 1)))
3130rspcev 3340 . . . . . . . . 9 (((𝑥 + 1) ∈ ℝ ∧ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < (𝑥 + 1)) → ∃𝑤 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤)
3217, 28, 31syl6an 567 . . . . . . . 8 ((∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑥 ∈ ℝ) → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ≤ 𝑥 → ∃𝑤 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤))
3332rexlimdva 3060 . . . . . . 7 (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ → (∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ≤ 𝑥 → ∃𝑤 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤))
3415, 33mpd 15 . . . . . 6 (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) ∈ ℝ → ∃𝑤 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤)
3512, 34syl 17 . . . . 5 (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → ∃𝑤 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤)
36 max1 12054 . . . . . . . . . . . . . . . . . 18 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → 𝑤 ≤ if(𝑤𝑧, 𝑧, 𝑤))
37363adant3 1101 . . . . . . . . . . . . . . . . 17 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → 𝑤 ≤ if(𝑤𝑧, 𝑧, 𝑤))
38 simp3 1083 . . . . . . . . . . . . . . . . . 18 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → (abs‘(𝐹𝑘)) ∈ ℝ)
39 simp1 1081 . . . . . . . . . . . . . . . . . 18 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → 𝑤 ∈ ℝ)
40 ifcl 4163 . . . . . . . . . . . . . . . . . . . 20 ((𝑧 ∈ ℝ ∧ 𝑤 ∈ ℝ) → if(𝑤𝑧, 𝑧, 𝑤) ∈ ℝ)
4140ancoms 468 . . . . . . . . . . . . . . . . . . 19 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → if(𝑤𝑧, 𝑧, 𝑤) ∈ ℝ)
42413adant3 1101 . . . . . . . . . . . . . . . . . 18 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → if(𝑤𝑧, 𝑧, 𝑤) ∈ ℝ)
43 ltletr 10167 . . . . . . . . . . . . . . . . . 18 (((abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑤 ∈ ℝ ∧ if(𝑤𝑧, 𝑧, 𝑤) ∈ ℝ) → (((abs‘(𝐹𝑘)) < 𝑤𝑤 ≤ if(𝑤𝑧, 𝑧, 𝑤)) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
4438, 39, 42, 43syl3anc 1366 . . . . . . . . . . . . . . . . 17 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → (((abs‘(𝐹𝑘)) < 𝑤𝑤 ≤ if(𝑤𝑧, 𝑧, 𝑤)) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
4537, 44mpan2d 710 . . . . . . . . . . . . . . . 16 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → ((abs‘(𝐹𝑘)) < 𝑤 → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
46 max2 12056 . . . . . . . . . . . . . . . . . 18 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → 𝑧 ≤ if(𝑤𝑧, 𝑧, 𝑤))
47463adant3 1101 . . . . . . . . . . . . . . . . 17 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → 𝑧 ≤ if(𝑤𝑧, 𝑧, 𝑤))
48 simp2 1082 . . . . . . . . . . . . . . . . . 18 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → 𝑧 ∈ ℝ)
49 ltletr 10167 . . . . . . . . . . . . . . . . . 18 (((abs‘(𝐹𝑘)) ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ if(𝑤𝑧, 𝑧, 𝑤) ∈ ℝ) → (((abs‘(𝐹𝑘)) < 𝑧𝑧 ≤ if(𝑤𝑧, 𝑧, 𝑤)) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
5038, 48, 42, 49syl3anc 1366 . . . . . . . . . . . . . . . . 17 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → (((abs‘(𝐹𝑘)) < 𝑧𝑧 ≤ if(𝑤𝑧, 𝑧, 𝑤)) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
5147, 50mpan2d 710 . . . . . . . . . . . . . . . 16 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → ((abs‘(𝐹𝑘)) < 𝑧 → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
5245, 51jaod 394 . . . . . . . . . . . . . . 15 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ (abs‘(𝐹𝑘)) ∈ ℝ) → (((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
53523expia 1286 . . . . . . . . . . . . . 14 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → ((abs‘(𝐹𝑘)) ∈ ℝ → (((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤))))
5453ralimdv 2992 . . . . . . . . . . . . 13 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → ∀𝑘𝑍 (((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤))))
55 ralim 2977 . . . . . . . . . . . . 13 (∀𝑘𝑍 (((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)) → (∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → ∀𝑘𝑍 (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
5654, 55syl6 35 . . . . . . . . . . . 12 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → ∀𝑘𝑍 (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤))))
57 breq2 4689 . . . . . . . . . . . . . . . 16 (𝑦 = if(𝑤𝑧, 𝑧, 𝑤) → ((abs‘(𝐹𝑘)) < 𝑦 ↔ (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
5857ralbidv 3015 . . . . . . . . . . . . . . 15 (𝑦 = if(𝑤𝑧, 𝑧, 𝑤) → (∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦 ↔ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)))
5958rspcev 3340 . . . . . . . . . . . . . 14 ((if(𝑤𝑧, 𝑧, 𝑤) ∈ ℝ ∧ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤)) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)
6059ex 449 . . . . . . . . . . . . 13 (if(𝑤𝑧, 𝑧, 𝑤) ∈ ℝ → (∀𝑘𝑍 (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦))
6141, 60syl 17 . . . . . . . . . . . 12 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (∀𝑘𝑍 (abs‘(𝐹𝑘)) < if(𝑤𝑧, 𝑧, 𝑤) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦))
6256, 61syl6d 75 . . . . . . . . . . 11 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)))
63 uzssz 11745 . . . . . . . . . . . . . . . . . . . . . 22 (ℤ𝑀) ⊆ ℤ
643, 63eqsstri 3668 . . . . . . . . . . . . . . . . . . . . 21 𝑍 ⊆ ℤ
6564sseli 3632 . . . . . . . . . . . . . . . . . . . 20 (𝑘𝑍𝑘 ∈ ℤ)
6664sseli 3632 . . . . . . . . . . . . . . . . . . . 20 (𝑗𝑍𝑗 ∈ ℤ)
67 uztric 11747 . . . . . . . . . . . . . . . . . . . 20 ((𝑘 ∈ ℤ ∧ 𝑗 ∈ ℤ) → (𝑗 ∈ (ℤ𝑘) ∨ 𝑘 ∈ (ℤ𝑗)))
6865, 66, 67syl2anr 494 . . . . . . . . . . . . . . . . . . 19 ((𝑗𝑍𝑘𝑍) → (𝑗 ∈ (ℤ𝑘) ∨ 𝑘 ∈ (ℤ𝑗)))
69 simpr 476 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑗𝑍𝑘𝑍) → 𝑘𝑍)
7069, 3syl6eleq 2740 . . . . . . . . . . . . . . . . . . . . 21 ((𝑗𝑍𝑘𝑍) → 𝑘 ∈ (ℤ𝑀))
71 elfzuzb 12374 . . . . . . . . . . . . . . . . . . . . . 22 (𝑘 ∈ (𝑀...𝑗) ↔ (𝑘 ∈ (ℤ𝑀) ∧ 𝑗 ∈ (ℤ𝑘)))
7271baib 964 . . . . . . . . . . . . . . . . . . . . 21 (𝑘 ∈ (ℤ𝑀) → (𝑘 ∈ (𝑀...𝑗) ↔ 𝑗 ∈ (ℤ𝑘)))
7370, 72syl 17 . . . . . . . . . . . . . . . . . . . 20 ((𝑗𝑍𝑘𝑍) → (𝑘 ∈ (𝑀...𝑗) ↔ 𝑗 ∈ (ℤ𝑘)))
7473orbi1d 739 . . . . . . . . . . . . . . . . . . 19 ((𝑗𝑍𝑘𝑍) → ((𝑘 ∈ (𝑀...𝑗) ∨ 𝑘 ∈ (ℤ𝑗)) ↔ (𝑗 ∈ (ℤ𝑘) ∨ 𝑘 ∈ (ℤ𝑗))))
7568, 74mpbird 247 . . . . . . . . . . . . . . . . . 18 ((𝑗𝑍𝑘𝑍) → (𝑘 ∈ (𝑀...𝑗) ∨ 𝑘 ∈ (ℤ𝑗)))
7675ex 449 . . . . . . . . . . . . . . . . 17 (𝑗𝑍 → (𝑘𝑍 → (𝑘 ∈ (𝑀...𝑗) ∨ 𝑘 ∈ (ℤ𝑗))))
77 pm3.48 896 . . . . . . . . . . . . . . . . 17 (((𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤) ∧ (𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧)) → ((𝑘 ∈ (𝑀...𝑗) ∨ 𝑘 ∈ (ℤ𝑗)) → ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧)))
7876, 77syl9 77 . . . . . . . . . . . . . . . 16 (𝑗𝑍 → (((𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤) ∧ (𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧)) → (𝑘𝑍 → ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧))))
7978alimdv 1885 . . . . . . . . . . . . . . 15 (𝑗𝑍 → (∀𝑘((𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤) ∧ (𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧)) → ∀𝑘(𝑘𝑍 → ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧))))
80 df-ral 2946 . . . . . . . . . . . . . . . . 17 (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 ↔ ∀𝑘(𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤))
81 df-ral 2946 . . . . . . . . . . . . . . . . 17 (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 ↔ ∀𝑘(𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧))
8280, 81anbi12i 733 . . . . . . . . . . . . . . . 16 ((∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 ∧ ∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧) ↔ (∀𝑘(𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤) ∧ ∀𝑘(𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧)))
83 19.26 1838 . . . . . . . . . . . . . . . 16 (∀𝑘((𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤) ∧ (𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧)) ↔ (∀𝑘(𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤) ∧ ∀𝑘(𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧)))
8482, 83bitr4i 267 . . . . . . . . . . . . . . 15 ((∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 ∧ ∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧) ↔ ∀𝑘((𝑘 ∈ (𝑀...𝑗) → (abs‘(𝐹𝑘)) < 𝑤) ∧ (𝑘 ∈ (ℤ𝑗) → (abs‘(𝐹𝑘)) < 𝑧)))
85 df-ral 2946 . . . . . . . . . . . . . . 15 (∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) ↔ ∀𝑘(𝑘𝑍 → ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧)))
8679, 84, 853imtr4g 285 . . . . . . . . . . . . . 14 (𝑗𝑍 → ((∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 ∧ ∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧) → ∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧)))
87863impib 1281 . . . . . . . . . . . . 13 ((𝑗𝑍 ∧ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 ∧ ∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧) → ∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧))
8887imim1i 63 . . . . . . . . . . . 12 ((∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦) → ((𝑗𝑍 ∧ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 ∧ ∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦))
89883expd 1306 . . . . . . . . . . 11 ((∀𝑘𝑍 ((abs‘(𝐹𝑘)) < 𝑤 ∨ (abs‘(𝐹𝑘)) < 𝑧) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦) → (𝑗𝑍 → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦))))
9062, 89syl6 35 . . . . . . . . . 10 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (𝑗𝑍 → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)))))
9190com23 86 . . . . . . . . 9 ((𝑤 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (𝑗𝑍 → (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)))))
9291expimpd 628 . . . . . . . 8 (𝑤 ∈ ℝ → ((𝑧 ∈ ℝ ∧ 𝑗𝑍) → (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)))))
9392com3r 87 . . . . . . 7 (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (𝑤 ∈ ℝ → ((𝑧 ∈ ℝ ∧ 𝑗𝑍) → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)))))
9493com34 91 . . . . . 6 (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (𝑤 ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 → ((𝑧 ∈ ℝ ∧ 𝑗𝑍) → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)))))
9594rexlimdv 3059 . . . . 5 (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (∃𝑤 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑗)(abs‘(𝐹𝑘)) < 𝑤 → ((𝑧 ∈ ℝ ∧ 𝑗𝑍) → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦))))
9635, 95mpd 15 . . . 4 (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → ((𝑧 ∈ ℝ ∧ 𝑗𝑍) → (∀𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)))
9796rexlimdvv 3066 . . 3 (∀𝑘𝑍 (abs‘(𝐹𝑘)) ∈ ℝ → (∃𝑧 ∈ ℝ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘(𝐹𝑘)) < 𝑧 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦))
982, 8, 97sylsyld 61 . 2 (∀𝑘𝑍 (𝐹𝑘) ∈ ℂ → (∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥 → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦))
9998imp 444 1 ((∀𝑘𝑍 (𝐹𝑘) ∈ ℂ ∧ ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(abs‘((𝐹𝑘) − (𝐹𝑗))) < 𝑥) → ∃𝑦 ∈ ℝ ∀𝑘𝑍 (abs‘(𝐹𝑘)) < 𝑦)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wo 382  wa 383  w3a 1054  wal 1521   = wceq 1523  wcel 2030  wral 2941  wrex 2942  wss 3607  ifcif 4119   class class class wbr 4685  cfv 5926  (class class class)co 6690  Fincfn 7997  cc 9972  cr 9973  1c1 9975   + caddc 9977   < clt 10112  cle 10113  cmin 10304  cz 11415  cuz 11725  +crp 11870  ...cfz 12364  abscabs 14018
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051  ax-pre-sup 10052
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-oadd 7609  df-er 7787  df-en 7998  df-dom 7999  df-sdom 8000  df-fin 8001  df-sup 8389  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-div 10723  df-nn 11059  df-2 11117  df-3 11118  df-n0 11331  df-z 11416  df-uz 11726  df-rp 11871  df-fz 12365  df-seq 12842  df-exp 12901  df-cj 13883  df-re 13884  df-im 13885  df-sqrt 14019  df-abs 14020
This theorem is referenced by:  climbdd  14446
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