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Theorem clim2d 45657
Description: The limit of complex number sequence 𝐹 is eventually approximated. (Contributed by Glauco Siliprandi, 26-Jun-2021.)
Hypotheses
Ref Expression
clim2d.k 𝑘𝜑
clim2d.f 𝑘𝐹
clim2d.m (𝜑𝑀 ∈ ℤ)
clim2d.z 𝑍 = (ℤ𝑀)
clim2d.c (𝜑𝐹𝐴)
clim2d.b ((𝜑𝑘𝑍) → (𝐹𝑘) = 𝐵)
clim2d.x (𝜑𝑋 ∈ ℝ+)
Assertion
Ref Expression
clim2d (𝜑 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑋))
Distinct variable groups:   𝐴,𝑗,𝑘   𝑗,𝐹   𝑗,𝑀   𝑗,𝑋,𝑘   𝑗,𝑍,𝑘   𝜑,𝑗
Allowed substitution hints:   𝜑(𝑘)   𝐵(𝑗,𝑘)   𝐹(𝑘)   𝑀(𝑘)

Proof of Theorem clim2d
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 clim2d.x . 2 (𝜑𝑋 ∈ ℝ+)
2 clim2d.c . . . 4 (𝜑𝐹𝐴)
3 clim2d.k . . . . 5 𝑘𝜑
4 clim2d.f . . . . 5 𝑘𝐹
5 clim2d.z . . . . 5 𝑍 = (ℤ𝑀)
6 clim2d.m . . . . 5 (𝜑𝑀 ∈ ℤ)
7 climrel 15534 . . . . . . 7 Rel ⇝
87a1i 11 . . . . . 6 (𝜑 → Rel ⇝ )
9 brrelex1 5746 . . . . . 6 ((Rel ⇝ ∧ 𝐹𝐴) → 𝐹 ∈ V)
108, 2, 9syl2anc 584 . . . . 5 (𝜑𝐹 ∈ V)
11 clim2d.b . . . . 5 ((𝜑𝑘𝑍) → (𝐹𝑘) = 𝐵)
123, 4, 5, 6, 10, 11clim2f2 45654 . . . 4 (𝜑 → (𝐹𝐴 ↔ (𝐴 ∈ ℂ ∧ ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥))))
132, 12mpbid 232 . . 3 (𝜑 → (𝐴 ∈ ℂ ∧ ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥)))
1413simprd 495 . 2 (𝜑 → ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥))
15 breq2 5155 . . . . . 6 (𝑥 = 𝑋 → ((abs‘(𝐵𝐴)) < 𝑥 ↔ (abs‘(𝐵𝐴)) < 𝑋))
1615anbi2d 630 . . . . 5 (𝑥 = 𝑋 → ((𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥) ↔ (𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑋)))
1716ralbidv 3178 . . . 4 (𝑥 = 𝑋 → (∀𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥) ↔ ∀𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑋)))
1817rexbidv 3179 . . 3 (𝑥 = 𝑋 → (∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥) ↔ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑋)))
1918rspcva 3623 . 2 ((𝑋 ∈ ℝ+ ∧ ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥)) → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑋))
201, 14, 19syl2anc 584 1 (𝜑 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑋))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1539  wnf 1782  wcel 2108  wnfc 2890  wral 3061  wrex 3070  Vcvv 3481   class class class wbr 5151  Rel wrel 5698  cfv 6569  (class class class)co 7438  cc 11160   < clt 11302  cmin 11499  cz 12620  cuz 12885  +crp 13041  abscabs 15279  cli 15526
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-sep 5305  ax-nul 5315  ax-pow 5374  ax-pr 5441  ax-un 7761  ax-cnex 11218  ax-resscn 11219  ax-pre-lttri 11236  ax-pre-lttrn 11237
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1542  df-fal 1552  df-ex 1779  df-nf 1783  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-nel 3047  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3483  df-sbc 3795  df-csb 3912  df-dif 3969  df-un 3971  df-in 3973  df-ss 3983  df-nul 4343  df-if 4535  df-pw 4610  df-sn 4635  df-pr 4637  df-op 4641  df-uni 4916  df-br 5152  df-opab 5214  df-mpt 5235  df-id 5587  df-po 5601  df-so 5602  df-xp 5699  df-rel 5700  df-cnv 5701  df-co 5702  df-dm 5703  df-rn 5704  df-res 5705  df-ima 5706  df-iota 6522  df-fun 6571  df-fn 6572  df-f 6573  df-f1 6574  df-fo 6575  df-f1o 6576  df-fv 6577  df-ov 7441  df-er 8753  df-en 8994  df-dom 8995  df-sdom 8996  df-pnf 11304  df-mnf 11305  df-xr 11306  df-ltxr 11307  df-le 11308  df-neg 11502  df-z 12621  df-uz 12886  df-clim 15530
This theorem is referenced by:  climleltrp  45660
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