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Theorem climi 15409
Description: Convergence of a sequence of complex numbers. (Contributed by NM, 11-Jan-2007.) (Revised by Mario Carneiro, 31-Jan-2014.)
Hypotheses
Ref Expression
climi.1 𝑍 = (ℤ𝑀)
climi.2 (𝜑𝑀 ∈ ℤ)
climi.3 (𝜑𝐶 ∈ ℝ+)
climi.4 ((𝜑𝑘𝑍) → (𝐹𝑘) = 𝐵)
climi.5 (𝜑𝐹𝐴)
Assertion
Ref Expression
climi (𝜑 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝐶))
Distinct variable groups:   𝑗,𝑘,𝐴   𝐶,𝑗,𝑘   𝑗,𝐹,𝑘   𝜑,𝑗,𝑘   𝑗,𝑍,𝑘   𝑗,𝑀
Allowed substitution hints:   𝐵(𝑗,𝑘)   𝑀(𝑘)

Proof of Theorem climi
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 breq2 5093 . . . 4 (𝑥 = 𝐶 → ((abs‘(𝐵𝐴)) < 𝑥 ↔ (abs‘(𝐵𝐴)) < 𝐶))
21anbi2d 630 . . 3 (𝑥 = 𝐶 → ((𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥) ↔ (𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝐶)))
32rexralbidv 3196 . 2 (𝑥 = 𝐶 → (∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥) ↔ ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝐶)))
4 climi.5 . . . 4 (𝜑𝐹𝐴)
5 climi.1 . . . . 5 𝑍 = (ℤ𝑀)
6 climi.2 . . . . 5 (𝜑𝑀 ∈ ℤ)
7 climrel 15391 . . . . . . 7 Rel ⇝
87brrelex1i 5670 . . . . . 6 (𝐹𝐴𝐹 ∈ V)
94, 8syl 17 . . . . 5 (𝜑𝐹 ∈ V)
10 climi.4 . . . . 5 ((𝜑𝑘𝑍) → (𝐹𝑘) = 𝐵)
115, 6, 9, 10clim2 15403 . . . 4 (𝜑 → (𝐹𝐴 ↔ (𝐴 ∈ ℂ ∧ ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥))))
124, 11mpbid 232 . . 3 (𝜑 → (𝐴 ∈ ℂ ∧ ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥)))
1312simprd 495 . 2 (𝜑 → ∀𝑥 ∈ ℝ+𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝑥))
14 climi.3 . 2 (𝜑𝐶 ∈ ℝ+)
153, 13, 14rspcdva 3576 1 (𝜑 → ∃𝑗𝑍𝑘 ∈ (ℤ𝑗)(𝐵 ∈ ℂ ∧ (abs‘(𝐵𝐴)) < 𝐶))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1541  wcel 2110  wral 3045  wrex 3054  Vcvv 3434   class class class wbr 5089  cfv 6477  (class class class)co 7341  cc 10996   < clt 11138  cmin 11336  cz 12460  cuz 12724  +crp 12882  abscabs 15133  cli 15383
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2112  ax-9 2120  ax-10 2143  ax-11 2159  ax-12 2179  ax-ext 2702  ax-sep 5232  ax-nul 5242  ax-pow 5301  ax-pr 5368  ax-un 7663  ax-cnex 11054  ax-resscn 11055  ax-pre-lttri 11072  ax-pre-lttrn 11073
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2067  df-mo 2534  df-eu 2563  df-clab 2709  df-cleq 2722  df-clel 2804  df-nfc 2879  df-ne 2927  df-nel 3031  df-ral 3046  df-rex 3055  df-rab 3394  df-v 3436  df-sbc 3740  df-csb 3849  df-dif 3903  df-un 3905  df-in 3907  df-ss 3917  df-nul 4282  df-if 4474  df-pw 4550  df-sn 4575  df-pr 4577  df-op 4581  df-uni 4858  df-br 5090  df-opab 5152  df-mpt 5171  df-id 5509  df-po 5522  df-so 5523  df-xp 5620  df-rel 5621  df-cnv 5622  df-co 5623  df-dm 5624  df-rn 5625  df-res 5626  df-ima 5627  df-iota 6433  df-fun 6479  df-fn 6480  df-f 6481  df-f1 6482  df-fo 6483  df-f1o 6484  df-fv 6485  df-ov 7344  df-er 8617  df-en 8865  df-dom 8866  df-sdom 8867  df-pnf 11140  df-mnf 11141  df-xr 11142  df-ltxr 11143  df-le 11144  df-neg 11339  df-z 12461  df-uz 12725  df-clim 15387
This theorem is referenced by:  climi2  15410  climi0  15411  climuni  15451  2clim  15471  climcau  15570  caucvgb  15579  stoweidlem7  46024
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