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Theorem isnvi 26664
Description: Properties that determine a normed complex vector space. (Contributed by NM, 15-Apr-2007.) (New usage is discouraged.)
Hypotheses
Ref Expression
isnvi.5 𝑋 = ran 𝐺
isnvi.6 𝑍 = (GId‘𝐺)
isnvi.7 𝐺, 𝑆⟩ ∈ CVecOLD
isnvi.8 𝑁:𝑋⟶ℝ
isnvi.9 ((𝑥𝑋 ∧ (𝑁𝑥) = 0) → 𝑥 = 𝑍)
isnvi.10 ((𝑦 ∈ ℂ ∧ 𝑥𝑋) → (𝑁‘(𝑦𝑆𝑥)) = ((abs‘𝑦) · (𝑁𝑥)))
isnvi.11 ((𝑥𝑋𝑦𝑋) → (𝑁‘(𝑥𝐺𝑦)) ≤ ((𝑁𝑥) + (𝑁𝑦)))
isnvi.12 𝑈 = ⟨⟨𝐺, 𝑆⟩, 𝑁
Assertion
Ref Expression
isnvi 𝑈 ∈ NrmCVec
Distinct variable groups:   𝑥,𝑦,𝐺   𝑥,𝑁,𝑦   𝑥,𝑆,𝑦   𝑥,𝑋,𝑦
Allowed substitution hints:   𝑈(𝑥,𝑦)   𝑍(𝑥,𝑦)

Proof of Theorem isnvi
StepHypRef Expression
1 isnvi.12 . 2 𝑈 = ⟨⟨𝐺, 𝑆⟩, 𝑁
2 isnvi.7 . . 3 𝐺, 𝑆⟩ ∈ CVecOLD
3 isnvi.8 . . 3 𝑁:𝑋⟶ℝ
4 isnvi.9 . . . . . 6 ((𝑥𝑋 ∧ (𝑁𝑥) = 0) → 𝑥 = 𝑍)
54ex 448 . . . . 5 (𝑥𝑋 → ((𝑁𝑥) = 0 → 𝑥 = 𝑍))
6 isnvi.10 . . . . . . 7 ((𝑦 ∈ ℂ ∧ 𝑥𝑋) → (𝑁‘(𝑦𝑆𝑥)) = ((abs‘𝑦) · (𝑁𝑥)))
76ancoms 467 . . . . . 6 ((𝑥𝑋𝑦 ∈ ℂ) → (𝑁‘(𝑦𝑆𝑥)) = ((abs‘𝑦) · (𝑁𝑥)))
87ralrimiva 2948 . . . . 5 (𝑥𝑋 → ∀𝑦 ∈ ℂ (𝑁‘(𝑦𝑆𝑥)) = ((abs‘𝑦) · (𝑁𝑥)))
9 isnvi.11 . . . . . 6 ((𝑥𝑋𝑦𝑋) → (𝑁‘(𝑥𝐺𝑦)) ≤ ((𝑁𝑥) + (𝑁𝑦)))
109ralrimiva 2948 . . . . 5 (𝑥𝑋 → ∀𝑦𝑋 (𝑁‘(𝑥𝐺𝑦)) ≤ ((𝑁𝑥) + (𝑁𝑦)))
115, 8, 103jca 1234 . . . 4 (𝑥𝑋 → (((𝑁𝑥) = 0 → 𝑥 = 𝑍) ∧ ∀𝑦 ∈ ℂ (𝑁‘(𝑦𝑆𝑥)) = ((abs‘𝑦) · (𝑁𝑥)) ∧ ∀𝑦𝑋 (𝑁‘(𝑥𝐺𝑦)) ≤ ((𝑁𝑥) + (𝑁𝑦))))
1211rgen 2905 . . 3 𝑥𝑋 (((𝑁𝑥) = 0 → 𝑥 = 𝑍) ∧ ∀𝑦 ∈ ℂ (𝑁‘(𝑦𝑆𝑥)) = ((abs‘𝑦) · (𝑁𝑥)) ∧ ∀𝑦𝑋 (𝑁‘(𝑥𝐺𝑦)) ≤ ((𝑁𝑥) + (𝑁𝑦)))
13 isnvi.5 . . . 4 𝑋 = ran 𝐺
14 isnvi.6 . . . 4 𝑍 = (GId‘𝐺)
1513, 14isnv 26663 . . 3 (⟨⟨𝐺, 𝑆⟩, 𝑁⟩ ∈ NrmCVec ↔ (⟨𝐺, 𝑆⟩ ∈ CVecOLD𝑁:𝑋⟶ℝ ∧ ∀𝑥𝑋 (((𝑁𝑥) = 0 → 𝑥 = 𝑍) ∧ ∀𝑦 ∈ ℂ (𝑁‘(𝑦𝑆𝑥)) = ((abs‘𝑦) · (𝑁𝑥)) ∧ ∀𝑦𝑋 (𝑁‘(𝑥𝐺𝑦)) ≤ ((𝑁𝑥) + (𝑁𝑦)))))
162, 3, 12, 15mpbir3an 1236 . 2 ⟨⟨𝐺, 𝑆⟩, 𝑁⟩ ∈ NrmCVec
171, 16eqeltri 2683 1 𝑈 ∈ NrmCVec
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 382  w3a 1030   = wceq 1474  wcel 1976  wral 2895  cop 4130   class class class wbr 4577  ran crn 5029  wf 5786  cfv 5790  (class class class)co 6527  cc 9791  cr 9792  0cc0 9793   + caddc 9796   · cmul 9798  cle 9932  abscabs 13771  GIdcgi 26522  CVecOLDcvc 26594  NrmCVeccnv 26635
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 4712  ax-pr 4828  ax-un 6825
This theorem depends on definitions:  df-bi 195  df-or 383  df-an 384  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-ral 2900  df-rex 2901  df-reu 2902  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-nul 3874  df-if 4036  df-sn 4125  df-pr 4127  df-op 4131  df-uni 4367  df-iun 4451  df-br 4578  df-opab 4638  df-mpt 4639  df-id 4943  df-xp 5034  df-rel 5035  df-cnv 5036  df-co 5037  df-dm 5038  df-rn 5039  df-res 5040  df-ima 5041  df-iota 5754  df-fun 5792  df-fn 5793  df-f 5794  df-f1 5795  df-fo 5796  df-f1o 5797  df-fv 5798  df-ov 6530  df-oprab 6531  df-vc 26595  df-nv 26643
This theorem is referenced by:  cnnv  26740  hhnv  27240  hhssnv  27339
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