Theorem nvf 28535

Description: Mapping for the norm function. (Contributed by NM, 11-Nov-2006.) (New usage is discouraged.)

Hypotheses

Ref	Expression
nvf.1	⊢ 𝑋 = (BaseSet‘𝑈)
nvf.6	⊢ 𝑁 = (normCV‘𝑈)

Assertion

Ref	Expression
nvf	⊢ (𝑈 ∈ NrmCVec → 𝑁:𝑋⟶ℝ)

Proof of Theorem nvf

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nvf.1	. . 3 ⊢ 𝑋 = (BaseSet‘𝑈)
2		eqid 2759	. . 3 ⊢ ( +𝑣 ‘𝑈) = ( +𝑣 ‘𝑈)
3		eqid 2759	. . 3 ⊢ ( ·𝑠OLD ‘𝑈) = ( ·𝑠OLD ‘𝑈)
4		eqid 2759	. . 3 ⊢ (0vec‘𝑈) = (0vec‘𝑈)
5		nvf.6	. . 3 ⊢ 𝑁 = (normCV‘𝑈)
6	1, 2, 3, 4, 5	nvi 28489	. 2 ⊢ (𝑈 ∈ NrmCVec → (⟨( +𝑣 ‘𝑈), ( ·𝑠OLD ‘𝑈)⟩ ∈ CVecOLD ∧ 𝑁:𝑋⟶ℝ ∧ ∀𝑥 ∈ 𝑋 (((𝑁‘𝑥) = 0 → 𝑥 = (0vec‘𝑈)) ∧ ∀𝑦 ∈ ℂ (𝑁‘(𝑦( ·𝑠OLD ‘𝑈)𝑥)) = ((abs‘𝑦) · (𝑁‘𝑥)) ∧ ∀𝑦 ∈ 𝑋 (𝑁‘(𝑥( +𝑣 ‘𝑈)𝑦)) ≤ ((𝑁‘𝑥) + (𝑁‘𝑦)))))
7	6	simp2d 1141	1 ⊢ (𝑈 ∈ NrmCVec → 𝑁:𝑋⟶ℝ)

Syntax hints:   → wi 4   ∧ w3a 1085   = wceq 1539   ∈ wcel 2112  ∀wral 3071  ⟨cop 4529   class class class wbr 5033  ⟶wf 6332  ‘cfv 6336  (class class class)co 7151  ℂcc 10566  ℝcr 10567  0cc0 10568   + caddc 10571   · cmul 10573   ≤ cle 10707  abscabs 14634  CVec_OLDcvc 28433  NrmCVeccnv 28459   +_𝑣 cpv 28460  BaseSetcba 28461   ·_𝑠OLD cns 28462  0_veccn0v 28463  norm_CVcnmcv 28465

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2730  ax-rep 5157  ax-sep 5170  ax-nul 5177  ax-pr 5299  ax-un 7460

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 846  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2071  df-mo 2558  df-eu 2589  df-clab 2737  df-cleq 2751  df-clel 2831  df-nfc 2902  df-ne 2953  df-ral 3076  df-rex 3077  df-reu 3078  df-rab 3080  df-v 3412  df-sbc 3698  df-csb 3807  df-dif 3862  df-un 3864  df-in 3866  df-ss 3876  df-nul 4227  df-if 4422  df-sn 4524  df-pr 4526  df-op 4530  df-uni 4800  df-iun 4886  df-br 5034  df-opab 5096  df-mpt 5114  df-id 5431  df-xp 5531  df-rel 5532  df-cnv 5533  df-co 5534  df-dm 5535  df-rn 5536  df-res 5537  df-ima 5538  df-iota 6295  df-fun 6338  df-fn 6339  df-f 6340  df-f1 6341  df-fo 6342  df-f1o 6343  df-fv 6344  df-ov 7154  df-oprab 7155  df-1st 7694  df-2nd 7695  df-vc 28434  df-nv 28467  df-va 28470  df-ba 28471  df-sm 28472  df-0v 28473  df-nmcv 28475

This theorem is referenced by:  nvcl  28536  imsdf  28564  nmcvcn  28570  sspn  28611  hilnormi  29038