Theorem nvcli 28068

Description: The norm of a normed complex vector space is a real number. (Contributed by NM, 20-Apr-2007.) (New usage is discouraged.)

Hypotheses

Ref	Expression
nvf.1	⊢ 𝑋 = (BaseSet‘𝑈)
nvf.6	⊢ 𝑁 = (normCV‘𝑈)
nvcli.9	⊢ 𝑈 ∈ NrmCVec
nvcli.7	⊢ 𝐴 ∈ 𝑋

Assertion

Ref	Expression
nvcli	⊢ (𝑁‘𝐴) ∈ ℝ

Proof of Theorem nvcli

Step	Hyp	Ref	Expression
1		nvcli.9	. 2 ⊢ 𝑈 ∈ NrmCVec
2		nvcli.7	. 2 ⊢ 𝐴 ∈ 𝑋
3		nvf.1	. . 3 ⊢ 𝑋 = (BaseSet‘𝑈)
4		nvf.6	. . 3 ⊢ 𝑁 = (normCV‘𝑈)
5	3, 4	nvcl 28067	. 2 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐴 ∈ 𝑋) → (𝑁‘𝐴) ∈ ℝ)
6	1, 2, 5	mp2an 683	1 ⊢ (𝑁‘𝐴) ∈ ℝ

Syntax hints:   = wceq 1656   ∈ wcel 2164  ‘cfv 6127  ℝcr 10258  NrmCVeccnv 27990  BaseSetcba 27992  norm_CVcnmcv 27996

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1894  ax-4 1908  ax-5 2009  ax-6 2075  ax-7 2112  ax-8 2166  ax-9 2173  ax-10 2192  ax-11 2207  ax-12 2220  ax-13 2389  ax-ext 2803  ax-rep 4996  ax-sep 5007  ax-nul 5015  ax-pow 5067  ax-pr 5129  ax-un 7214

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 879  df-3an 1113  df-tru 1660  df-ex 1879  df-nf 1883  df-sb 2068  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ne 3000  df-ral 3122  df-rex 3123  df-reu 3124  df-rab 3126  df-v 3416  df-sbc 3663  df-csb 3758  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-nul 4147  df-if 4309  df-sn 4400  df-pr 4402  df-op 4406  df-uni 4661  df-iun 4744  df-br 4876  df-opab 4938  df-mpt 4955  df-id 5252  df-xp 5352  df-rel 5353  df-cnv 5354  df-co 5355  df-dm 5356  df-rn 5357  df-res 5358  df-ima 5359  df-iota 6090  df-fun 6129  df-fn 6130  df-f 6131  df-f1 6132  df-fo 6133  df-f1o 6134  df-fv 6135  df-ov 6913  df-oprab 6914  df-1st 7433  df-2nd 7434  df-vc 27965  df-nv 27998  df-va 28001  df-ba 28002  df-sm 28003  df-0v 28004  df-nmcv 28006

This theorem is referenced by:  ip0i  28231  ip1ilem  28232  ipasslem10  28245  siilem1  28257  siii  28259