Theorem nvcli 28437

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 28436	. 2 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐴 ∈ 𝑋) → (𝑁‘𝐴) ∈ ℝ)
6	1, 2, 5	mp2an 690	1 ⊢ (𝑁‘𝐴) ∈ ℝ

Syntax hints:   = wceq 1536   ∈ wcel 2113  ‘cfv 6348  ℝcr 10529  NrmCVeccnv 28359  BaseSetcba 28361  norm_CVcnmcv 28365

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2792  ax-rep 5183  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5323  ax-un 7454

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1084  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2799  df-cleq 2813  df-clel 2892  df-nfc 2962  df-ne 3016  df-ral 3142  df-rex 3143  df-reu 3144  df-rab 3146  df-v 3493  df-sbc 3769  df-csb 3877  df-dif 3932  df-un 3934  df-in 3936  df-ss 3945  df-nul 4285  df-if 4461  df-sn 4561  df-pr 4563  df-op 4567  df-uni 4832  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5453  df-xp 5554  df-rel 5555  df-cnv 5556  df-co 5557  df-dm 5558  df-rn 5559  df-res 5560  df-ima 5561  df-iota 6307  df-fun 6350  df-fn 6351  df-f 6352  df-f1 6353  df-fo 6354  df-f1o 6355  df-fv 6356  df-ov 7152  df-oprab 7153  df-1st 7682  df-2nd 7683  df-vc 28334  df-nv 28367  df-va 28370  df-ba 28371  df-sm 28372  df-0v 28373  df-nmcv 28375

This theorem is referenced by:  ip0i  28600  ip1ilem  28601  ipasslem10  28614  siilem1  28626  siii  28628