Theorem rrextnrg 33267

Description: An extension of ℝ is a normed ring. (Contributed by Thierry Arnoux, 2-May-2018.)

Assertion

Ref	Expression
rrextnrg	⊢ (𝑅 ∈ ℝExt → 𝑅 ∈ NrmRing)

Proof of Theorem rrextnrg

Step	Hyp	Ref	Expression
1		eqid 2732	. . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅)
2		eqid 2732	. . . 4 ⊢ ((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅))) = ((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅)))
3		eqid 2732	. . . 4 ⊢ (ℤMod‘𝑅) = (ℤMod‘𝑅)
4	1, 2, 3	isrrext 33266	. . 3 ⊢ (𝑅 ∈ ℝExt ↔ ((𝑅 ∈ NrmRing ∧ 𝑅 ∈ DivRing) ∧ ((ℤMod‘𝑅) ∈ NrmMod ∧ (chr‘𝑅) = 0) ∧ (𝑅 ∈ CUnifSp ∧ (UnifSt‘𝑅) = (metUnif‘((dist‘𝑅) ↾ ((Base‘𝑅) × (Base‘𝑅)))))))
5	4	simp1bi 1145	. 2 ⊢ (𝑅 ∈ ℝExt → (𝑅 ∈ NrmRing ∧ 𝑅 ∈ DivRing))
6	5	simpld 495	1 ⊢ (𝑅 ∈ ℝExt → 𝑅 ∈ NrmRing)

Syntax hints:   → wi 4   ∧ wa 396   = wceq 1541   ∈ wcel 2106   × cxp 5674   ↾ cres 5678  ‘cfv 6543  0cc0 11112  Basecbs 17148  distcds 17210  DivRingcdr 20500  metUnifcmetu 21135  ℤModczlm 21269  chrcchr 21270  UnifStcuss 23978  CUnifSpccusp 24022  NrmRingcnrg 24308  NrmModcnlm 24309   ℝExt crrext 33260

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2703

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-sb 2068  df-clab 2710  df-cleq 2724  df-clel 2810  df-rab 3433  df-v 3476  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-nul 4323  df-if 4529  df-sn 4629  df-pr 4631  df-op 4635  df-uni 4909  df-br 5149  df-opab 5211  df-xp 5682  df-res 5688  df-iota 6495  df-fv 6551  df-rrext 33265

This theorem is referenced by:  rrexttps  33272  rrexthaus  33273  rrhfe  33278  rrhcne  33279  rrhqima  33280  sitgclg  33627