Theorem sdrgdrng 20637

Description: A sub-division-ring is a division ring. (Contributed by SN, 19-Feb-2025.)

Hypothesis

Ref	Expression
sdrgdrng.1	⊢ 𝑆 = (𝑅 ↾s 𝐴)

Assertion

Ref	Expression
sdrgdrng	⊢ (𝐴 ∈ (SubDRing‘𝑅) → 𝑆 ∈ DivRing)

Proof of Theorem sdrgdrng

Step	Hyp	Ref	Expression
1		sdrgdrng.1	. 2 ⊢ 𝑆 = (𝑅 ↾s 𝐴)
2		issdrg 20635	. . 3 ⊢ (𝐴 ∈ (SubDRing‘𝑅) ↔ (𝑅 ∈ DivRing ∧ 𝐴 ∈ (SubRing‘𝑅) ∧ (𝑅 ↾s 𝐴) ∈ DivRing))
3	2	simp3bi 1146	. 2 ⊢ (𝐴 ∈ (SubDRing‘𝑅) → (𝑅 ↾s 𝐴) ∈ DivRing)
4	1, 3	eqeltrid 2836	1 ⊢ (𝐴 ∈ (SubDRing‘𝑅) → 𝑆 ∈ DivRing)

Syntax hints:   → wi 4   = wceq 1540   ∈ wcel 2105  ‘cfv 6543  (class class class)co 7412   ↾_s cress 17180  SubRingcsubrg 20465  DivRingcdr 20583  SubDRingcsdrg 20633

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1912  ax-6 1970  ax-7 2010  ax-8 2107  ax-9 2115  ax-10 2136  ax-11 2153  ax-12 2170  ax-ext 2702  ax-sep 5299  ax-nul 5306  ax-pr 5427

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1781  df-nf 1785  df-sb 2067  df-mo 2533  df-eu 2562  df-clab 2709  df-cleq 2723  df-clel 2809  df-nfc 2884  df-ne 2940  df-ral 3061  df-rex 3070  df-rab 3432  df-v 3475  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-mpt 5232  df-id 5574  df-xp 5682  df-rel 5683  df-cnv 5684  df-co 5685  df-dm 5686  df-rn 5687  df-res 5688  df-ima 5689  df-iota 6495  df-fun 6545  df-fv 6551  df-ov 7415  df-sdrg 20634

This theorem is referenced by:  sdrgunit  20643  minplyirredlem  33223  minplyirred  33224  irngnminplynz  33225  minplym1p  33226  algextdeglem4  33230  algextdeglem8  33234