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Theorem sdrgsubrg 20809
Description: A sub-division-ring is a subring. (Contributed by SN, 19-Feb-2025.)
Assertion
Ref Expression
sdrgsubrg (𝐴 ∈ (SubDRing‘𝑅) → 𝐴 ∈ (SubRing‘𝑅))

Proof of Theorem sdrgsubrg
StepHypRef Expression
1 issdrg 20806 . 2 (𝐴 ∈ (SubDRing‘𝑅) ↔ (𝑅 ∈ DivRing ∧ 𝐴 ∈ (SubRing‘𝑅) ∧ (𝑅s 𝐴) ∈ DivRing))
21simp2bi 1145 1 (𝐴 ∈ (SubDRing‘𝑅) → 𝐴 ∈ (SubRing‘𝑅))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2106  cfv 6563  (class class class)co 7431  s cress 17274  SubRingcsubrg 20586  DivRingcdr 20746  SubDRingcsdrg 20804
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pr 5438
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ne 2939  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5583  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-rn 5700  df-res 5701  df-ima 5702  df-iota 6516  df-fun 6565  df-fv 6571  df-ov 7434  df-sdrg 20805
This theorem is referenced by:  sdrgunit  20814  imadrhmcl  20815  fldgenfldext  33693  evls1fldgencl  33695  minplymindeg  33716  minplyann  33717  minplyirredlem  33718  minplyirred  33719  irngnminplynz  33720  minplym1p  33721  irredminply  33722  algextdeglem4  33726  algextdeglem5  33727  algextdeglem6  33728  algextdeglem7  33729  algextdeglem8  33730  rtelextdg2lem  33732  constrelextdg2  33752
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