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Theorem subrg1cl 20630
Description: A subring contains the multiplicative identity. (Contributed by Stefan O'Rear, 27-Nov-2014.)
Hypothesis
Ref Expression
subrg1cl.a 1 = (1r𝑅)
Assertion
Ref Expression
subrg1cl (𝐴 ∈ (SubRing‘𝑅) → 1𝐴)

Proof of Theorem subrg1cl
StepHypRef Expression
1 eqid 2762 . . . 4 (Base‘𝑅) = (Base‘𝑅)
2 subrg1cl.a . . . 4 1 = (1r𝑅)
31, 2issubrg 20621 . . 3 (𝐴 ∈ (SubRing‘𝑅) ↔ ((𝑅 ∈ Ring ∧ (𝑅s 𝐴) ∈ Ring) ∧ (𝐴 ⊆ (Base‘𝑅) ∧ 1𝐴)))
43simprbi 501 . 2 (𝐴 ∈ (SubRing‘𝑅) → (𝐴 ⊆ (Base‘𝑅) ∧ 1𝐴))
54simprd 499 1 (𝐴 ∈ (SubRing‘𝑅) → 1𝐴)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399   = wceq 1560  wcel 2142  wss 3904  cfv 6521  (class class class)co 7396  Basecbs 17245  s cress 17266  1rcur 20231  Ringcrg 20283  SubRingcsubrg 20619
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-sep 5246  ax-nul 5256  ax-pow 5322  ax-pr 5390
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-nf 1804  df-sb 2091  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3077  df-rex 3087  df-rab 3415  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-pw 4557  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-iota 6477  df-fun 6523  df-fv 6529  df-ov 7399  df-subrg 20620
This theorem is referenced by:  subrg1  20632  subrgsubm  20635  issubrg2  20642  subrgint  20645  subsubrg  20648  primefld1cl  20856  zsssubrg  21477  issubassa2  21944  subrgpsr  22029  mplassa  22073  mplbas2  22095  evlsmaprhm  22184  ply1assa  22261  asclply1subcl  22437  evls1maprhm  22439  isclmp  25159  taylply2  26431  subrgchr  33417  0ringsubrg  33432  fldgensdrg  33501  primefldgen1  33508  ressply1evls1  33761  mplmonprod  33851  drgextlsp  33891  fldgenfldext  33965  evls1fldgencl  33967  fldextrspundgdvdslem  33977  fldextrspundgdvds  33978  ply1annnr  34000  algextdeglem4  34017  rtelextdg2lem  34023  cnsrexpcl  43742  rngunsnply  43746
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