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Theorem ringacl 20213
Description: Closure of the addition operation of a ring. (Contributed by Mario Carneiro, 14-Jan-2014.)
Hypotheses
Ref Expression
ringacl.b 𝐵 = (Base‘𝑅)
ringacl.p + = (+g𝑅)
Assertion
Ref Expression
ringacl ((𝑅 ∈ Ring ∧ 𝑋𝐵𝑌𝐵) → (𝑋 + 𝑌) ∈ 𝐵)

Proof of Theorem ringacl
StepHypRef Expression
1 ringgrp 20173 . 2 (𝑅 ∈ Ring → 𝑅 ∈ Grp)
2 ringacl.b . . 3 𝐵 = (Base‘𝑅)
3 ringacl.p . . 3 + = (+g𝑅)
42, 3grpcl 18871 . 2 ((𝑅 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 + 𝑌) ∈ 𝐵)
51, 4syl3an1 1163 1 ((𝑅 ∈ Ring ∧ 𝑋𝐵𝑌𝐵) → (𝑋 + 𝑌) ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1086   = wceq 1541  wcel 2113  cfv 6492  (class class class)co 7358  Basecbs 17136  +gcplusg 17177  Grpcgrp 18863  Ringcrg 20168
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 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2708  ax-nul 5251
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2715  df-cleq 2728  df-clel 2811  df-ne 2933  df-ral 3052  df-rex 3061  df-rab 3400  df-v 3442  df-sbc 3741  df-dif 3904  df-un 3906  df-ss 3918  df-nul 4286  df-if 4480  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-br 5099  df-iota 6448  df-fv 6500  df-ov 7361  df-mgm 18565  df-sgrp 18644  df-mnd 18660  df-grp 18866  df-ring 20170
This theorem is referenced by:  ringcomlem  20214  ringcom  20215  ringlghm  20247  ringrghm  20248  imasring  20266  qusring2  20270  cntzsubr  20539  srngadd  20784  issrngd  20788  lmodprop2d  20875  prdslmodd  20920  rhmpreimaidl  21232  frobrhm  21530  ip2subdi  21599  psrlmod  21915  mpfind  22070  coe1add  22206  mat1ghm  22427  scmatghm  22477  mdetrlin2  22551  mdetunilem5  22560  cpmatacl  22660  mdegaddle  26035  deg1addle2  26063  deg1add  26064  ply1divex  26098  deg1addlt  33681  dvhlveclem  41364  baerlem3lem1  41963  mendlmod  43427  cznrng  48503  lmod1lem3  48731
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