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Theorem ringacl 20198
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 20158 . 2 (𝑅 ∈ Ring → 𝑅 ∈ Grp)
2 ringacl.b . . 3 𝐵 = (Base‘𝑅)
3 ringacl.p . . 3 + = (+g𝑅)
42, 3grpcl 18856 . 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 6486  (class class class)co 7352  Basecbs 17122  +gcplusg 17163  Grpcgrp 18848  Ringcrg 20153
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 2705  ax-nul 5246
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 2712  df-cleq 2725  df-clel 2808  df-ne 2930  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-sbc 3738  df-dif 3901  df-un 3903  df-ss 3915  df-nul 4283  df-if 4475  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-br 5094  df-iota 6442  df-fv 6494  df-ov 7355  df-mgm 18550  df-sgrp 18629  df-mnd 18645  df-grp 18851  df-ring 20155
This theorem is referenced by:  ringcomlem  20199  ringcom  20200  ringlghm  20232  ringrghm  20233  imasring  20250  qusring2  20254  cntzsubr  20523  srngadd  20768  issrngd  20772  lmodprop2d  20859  prdslmodd  20904  rhmpreimaidl  21216  frobrhm  21514  ip2subdi  21583  psrlmod  21898  mpfind  22043  coe1add  22179  mat1ghm  22399  scmatghm  22449  mdetrlin2  22523  mdetunilem5  22532  cpmatacl  22632  mdegaddle  26007  deg1addle2  26035  deg1add  26036  ply1divex  26070  deg1addlt  33567  dvhlveclem  41228  baerlem3lem1  41827  mendlmod  43307  cznrng  48386  lmod1lem3  48615
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