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Theorem ringacl 20163
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 20123 . 2 (𝑅 ∈ Ring → 𝑅 ∈ Grp)
2 ringacl.b . . 3 𝐵 = (Base‘𝑅)
3 ringacl.p . . 3 + = (+g𝑅)
42, 3grpcl 18820 . 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 1540  wcel 2109  cfv 6482  (class class class)co 7349  Basecbs 17120  +gcplusg 17161  Grpcgrp 18812  Ringcrg 20118
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2701  ax-nul 5245
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2708  df-cleq 2721  df-clel 2803  df-ne 2926  df-ral 3045  df-rex 3054  df-rab 3395  df-v 3438  df-sbc 3743  df-dif 3906  df-un 3908  df-ss 3920  df-nul 4285  df-if 4477  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4859  df-br 5093  df-iota 6438  df-fv 6490  df-ov 7352  df-mgm 18514  df-sgrp 18593  df-mnd 18609  df-grp 18815  df-ring 20120
This theorem is referenced by:  ringcomlem  20164  ringcom  20165  ringlghm  20197  ringrghm  20198  imasring  20215  qusring2  20219  cntzsubr  20491  srngadd  20736  issrngd  20740  lmodprop2d  20827  prdslmodd  20872  rhmpreimaidl  21184  frobrhm  21482  ip2subdi  21551  psrlmod  21867  mpfind  22012  coe1add  22148  mat1ghm  22368  scmatghm  22418  mdetrlin2  22492  mdetunilem5  22501  cpmatacl  22601  mdegaddle  25977  deg1addle2  26005  deg1add  26006  ply1divex  26040  deg1addlt  33541  dvhlveclem  41107  baerlem3lem1  41706  mendlmod  43182  cznrng  48265  lmod1lem3  48494
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