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Theorem ringacl 20352
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 20311 . 2 (𝑅 ∈ Ring → 𝑅 ∈ Grp)
2 ringacl.b . . 3 𝐵 = (Base‘𝑅)
3 ringacl.p . . 3 + = (+g𝑅)
42, 3grpcl 18998 . 2 ((𝑅 ∈ Grp ∧ 𝑋𝐵𝑌𝐵) → (𝑋 + 𝑌) ∈ 𝐵)
51, 4syl3an1 1179 1 ((𝑅 ∈ Ring ∧ 𝑋𝐵𝑌𝐵) → (𝑋 + 𝑌) ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1101   = wceq 1563  wcel 2145  cfv 6525  (class class class)co 7400  Basecbs 17259  +gcplusg 17300  Grpcgrp 18990  Ringcrg 20306
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-ext 2737  ax-nul 5261
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-sb 2094  df-clab 2744  df-cleq 2757  df-clel 2840  df-ne 2961  df-ral 3080  df-rex 3090  df-rab 3418  df-v 3459  df-sbc 3748  df-dif 3910  df-un 3912  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-iota 6481  df-fv 6533  df-ov 7403  df-mgm 18688  df-sgrp 18767  df-mnd 18783  df-grp 18993  df-ring 20308
This theorem is referenced by:  ringcomlem  20353  ringcom  20354  ringlghm  20386  ringrghm  20387  imasring  20403  qusring2  20407  cntzsubr  20682  srngadd  20923  issrngd  20927  lmodprop2d  21014  prdslmodd  21059  rhmpreimaidl  21378  frobrhm  21685  ip2subdi  21754  psrlmod  22069  mpfind  22226  coe1add  22385  mat1ghm  22601  scmatghm  22651  mdetrlin2  22725  mdetunilem5  22734  cpmatacl  22834  mdegaddle  26192  deg1addle2  26220  deg1add  26221  ply1divex  26255  deg1addlt  33807  dvhlveclem  41744  baerlem3lem1  42343  mendlmod  43778  cznrng  48881  lmod1lem3  49120
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