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Theorem crngring 14361
Description: A commutative ring is a ring. (Contributed by Mario Carneiro, 7-Jan-2015.)
Assertion
Ref Expression
crngring  |-  ( R  e.  CRing  ->  R  e.  Ring )

Proof of Theorem crngring
StepHypRef Expression
1 eqid 2238 . . 3  |-  (mulGrp `  R )  =  (mulGrp `  R )
21iscrng 14356 . 2  |-  ( R  e.  CRing 
<->  ( R  e.  Ring  /\  (mulGrp `  R )  e. CMnd ) )
32simplbi 274 1  |-  ( R  e.  CRing  ->  R  e.  Ring )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    e. wcel 2209   ` cfv 5377  CMndccmn 14136  mulGrpcmgp 14266   Ringcrg 14349   CRingccrg 14350
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rex 2534  df-rab 2537  df-v 2823  df-un 3224  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4131  df-iota 5337  df-fv 5385  df-cring 14352
This theorem is used by:  crngringd  14362  crngunit  14467  dvdsunit  14468  unitmulclb  14470  unitabl  14473  rmodislmod  14737  quscrng  14919  cnring  14956  zringring  14977  zring0  14984  znzrh2  15030  zndvds0  15034  znf1o  15035  znidom  15041  znunit  15043
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