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Theorem ablnsg 14138
Description: Every subgroup of an abelian group is normal. (Contributed by Mario Carneiro, 14-Jun-2015.)
Assertion
Ref Expression
ablnsg  |-  ( G  e.  Abel  ->  (NrmSGrp `  G
)  =  (SubGrp `  G ) )

Proof of Theorem ablnsg
Dummy variables  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2238 . . . . . . 7  |-  ( Base `  G )  =  (
Base `  G )
2 eqid 2238 . . . . . . 7  |-  ( +g  `  G )  =  ( +g  `  G )
31, 2ablcom 14106 . . . . . 6  |-  ( ( G  e.  Abel  /\  y  e.  ( Base `  G
)  /\  z  e.  ( Base `  G )
)  ->  ( y
( +g  `  G ) z )  =  ( z ( +g  `  G
) y ) )
433expb 1235 . . . . 5  |-  ( ( G  e.  Abel  /\  (
y  e.  ( Base `  G )  /\  z  e.  ( Base `  G
) ) )  -> 
( y ( +g  `  G ) z )  =  ( z ( +g  `  G ) y ) )
54eleq1d 2307 . . . 4  |-  ( ( G  e.  Abel  /\  (
y  e.  ( Base `  G )  /\  z  e.  ( Base `  G
) ) )  -> 
( ( y ( +g  `  G ) z )  e.  x  <->  ( z ( +g  `  G
) y )  e.  x ) )
65ralrimivva 2632 . . 3  |-  ( G  e.  Abel  ->  A. y  e.  ( Base `  G
) A. z  e.  ( Base `  G
) ( ( y ( +g  `  G
) z )  e.  x  <->  ( z ( +g  `  G ) y )  e.  x
) )
71, 2isnsg 14005 . . . 4  |-  ( x  e.  (NrmSGrp `  G
)  <->  ( x  e.  (SubGrp `  G )  /\  A. y  e.  (
Base `  G ) A. z  e.  ( Base `  G ) ( ( y ( +g  `  G ) z )  e.  x  <->  ( z
( +g  `  G ) y )  e.  x
) ) )
87rbaib 933 . . 3  |-  ( A. y  e.  ( Base `  G ) A. z  e.  ( Base `  G
) ( ( y ( +g  `  G
) z )  e.  x  <->  ( z ( +g  `  G ) y )  e.  x
)  ->  ( x  e.  (NrmSGrp `  G )  <->  x  e.  (SubGrp `  G
) ) )
96, 8syl 14 . 2  |-  ( G  e.  Abel  ->  ( x  e.  (NrmSGrp `  G
)  <->  x  e.  (SubGrp `  G ) ) )
109eqrdv 2236 1  |-  ( G  e.  Abel  ->  (NrmSGrp `  G
)  =  (SubGrp `  G ) )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1402    e. wcel 2209   A.wral 2528   ` cfv 5377  (class class class)co 6085   Basecbs 13352   +g cplusg 13431  SubGrpcsubg 13970  NrmSGrpcnsg 13971   Abelcabl 14088
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-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-cnex 8270  ax-resscn 8271  ax-1re 8273  ax-addrcl 8276
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fn 5380  df-fv 5385  df-ov 6088  df-inn 9305  df-2 9363  df-ndx 13355  df-slot 13356  df-base 13358  df-plusg 13444  df-subg 13973  df-nsg 13974  df-cmn 14089  df-abl 14090
This theorem is used by:  rngansg  14249  qus2idrng  14862  qus1  14863  qusrhm  14865
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