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Theorem ablnsg 13540
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 2196 . . . . . . 7  |-  ( Base `  G )  =  (
Base `  G )
2 eqid 2196 . . . . . . 7  |-  ( +g  `  G )  =  ( +g  `  G )
31, 2ablcom 13509 . . . . . 6  |-  ( ( G  e.  Abel  /\  y  e.  ( Base `  G
)  /\  z  e.  ( Base `  G )
)  ->  ( y
( +g  `  G ) z )  =  ( z ( +g  `  G
) y ) )
433expb 1206 . . . . 5  |-  ( ( G  e.  Abel  /\  (
y  e.  ( Base `  G )  /\  z  e.  ( Base `  G
) ) )  -> 
( y ( +g  `  G ) z )  =  ( z ( +g  `  G ) y ) )
54eleq1d 2265 . . . 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 2579 . . 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 13408 . . . 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 922 . . 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 2194 1  |-  ( G  e.  Abel  ->  (NrmSGrp `  G
)  =  (SubGrp `  G ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1364    e. wcel 2167   A.wral 2475   ` cfv 5259  (class class class)co 5925   Basecbs 12703   +g cplusg 12780  SubGrpcsubg 13373  NrmSGrpcnsg 13374   Abelcabl 13491
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-cnex 7987  ax-resscn 7988  ax-1re 7990  ax-addrcl 7993
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-un 3161  df-in 3163  df-ss 3170  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-int 3876  df-br 4035  df-opab 4096  df-mpt 4097  df-id 4329  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-ima 4677  df-iota 5220  df-fun 5261  df-fn 5262  df-fv 5267  df-ov 5928  df-inn 9008  df-2 9066  df-ndx 12706  df-slot 12707  df-base 12709  df-plusg 12793  df-subg 13376  df-nsg 13377  df-cmn 13492  df-abl 13493
This theorem is referenced by:  rngansg  13582  qus2idrng  14157  qus1  14158  qusrhm  14160
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