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Theorem ghmabl 14045
Description: The image of an abelian group  G under a group homomorphism  F is an abelian group. (Contributed by Mario Carneiro, 12-May-2014.) (Revised by Thierry Arnoux, 26-Jan-2020.)
Hypotheses
Ref Expression
ghmabl.x  |-  X  =  ( Base `  G
)
ghmabl.y  |-  Y  =  ( Base `  H
)
ghmabl.p  |-  .+  =  ( +g  `  G )
ghmabl.q  |-  .+^  =  ( +g  `  H )
ghmabl.f  |-  ( (
ph  /\  x  e.  X  /\  y  e.  X
)  ->  ( F `  ( x  .+  y
) )  =  ( ( F `  x
)  .+^  ( F `  y ) ) )
ghmabl.1  |-  ( ph  ->  F : X -onto-> Y
)
ghmabl.3  |-  ( ph  ->  G  e.  Abel )
Assertion
Ref Expression
ghmabl  |-  ( ph  ->  H  e.  Abel )
Distinct variable groups:    x,  .+ , y    x,  .+^ , y    x, F, y   
x, G, y    x, H, y    x, X, y   
x, Y, y    ph, x, y

Proof of Theorem ghmabl
StepHypRef Expression
1 ghmabl.f . . 3  |-  ( (
ph  /\  x  e.  X  /\  y  e.  X
)  ->  ( F `  ( x  .+  y
) )  =  ( ( F `  x
)  .+^  ( F `  y ) ) )
2 ghmabl.x . . 3  |-  X  =  ( Base `  G
)
3 ghmabl.y . . 3  |-  Y  =  ( Base `  H
)
4 ghmabl.p . . 3  |-  .+  =  ( +g  `  G )
5 ghmabl.q . . 3  |-  .+^  =  ( +g  `  H )
6 ghmabl.1 . . 3  |-  ( ph  ->  F : X -onto-> Y
)
7 ghmabl.3 . . . 4  |-  ( ph  ->  G  e.  Abel )
8 ablgrp 14006 . . . 4  |-  ( G  e.  Abel  ->  G  e. 
Grp )
97, 8syl 14 . . 3  |-  ( ph  ->  G  e.  Grp )
101, 2, 3, 4, 5, 6, 9ghmgrp 13835 . 2  |-  ( ph  ->  H  e.  Grp )
11 ablcmn 14008 . . . 4  |-  ( G  e.  Abel  ->  G  e. CMnd
)
127, 11syl 14 . . 3  |-  ( ph  ->  G  e. CMnd )
132, 3, 4, 5, 1, 6, 12ghmcmn 14044 . 2  |-  ( ph  ->  H  e. CMnd )
14 isabl 14005 . 2  |-  ( H  e.  Abel  <->  ( H  e. 
Grp  /\  H  e. CMnd ) )
1510, 13, 14sylanbrc 417 1  |-  ( ph  ->  H  e.  Abel )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ w3a 1005    = wceq 1398    e. wcel 2203   -onto->wfo 5350   ` cfv 5352  (class class class)co 6050   Basecbs 13212   +g cplusg 13290   Grpcgrp 13713  CMndccmn 14001   Abelcabl 14002
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4225  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-cnex 8218  ax-resscn 8219  ax-1re 8221  ax-addrcl 8224
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-reu 2527  df-rmo 2528  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-riota 6003  df-ov 6053  df-inn 9238  df-2 9296  df-ndx 13215  df-slot 13216  df-base 13218  df-plusg 13303  df-0g 13471  df-mgm 13569  df-sgrp 13615  df-mnd 13630  df-grp 13716  df-minusg 13717  df-cmn 14003  df-abl 14004
This theorem is referenced by: (None)
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