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Theorem ghmf 19147
Description: A group homomorphism is a function. (Contributed by Stefan O'Rear, 31-Dec-2014.)
Hypotheses
Ref Expression
ghmf.x 𝑋 = (Base‘𝑆)
ghmf.y 𝑌 = (Base‘𝑇)
Assertion
Ref Expression
ghmf (𝐹 ∈ (𝑆 GrpHom 𝑇) → 𝐹:𝑋𝑌)

Proof of Theorem ghmf
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ghmf.x . . . 4 𝑋 = (Base‘𝑆)
2 ghmf.y . . . 4 𝑌 = (Base‘𝑇)
3 eqid 2734 . . . 4 (+g𝑆) = (+g𝑆)
4 eqid 2734 . . . 4 (+g𝑇) = (+g𝑇)
51, 2, 3, 4isghm 19142 . . 3 (𝐹 ∈ (𝑆 GrpHom 𝑇) ↔ ((𝑆 ∈ Grp ∧ 𝑇 ∈ Grp) ∧ (𝐹:𝑋𝑌 ∧ ∀𝑦𝑋𝑥𝑋 (𝐹‘(𝑦(+g𝑆)𝑥)) = ((𝐹𝑦)(+g𝑇)(𝐹𝑥)))))
65simprbi 496 . 2 (𝐹 ∈ (𝑆 GrpHom 𝑇) → (𝐹:𝑋𝑌 ∧ ∀𝑦𝑋𝑥𝑋 (𝐹‘(𝑦(+g𝑆)𝑥)) = ((𝐹𝑦)(+g𝑇)(𝐹𝑥))))
76simpld 494 1 (𝐹 ∈ (𝑆 GrpHom 𝑇) → 𝐹:𝑋𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1541  wcel 2113  wral 3049  wf 6486  cfv 6490  (class class class)co 7356  Basecbs 17134  +gcplusg 17175  Grpcgrp 18861   GrpHom cghm 19139
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2706  ax-sep 5239  ax-nul 5249  ax-pow 5308  ax-pr 5375  ax-un 7678
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2567  df-clab 2713  df-cleq 2726  df-clel 2809  df-nfc 2883  df-ne 2931  df-ral 3050  df-rex 3059  df-rab 3398  df-v 3440  df-sbc 3739  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4284  df-if 4478  df-pw 4554  df-sn 4579  df-pr 4581  df-op 4585  df-uni 4862  df-iun 4946  df-br 5097  df-opab 5159  df-mpt 5178  df-id 5517  df-xp 5628  df-rel 5629  df-cnv 5630  df-co 5631  df-dm 5632  df-rn 5633  df-res 5634  df-ima 5635  df-iota 6446  df-fun 6492  df-fn 6493  df-f 6494  df-fv 6498  df-ov 7359  df-oprab 7360  df-mpo 7361  df-1st 7931  df-2nd 7932  df-map 8763  df-ghm 19140
This theorem is referenced by:  ghmid  19149  ghminv  19150  ghmsub  19151  ghmmhm  19153  ghmmulg  19155  ghmrn  19156  resghm  19159  ghmpreima  19165  ghmeql  19166  ghmnsgima  19167  ghmnsgpreima  19168  ghmeqker  19170  ghmf1  19173  kerf1ghm  19174  ghmf1o  19175  gimcnv  19194  ghmqusnsglem1  19207  ghmqusnsg  19209  ghmquskerlem1  19210  ghmquskerco  19211  ghmquskerlem3  19213  ghmqusker  19214  lactghmga  19332  frgpup3lem  19704  frgpup3  19705  ghmplusg  19773  isrnghmmul  20376  rnghmf  20382  rhmf  20418  isrhm2d  20420  lmhmf  20984  lmhmpropd  21023  frgpcyg  21526  psgninv  21535  zrhpsgninv  21538  evpmss  21539  psgnevpmb  21540  psgnodpm  21541  zrhpsgnevpm  21544  zrhpsgnodpm  21545  evlslem2  22032  nmoi  24670  nmoix  24671  nmoi2  24672  nmoleub  24673  nmoeq0  24678  nmoco  24679  nmotri  24681  nmods  24686  nghmcn  24687  aks6d1c1p2  42302  aks6d1c1p3  42303  aks6d1c5lem1  42329
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