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Theorem ghmf 19195
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 2736 . . . 4 (+g𝑆) = (+g𝑆)
4 eqid 2736 . . . 4 (+g𝑇) = (+g𝑇)
51, 2, 3, 4isghm 19190 . . 3 (𝐹 ∈ (𝑆 GrpHom 𝑇) ↔ ((𝑆 ∈ Grp ∧ 𝑇 ∈ Grp) ∧ (𝐹:𝑋𝑌 ∧ ∀𝑦𝑋𝑥𝑋 (𝐹‘(𝑦(+g𝑆)𝑥)) = ((𝐹𝑦)(+g𝑇)(𝐹𝑥)))))
65simprbi 497 . 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 1542  wcel 2114  wral 3051  wf 6494  cfv 6498  (class class class)co 7367  Basecbs 17179  +gcplusg 17220  Grpcgrp 18909   GrpHom cghm 19187
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-nul 5241  ax-pow 5307  ax-pr 5375  ax-un 7689
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-rab 3390  df-v 3431  df-sbc 3729  df-csb 3838  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-iun 4935  df-br 5086  df-opab 5148  df-mpt 5167  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-iota 6454  df-fun 6500  df-fn 6501  df-f 6502  df-fv 6506  df-ov 7370  df-oprab 7371  df-mpo 7372  df-1st 7942  df-2nd 7943  df-map 8775  df-ghm 19188
This theorem is referenced by:  ghmid  19197  ghminv  19198  ghmsub  19199  ghmmhm  19201  ghmmulg  19203  ghmrn  19204  resghm  19207  ghmpreima  19213  ghmeql  19214  ghmnsgima  19215  ghmnsgpreima  19216  ghmeqker  19218  ghmf1  19221  kerf1ghm  19222  ghmf1o  19223  gimcnv  19242  ghmqusnsglem1  19255  ghmqusnsg  19257  ghmquskerlem1  19258  ghmquskerco  19259  ghmquskerlem3  19261  ghmqusker  19262  lactghmga  19380  frgpup3lem  19752  frgpup3  19753  ghmplusg  19821  isrnghmmul  20422  rnghmf  20428  rhmf  20464  isrhm2d  20466  lmhmf  21029  lmhmpropd  21068  frgpcyg  21553  psgninv  21562  zrhpsgninv  21565  evpmss  21566  psgnevpmb  21567  psgnodpm  21568  zrhpsgnevpm  21571  zrhpsgnodpm  21572  evlslem2  22057  nmoi  24693  nmoix  24694  nmoi2  24695  nmoleub  24696  nmoeq0  24701  nmoco  24702  nmotri  24704  nmods  24709  nghmcn  24710  aks6d1c1p2  42548  aks6d1c1p3  42549  aks6d1c5lem1  42575
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