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Theorem ghmf 19260
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 2740 . . . 4 (+g𝑆) = (+g𝑆)
4 eqid 2740 . . . 4 (+g𝑇) = (+g𝑇)
51, 2, 3, 4isghm 19255 . . 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 1537  wcel 2108  wral 3067  wf 6569  cfv 6573  (class class class)co 7448  Basecbs 17258  +gcplusg 17311  Grpcgrp 18973   GrpHom cghm 19252
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pow 5383  ax-pr 5447  ax-un 7770
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-sbc 3805  df-csb 3922  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-iun 5017  df-br 5167  df-opab 5229  df-mpt 5250  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713  df-iota 6525  df-fun 6575  df-fn 6576  df-f 6577  df-fv 6581  df-ov 7451  df-oprab 7452  df-mpo 7453  df-1st 8030  df-2nd 8031  df-map 8886  df-ghm 19253
This theorem is referenced by:  ghmid  19262  ghminv  19263  ghmsub  19264  ghmmhm  19266  ghmmulg  19268  ghmrn  19269  resghm  19272  ghmpreima  19278  ghmeql  19279  ghmnsgima  19280  ghmnsgpreima  19281  ghmeqker  19283  ghmf1  19286  kerf1ghm  19287  ghmf1o  19288  gimcnv  19307  ghmqusnsglem1  19320  ghmqusnsg  19322  ghmquskerlem1  19323  ghmquskerco  19324  ghmquskerlem3  19326  ghmqusker  19327  lactghmga  19447  frgpup3lem  19819  frgpup3  19820  ghmplusg  19888  isrnghmmul  20468  rnghmf  20474  rhmf  20511  isrhm2d  20513  lmhmf  21056  lmhmpropd  21095  frgpcyg  21615  psgninv  21623  zrhpsgninv  21626  evpmss  21627  psgnevpmb  21628  psgnodpm  21629  zrhpsgnevpm  21632  zrhpsgnodpm  21633  evlslem2  22126  nmoi  24770  nmoix  24771  nmoi2  24772  nmoleub  24773  nmoeq0  24778  nmoco  24779  nmotri  24781  nmods  24786  nghmcn  24787  aks6d1c1p2  42066  aks6d1c1p3  42067  aks6d1c5lem1  42093
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