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Theorem ghmf 19152
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 2729 . . . 4 (+g𝑆) = (+g𝑆)
4 eqid 2729 . . . 4 (+g𝑇) = (+g𝑇)
51, 2, 3, 4isghm 19147 . . 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 1540  wcel 2109  wral 3044  wf 6507  cfv 6511  (class class class)co 7387  Basecbs 17179  +gcplusg 17220  Grpcgrp 18865   GrpHom cghm 19144
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5251  ax-nul 5261  ax-pow 5320  ax-pr 5387  ax-un 7711
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rab 3406  df-v 3449  df-sbc 3754  df-csb 3863  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-nul 4297  df-if 4489  df-pw 4565  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4872  df-iun 4957  df-br 5108  df-opab 5170  df-mpt 5189  df-id 5533  df-xp 5644  df-rel 5645  df-cnv 5646  df-co 5647  df-dm 5648  df-rn 5649  df-res 5650  df-ima 5651  df-iota 6464  df-fun 6513  df-fn 6514  df-f 6515  df-fv 6519  df-ov 7390  df-oprab 7391  df-mpo 7392  df-1st 7968  df-2nd 7969  df-map 8801  df-ghm 19145
This theorem is referenced by:  ghmid  19154  ghminv  19155  ghmsub  19156  ghmmhm  19158  ghmmulg  19160  ghmrn  19161  resghm  19164  ghmpreima  19170  ghmeql  19171  ghmnsgima  19172  ghmnsgpreima  19173  ghmeqker  19175  ghmf1  19178  kerf1ghm  19179  ghmf1o  19180  gimcnv  19199  ghmqusnsglem1  19212  ghmqusnsg  19214  ghmquskerlem1  19215  ghmquskerco  19216  ghmquskerlem3  19218  ghmqusker  19219  lactghmga  19335  frgpup3lem  19707  frgpup3  19708  ghmplusg  19776  isrnghmmul  20351  rnghmf  20357  rhmf  20394  isrhm2d  20396  lmhmf  20941  lmhmpropd  20980  frgpcyg  21483  psgninv  21491  zrhpsgninv  21494  evpmss  21495  psgnevpmb  21496  psgnodpm  21497  zrhpsgnevpm  21500  zrhpsgnodpm  21501  evlslem2  21986  nmoi  24616  nmoix  24617  nmoi2  24618  nmoleub  24619  nmoeq0  24624  nmoco  24625  nmotri  24627  nmods  24632  nghmcn  24633  aks6d1c1p2  42097  aks6d1c1p3  42098  aks6d1c5lem1  42124
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