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Theorem ghmf 19149
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 19144 . . 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 3051  wf 6488  cfv 6492  (class class class)co 7358  Basecbs 17136  +gcplusg 17177  Grpcgrp 18863   GrpHom cghm 19141
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 2184  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680
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 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-fv 6500  df-ov 7361  df-oprab 7362  df-mpo 7363  df-1st 7933  df-2nd 7934  df-map 8765  df-ghm 19142
This theorem is referenced by:  ghmid  19151  ghminv  19152  ghmsub  19153  ghmmhm  19155  ghmmulg  19157  ghmrn  19158  resghm  19161  ghmpreima  19167  ghmeql  19168  ghmnsgima  19169  ghmnsgpreima  19170  ghmeqker  19172  ghmf1  19175  kerf1ghm  19176  ghmf1o  19177  gimcnv  19196  ghmqusnsglem1  19209  ghmqusnsg  19211  ghmquskerlem1  19212  ghmquskerco  19213  ghmquskerlem3  19215  ghmqusker  19216  lactghmga  19334  frgpup3lem  19706  frgpup3  19707  ghmplusg  19775  isrnghmmul  20378  rnghmf  20384  rhmf  20420  isrhm2d  20422  lmhmf  20986  lmhmpropd  21025  frgpcyg  21528  psgninv  21537  zrhpsgninv  21540  evpmss  21541  psgnevpmb  21542  psgnodpm  21543  zrhpsgnevpm  21546  zrhpsgnodpm  21547  evlslem2  22034  nmoi  24672  nmoix  24673  nmoi2  24674  nmoleub  24675  nmoeq0  24680  nmoco  24681  nmotri  24683  nmods  24688  nghmcn  24689  aks6d1c1p2  42363  aks6d1c1p3  42364  aks6d1c5lem1  42390
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