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Theorem ghmf 19161
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 2737 . . . 4 (+g𝑆) = (+g𝑆)
4 eqid 2737 . . . 4 (+g𝑇) = (+g𝑇)
51, 2, 3, 4isghm 19156 . . 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 3052  wf 6496  cfv 6500  (class class class)co 7368  Basecbs 17148  +gcplusg 17189  Grpcgrp 18875   GrpHom cghm 19153
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 2709  ax-sep 5243  ax-nul 5253  ax-pow 5312  ax-pr 5379  ax-un 7690
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 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-fv 6508  df-ov 7371  df-oprab 7372  df-mpo 7373  df-1st 7943  df-2nd 7944  df-map 8777  df-ghm 19154
This theorem is referenced by:  ghmid  19163  ghminv  19164  ghmsub  19165  ghmmhm  19167  ghmmulg  19169  ghmrn  19170  resghm  19173  ghmpreima  19179  ghmeql  19180  ghmnsgima  19181  ghmnsgpreima  19182  ghmeqker  19184  ghmf1  19187  kerf1ghm  19188  ghmf1o  19189  gimcnv  19208  ghmqusnsglem1  19221  ghmqusnsg  19223  ghmquskerlem1  19224  ghmquskerco  19225  ghmquskerlem3  19227  ghmqusker  19228  lactghmga  19346  frgpup3lem  19718  frgpup3  19719  ghmplusg  19787  isrnghmmul  20390  rnghmf  20396  rhmf  20432  isrhm2d  20434  lmhmf  20998  lmhmpropd  21037  frgpcyg  21540  psgninv  21549  zrhpsgninv  21552  evpmss  21553  psgnevpmb  21554  psgnodpm  21555  zrhpsgnevpm  21558  zrhpsgnodpm  21559  evlslem2  22046  nmoi  24684  nmoix  24685  nmoi2  24686  nmoleub  24687  nmoeq0  24692  nmoco  24693  nmotri  24695  nmods  24700  nghmcn  24701  aks6d1c1p2  42479  aks6d1c1p3  42480  aks6d1c5lem1  42506
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