Theorem ghmfghm 18236

Description: The function fulfilling the conditions of ghmgrp 17539 is a group homomorphism. (Contributed by Thierry Arnoux, 26-Jan-2020.)

Hypotheses

Ref	Expression
ghmabl.x	|- X = ( Base ` G )
ghmabl.y	|- Y = ( Base ` H )
ghmabl.p	|- .+ = ( +g ` G )
ghmabl.q	|- .+^ = ( +g ` H )
ghmabl.f	|- ( ( ph /\ x e. X /\ y e. X ) -> ( F ` ( x .+ y ) ) = ( ( F ` x ) .+^ ( F ` y ) ) )
ghmabl.1	|- ( ph -> F : X -onto-> Y )
ghmfghm.3	|- ( ph -> G e. Grp )

Assertion

Ref	Expression
ghmfghm	|- ( ph -> F e. ( G GrpHom H ) )

Distinct variable groups:   x, .+ , y   x, .+^ , y   x, F, y   x, G, y   x, H, y   x, X, y   x, Y, y   ph, x, y

Proof of Theorem ghmfghm

Step	Hyp	Ref	Expression
1		ghmabl.x	. 2 |- X = ( Base ` G )
2		ghmabl.y	. 2 |- Y = ( Base ` H )
3		ghmabl.p	. 2 |- .+ = ( +g ` G )
4		ghmabl.q	. 2 |- .+^ = ( +g ` H )
5		ghmfghm.3	. 2 |- ( ph -> G e. Grp )
6		ghmabl.f	. . 3 |- ( ( ph /\ x e. X /\ y e. X ) -> ( F ` ( x .+ y ) ) = ( ( F ` x ) .+^ ( F ` y ) ) )
7		ghmabl.1	. . 3 |- ( ph -> F : X -onto-> Y )
8	6, 1, 2, 3, 4, 7, 5	ghmgrp 17539	. 2 |- ( ph -> H e. Grp )
9		fof 6115	. . 3 |- ( F : X -onto-> Y -> F : X --> Y )
10	7, 9	syl 17	. 2 |- ( ph -> F : X --> Y )
11	6	3expb 1266	. 2 |- ( ( ph /\ ( x e. X /\ y e. X ) ) -> ( F ` ( x .+ y ) ) = ( ( F ` x ) .+^ ( F ` y ) ) )
12	1, 2, 3, 4, 5, 8, 10, 11	isghmd 17669	1 |- ( ph -> F e. ( G GrpHom H ) )

Syntax hints:   -> wi 4   /\ w3a 1037   = wceq 1483   e. wcel 1990   -->wf 5884   -onto->wfo 5886   ` cfv 5888  (class class class)co 6650   Basecbs 15857   +g cplusg 15941   Grpcgrp 17422   GrpHom cghm 17657

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-0g 16102  df-mgm 17242  df-sgrp 17284  df-mnd 17295  df-grp 17425  df-minusg 17426  df-ghm 17658

This theorem is referenced by: (None)