Theorem ringrghm 14350

Description: Right-multiplication in a ring by a fixed element of the ring is a group homomorphism. (It is not usually a ring homomorphism.) (Contributed by Mario Carneiro, 4-May-2015.)

Hypotheses

Ref	Expression
ringlghm.b	|- B = ( Base ` R )
ringlghm.t	|- .x. = ( .r ` R )

Assertion

Ref	Expression
ringrghm	|- ( ( R e. Ring /\ X e. B ) -> ( x e. B |-> ( x .x. X ) ) e. ( R GrpHom R ) )

Distinct variable groups:   x, B   x, R   x, .x.   x, X

Proof of Theorem ringrghm

Dummy variables y z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ringlghm.b	. 2 |- B = ( Base ` R )
2		eqid 2238	. 2 |- ( +g ` R ) = ( +g ` R )
3		ringgrp 14288	. . 3 |- ( R e. Ring -> R e. Grp )
4	3	adantr 276	. 2 |- ( ( R e. Ring /\ X e. B ) -> R e. Grp )
5		ringlghm.t	. . . . . 6 |- .x. = ( .r ` R )
6	1, 5	ringcl 14300	. . . . 5 |- ( ( R e. Ring /\ x e. B /\ X e. B ) -> ( x .x. X ) e. B )
7	6	3expa 1234	. . . 4 |- ( ( ( R e. Ring /\ x e. B ) /\ X e. B ) -> ( x .x. X ) e. B )
8	7	an32s 574	. . 3 |- ( ( ( R e. Ring /\ X e. B ) /\ x e. B ) -> ( x .x. X ) e. B )
9	8	fmpttd 5857	. 2 |- ( ( R e. Ring /\ X e. B ) -> ( x e. B |-> ( x .x. X ) ) : B --> B )
10		df-3an 1011	. . . . 5 |- ( ( y e. B /\ z e. B /\ X e. B ) <-> ( ( y e. B /\ z e. B ) /\ X e. B ) )
11	1, 2, 5	ringdir 14307	. . . . 5 |- ( ( R e. Ring /\ ( y e. B /\ z e. B /\ X e. B ) ) -> ( ( y ( +g ` R ) z ) .x. X ) = ( ( y .x. X ) ( +g ` R ) ( z .x. X ) ) )
12	10, 11	sylan2br 288	. . . 4 |- ( ( R e. Ring /\ ( ( y e. B /\ z e. B ) /\ X e. B ) ) -> ( ( y ( +g ` R ) z ) .x. X ) = ( ( y .x. X ) ( +g ` R ) ( z .x. X ) ) )
13	12	anass1rs 577	. . 3 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( ( y ( +g ` R ) z ) .x. X ) = ( ( y .x. X ) ( +g ` R ) ( z .x. X ) ) )
14		eqid 2238	. . . 4 |- ( x e. B |-> ( x .x. X ) ) = ( x e. B |-> ( x .x. X ) )
15		oveq1 6086	. . . 4 |- ( x = ( y ( +g ` R ) z ) -> ( x .x. X ) = ( ( y ( +g ` R ) z ) .x. X ) )
16	1, 2	ringacl 14318	. . . . . 6 |- ( ( R e. Ring /\ y e. B /\ z e. B ) -> ( y ( +g ` R ) z ) e. B )
17	16	3expb 1235	. . . . 5 |- ( ( R e. Ring /\ ( y e. B /\ z e. B ) ) -> ( y ( +g ` R ) z ) e. B )
18	17	adantlr 481	. . . 4 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( y ( +g ` R ) z ) e. B )
19		simpll 531	. . . . 5 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> R e. Ring )
20		simplr 533	. . . . 5 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> X e. B )
21	1, 5	ringcl 14300	. . . . 5 |- ( ( R e. Ring /\ ( y ( +g ` R ) z ) e. B /\ X e. B ) -> ( ( y ( +g ` R ) z ) .x. X ) e. B )
22	19, 18, 20, 21	syl3anc 1278	. . . 4 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( ( y ( +g ` R ) z ) .x. X ) e. B )
23	14, 15, 18, 22	fvmptd3 5796	. . 3 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( ( x e. B |-> ( x .x. X ) ) ` ( y ( +g ` R ) z ) ) = ( ( y ( +g ` R ) z ) .x. X ) )
24		oveq1 6086	. . . . 5 |- ( x = y -> ( x .x. X ) = ( y .x. X ) )
25		simprl 535	. . . . 5 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> y e. B )
26	1, 5	ringcl 14300	. . . . . 6 |- ( ( R e. Ring /\ y e. B /\ X e. B ) -> ( y .x. X ) e. B )
27	19, 25, 20, 26	syl3anc 1278	. . . . 5 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( y .x. X ) e. B )
28	14, 24, 25, 27	fvmptd3 5796	. . . 4 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( ( x e. B |-> ( x .x. X ) ) ` y ) = ( y .x. X ) )
29		oveq1 6086	. . . . 5 |- ( x = z -> ( x .x. X ) = ( z .x. X ) )
30		simprr 537	. . . . 5 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> z e. B )
31	1, 5	ringcl 14300	. . . . . 6 |- ( ( R e. Ring /\ z e. B /\ X e. B ) -> ( z .x. X ) e. B )
32	19, 30, 20, 31	syl3anc 1278	. . . . 5 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( z .x. X ) e. B )
33	14, 29, 30, 32	fvmptd3 5796	. . . 4 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( ( x e. B |-> ( x .x. X ) ) ` z ) = ( z .x. X ) )
34	28, 33	oveq12d 6097	. . 3 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( ( ( x e. B |-> ( x .x. X ) ) ` y ) ( +g ` R ) ( ( x e. B |-> ( x .x. X ) ) ` z ) ) = ( ( y .x. X ) ( +g ` R ) ( z .x. X ) ) )
35	13, 23, 34	3eqtr4d 2281	. 2 |- ( ( ( R e. Ring /\ X e. B ) /\ ( y e. B /\ z e. B ) ) -> ( ( x e. B |-> ( x .x. X ) ) ` ( y ( +g ` R ) z ) ) = ( ( ( x e. B |-> ( x .x. X ) ) ` y ) ( +g ` R ) ( ( x e. B |-> ( x .x. X ) ) ` z ) ) )
36	1, 1, 2, 2, 4, 4, 9, 35	isghmd 14038	1 |- ( ( R e. Ring /\ X e. B ) -> ( x e. B |-> ( x .x. X ) ) e. ( R GrpHom R ) )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1009   = wceq 1402   e. wcel 2209   |-> cmpt 4190   ` cfv 5375  (class class class)co 6079   Basecbs 13335   +g cplusg 13414   .rcmulr 13415   Grpcgrp 13788   GrpHom cghm 14026   Ringcrg 14283

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4244  ax-sep 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682  ax-cnex 8264  ax-resscn 8265  ax-1cn 8266  ax-1re 8267  ax-icn 8268  ax-addcl 8269  ax-addrcl 8270  ax-mulcl 8271  ax-addcom 8273  ax-addass 8275  ax-i2m1 8278  ax-0lt1 8279  ax-0id 8281  ax-rnegex 8282  ax-pre-ltirr 8285  ax-pre-ltadd 8289

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-iun 4012  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-f1 5380  df-fo 5381  df-f1o 5382  df-fv 5383  df-ov 6082  df-oprab 6083  df-mpo 6084  df-pnf 8356  df-mnf 8357  df-ltxr 8359  df-inn 9288  df-2 9346  df-3 9347  df-ndx 13338  df-slot 13339  df-base 13341  df-sets 13342  df-plusg 13427  df-mulr 13428  df-mgm 13659  df-sgrp 13700  df-mnd 13713  df-grp 13791  df-ghm 14027  df-mgp 14201  df-ring 14285

This theorem is referenced by: (None)