Theorem rngdir 14085

Description: Distributive law for the multiplication operation of a non-unital ring (right-distributivity). (Contributed by AV, 17-Apr-2020.)

Hypotheses

Ref	Expression
rngdi.b	|- B = ( Base ` R )
rngdi.p	|- .+ = ( +g ` R )
rngdi.t	|- .x. = ( .r ` R )

Assertion

Ref	Expression
rngdir	|- ( ( R e. Rng /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) )

Proof of Theorem rngdir

Dummy variables a b c are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		rngdi.b	. . . 4 |- B = ( Base ` R )
2		eqid 2232	. . . 4 |- (mulGrp ` R ) = (mulGrp ` R )
3		rngdi.p	. . . 4 |- .+ = ( +g ` R )
4		rngdi.t	. . . 4 |- .x. = ( .r ` R )
5	1, 2, 3, 4	isrng 14078	. . 3 |- ( R e. Rng <-> ( R e. Abel /\ (mulGrp ` R ) e. Smgrp /\ A. a e. B A. b e. B A. c e. B ( ( a .x. ( b .+ c ) ) = ( ( a .x. b ) .+ ( a .x. c ) ) /\ ( ( a .+ b ) .x. c ) = ( ( a .x. c ) .+ ( b .x. c ) ) ) ) )
6		oveq1 6057	. . . . . . . 8 |- ( a = X -> ( a .x. ( b .+ c ) ) = ( X .x. ( b .+ c ) ) )
7		oveq1 6057	. . . . . . . . 9 |- ( a = X -> ( a .x. b ) = ( X .x. b ) )
8		oveq1 6057	. . . . . . . . 9 |- ( a = X -> ( a .x. c ) = ( X .x. c ) )
9	7, 8	oveq12d 6068	. . . . . . . 8 |- ( a = X -> ( ( a .x. b ) .+ ( a .x. c ) ) = ( ( X .x. b ) .+ ( X .x. c ) ) )
10	6, 9	eqeq12d 2247	. . . . . . 7 |- ( a = X -> ( ( a .x. ( b .+ c ) ) = ( ( a .x. b ) .+ ( a .x. c ) ) <-> ( X .x. ( b .+ c ) ) = ( ( X .x. b ) .+ ( X .x. c ) ) ) )
11		oveq1 6057	. . . . . . . . 9 |- ( a = X -> ( a .+ b ) = ( X .+ b ) )
12	11	oveq1d 6065	. . . . . . . 8 |- ( a = X -> ( ( a .+ b ) .x. c ) = ( ( X .+ b ) .x. c ) )
13	8	oveq1d 6065	. . . . . . . 8 |- ( a = X -> ( ( a .x. c ) .+ ( b .x. c ) ) = ( ( X .x. c ) .+ ( b .x. c ) ) )
14	12, 13	eqeq12d 2247	. . . . . . 7 |- ( a = X -> ( ( ( a .+ b ) .x. c ) = ( ( a .x. c ) .+ ( b .x. c ) ) <-> ( ( X .+ b ) .x. c ) = ( ( X .x. c ) .+ ( b .x. c ) ) ) )
15	10, 14	anbi12d 473	. . . . . 6 |- ( a = X -> ( ( ( a .x. ( b .+ c ) ) = ( ( a .x. b ) .+ ( a .x. c ) ) /\ ( ( a .+ b ) .x. c ) = ( ( a .x. c ) .+ ( b .x. c ) ) ) <-> ( ( X .x. ( b .+ c ) ) = ( ( X .x. b ) .+ ( X .x. c ) ) /\ ( ( X .+ b ) .x. c ) = ( ( X .x. c ) .+ ( b .x. c ) ) ) ) )
16		oveq1 6057	. . . . . . . . 9 |- ( b = Y -> ( b .+ c ) = ( Y .+ c ) )
17	16	oveq2d 6066	. . . . . . . 8 |- ( b = Y -> ( X .x. ( b .+ c ) ) = ( X .x. ( Y .+ c ) ) )
18		oveq2 6058	. . . . . . . . 9 |- ( b = Y -> ( X .x. b ) = ( X .x. Y ) )
19	18	oveq1d 6065	. . . . . . . 8 |- ( b = Y -> ( ( X .x. b ) .+ ( X .x. c ) ) = ( ( X .x. Y ) .+ ( X .x. c ) ) )
20	17, 19	eqeq12d 2247	. . . . . . 7 |- ( b = Y -> ( ( X .x. ( b .+ c ) ) = ( ( X .x. b ) .+ ( X .x. c ) ) <-> ( X .x. ( Y .+ c ) ) = ( ( X .x. Y ) .+ ( X .x. c ) ) ) )
21		oveq2 6058	. . . . . . . . 9 |- ( b = Y -> ( X .+ b ) = ( X .+ Y ) )
22	21	oveq1d 6065	. . . . . . . 8 |- ( b = Y -> ( ( X .+ b ) .x. c ) = ( ( X .+ Y ) .x. c ) )
23		oveq1 6057	. . . . . . . . 9 |- ( b = Y -> ( b .x. c ) = ( Y .x. c ) )
24	23	oveq2d 6066	. . . . . . . 8 |- ( b = Y -> ( ( X .x. c ) .+ ( b .x. c ) ) = ( ( X .x. c ) .+ ( Y .x. c ) ) )
25	22, 24	eqeq12d 2247	. . . . . . 7 |- ( b = Y -> ( ( ( X .+ b ) .x. c ) = ( ( X .x. c ) .+ ( b .x. c ) ) <-> ( ( X .+ Y ) .x. c ) = ( ( X .x. c ) .+ ( Y .x. c ) ) ) )
26	20, 25	anbi12d 473	. . . . . 6 |- ( b = Y -> ( ( ( X .x. ( b .+ c ) ) = ( ( X .x. b ) .+ ( X .x. c ) ) /\ ( ( X .+ b ) .x. c ) = ( ( X .x. c ) .+ ( b .x. c ) ) ) <-> ( ( X .x. ( Y .+ c ) ) = ( ( X .x. Y ) .+ ( X .x. c ) ) /\ ( ( X .+ Y ) .x. c ) = ( ( X .x. c ) .+ ( Y .x. c ) ) ) ) )
27		oveq2 6058	. . . . . . . . 9 |- ( c = Z -> ( Y .+ c ) = ( Y .+ Z ) )
28	27	oveq2d 6066	. . . . . . . 8 |- ( c = Z -> ( X .x. ( Y .+ c ) ) = ( X .x. ( Y .+ Z ) ) )
29		oveq2 6058	. . . . . . . . 9 |- ( c = Z -> ( X .x. c ) = ( X .x. Z ) )
30	29	oveq2d 6066	. . . . . . . 8 |- ( c = Z -> ( ( X .x. Y ) .+ ( X .x. c ) ) = ( ( X .x. Y ) .+ ( X .x. Z ) ) )
31	28, 30	eqeq12d 2247	. . . . . . 7 |- ( c = Z -> ( ( X .x. ( Y .+ c ) ) = ( ( X .x. Y ) .+ ( X .x. c ) ) <-> ( X .x. ( Y .+ Z ) ) = ( ( X .x. Y ) .+ ( X .x. Z ) ) ) )
32		oveq2 6058	. . . . . . . 8 |- ( c = Z -> ( ( X .+ Y ) .x. c ) = ( ( X .+ Y ) .x. Z ) )
33		oveq2 6058	. . . . . . . . 9 |- ( c = Z -> ( Y .x. c ) = ( Y .x. Z ) )
34	29, 33	oveq12d 6068	. . . . . . . 8 |- ( c = Z -> ( ( X .x. c ) .+ ( Y .x. c ) ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) )
35	32, 34	eqeq12d 2247	. . . . . . 7 |- ( c = Z -> ( ( ( X .+ Y ) .x. c ) = ( ( X .x. c ) .+ ( Y .x. c ) ) <-> ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) ) )
36	31, 35	anbi12d 473	. . . . . 6 |- ( c = Z -> ( ( ( X .x. ( Y .+ c ) ) = ( ( X .x. Y ) .+ ( X .x. c ) ) /\ ( ( X .+ Y ) .x. c ) = ( ( X .x. c ) .+ ( Y .x. c ) ) ) <-> ( ( X .x. ( Y .+ Z ) ) = ( ( X .x. Y ) .+ ( X .x. Z ) ) /\ ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) ) ) )
37	15, 26, 36	rspc3v 2937	. . . . 5 |- ( ( X e. B /\ Y e. B /\ Z e. B ) -> ( A. a e. B A. b e. B A. c e. B ( ( a .x. ( b .+ c ) ) = ( ( a .x. b ) .+ ( a .x. c ) ) /\ ( ( a .+ b ) .x. c ) = ( ( a .x. c ) .+ ( b .x. c ) ) ) -> ( ( X .x. ( Y .+ Z ) ) = ( ( X .x. Y ) .+ ( X .x. Z ) ) /\ ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) ) ) )
38		simpr 110	. . . . 5 |- ( ( ( X .x. ( Y .+ Z ) ) = ( ( X .x. Y ) .+ ( X .x. Z ) ) /\ ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) ) -> ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) )
39	37, 38	syl6com 35	. . . 4 |- ( A. a e. B A. b e. B A. c e. B ( ( a .x. ( b .+ c ) ) = ( ( a .x. b ) .+ ( a .x. c ) ) /\ ( ( a .+ b ) .x. c ) = ( ( a .x. c ) .+ ( b .x. c ) ) ) -> ( ( X e. B /\ Y e. B /\ Z e. B ) -> ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) ) )
40	39	3ad2ant3 1047	. . 3 |- ( ( R e. Abel /\ (mulGrp ` R ) e. Smgrp /\ A. a e. B A. b e. B A. c e. B ( ( a .x. ( b .+ c ) ) = ( ( a .x. b ) .+ ( a .x. c ) ) /\ ( ( a .+ b ) .x. c ) = ( ( a .x. c ) .+ ( b .x. c ) ) ) ) -> ( ( X e. B /\ Y e. B /\ Z e. B ) -> ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) ) )
41	5, 40	sylbi 121	. 2 |- ( R e. Rng -> ( ( X e. B /\ Y e. B /\ Z e. B ) -> ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) ) )
42	41	imp 124	1 |- ( ( R e. Rng /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( X .+ Y ) .x. Z ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1005   = wceq 1398   e. wcel 2203   A.wral 2520   ` cfv 5352  (class class class)co 6050   Basecbs 13212   +g cplusg 13290   .rcmulr 13291  Smgrpcsgrp 13614   Abelcabl 14002  mulGrpcmgp 14064  Rngcrng 14076

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-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-cnex 8218  ax-resscn 8219  ax-1re 8221  ax-addrcl 8224

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-rab 2529  df-v 2815  df-sbc 3043  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-iota 5312  df-fun 5354  df-fn 5355  df-fv 5360  df-ov 6053  df-inn 9238  df-2 9296  df-3 9297  df-ndx 13215  df-slot 13216  df-base 13218  df-plusg 13303  df-mulr 13304  df-rng 14077

This theorem is referenced by:  rnglz  14089  rngmneg1  14091  rngsubdir  14096  rngressid  14098  imasrng  14100  opprrng  14221  issubrng2  14355  rnglidlrng  14646