Theorem rngdir 13953

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 2231	. . . 4 |- (mulGrp ` R ) = (mulGrp ` R )
3		rngdi.p	. . . 4 |- .+ = ( +g ` R )
4		rngdi.t	. . . 4 |- .x. = ( .r ` R )
5	1, 2, 3, 4	isrng 13946	. . 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 6024	. . . . . . . 8 |- ( a = X -> ( a .x. ( b .+ c ) ) = ( X .x. ( b .+ c ) ) )
7		oveq1 6024	. . . . . . . . 9 |- ( a = X -> ( a .x. b ) = ( X .x. b ) )
8		oveq1 6024	. . . . . . . . 9 |- ( a = X -> ( a .x. c ) = ( X .x. c ) )
9	7, 8	oveq12d 6035	. . . . . . . 8 |- ( a = X -> ( ( a .x. b ) .+ ( a .x. c ) ) = ( ( X .x. b ) .+ ( X .x. c ) ) )
10	6, 9	eqeq12d 2246	. . . . . . 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 6024	. . . . . . . . 9 |- ( a = X -> ( a .+ b ) = ( X .+ b ) )
12	11	oveq1d 6032	. . . . . . . 8 |- ( a = X -> ( ( a .+ b ) .x. c ) = ( ( X .+ b ) .x. c ) )
13	8	oveq1d 6032	. . . . . . . 8 |- ( a = X -> ( ( a .x. c ) .+ ( b .x. c ) ) = ( ( X .x. c ) .+ ( b .x. c ) ) )
14	12, 13	eqeq12d 2246	. . . . . . 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 6024	. . . . . . . . 9 |- ( b = Y -> ( b .+ c ) = ( Y .+ c ) )
17	16	oveq2d 6033	. . . . . . . 8 |- ( b = Y -> ( X .x. ( b .+ c ) ) = ( X .x. ( Y .+ c ) ) )
18		oveq2 6025	. . . . . . . . 9 |- ( b = Y -> ( X .x. b ) = ( X .x. Y ) )
19	18	oveq1d 6032	. . . . . . . 8 |- ( b = Y -> ( ( X .x. b ) .+ ( X .x. c ) ) = ( ( X .x. Y ) .+ ( X .x. c ) ) )
20	17, 19	eqeq12d 2246	. . . . . . 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 6025	. . . . . . . . 9 |- ( b = Y -> ( X .+ b ) = ( X .+ Y ) )
22	21	oveq1d 6032	. . . . . . . 8 |- ( b = Y -> ( ( X .+ b ) .x. c ) = ( ( X .+ Y ) .x. c ) )
23		oveq1 6024	. . . . . . . . 9 |- ( b = Y -> ( b .x. c ) = ( Y .x. c ) )
24	23	oveq2d 6033	. . . . . . . 8 |- ( b = Y -> ( ( X .x. c ) .+ ( b .x. c ) ) = ( ( X .x. c ) .+ ( Y .x. c ) ) )
25	22, 24	eqeq12d 2246	. . . . . . 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 6025	. . . . . . . . 9 |- ( c = Z -> ( Y .+ c ) = ( Y .+ Z ) )
28	27	oveq2d 6033	. . . . . . . 8 |- ( c = Z -> ( X .x. ( Y .+ c ) ) = ( X .x. ( Y .+ Z ) ) )
29		oveq2 6025	. . . . . . . . 9 |- ( c = Z -> ( X .x. c ) = ( X .x. Z ) )
30	29	oveq2d 6033	. . . . . . . 8 |- ( c = Z -> ( ( X .x. Y ) .+ ( X .x. c ) ) = ( ( X .x. Y ) .+ ( X .x. Z ) ) )
31	28, 30	eqeq12d 2246	. . . . . . 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 6025	. . . . . . . 8 |- ( c = Z -> ( ( X .+ Y ) .x. c ) = ( ( X .+ Y ) .x. Z ) )
33		oveq2 6025	. . . . . . . . 9 |- ( c = Z -> ( Y .x. c ) = ( Y .x. Z ) )
34	29, 33	oveq12d 6035	. . . . . . . 8 |- ( c = Z -> ( ( X .x. c ) .+ ( Y .x. c ) ) = ( ( X .x. Z ) .+ ( Y .x. Z ) ) )
35	32, 34	eqeq12d 2246	. . . . . . 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 2926	. . . . 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 1046	. . 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 1004   = wceq 1397   e. wcel 2202   A.wral 2510   ` cfv 5326  (class class class)co 6017   Basecbs 13081   +g cplusg 13159   .rcmulr 13160  Smgrpcsgrp 13483   Abelcabl 13871  mulGrpcmgp 13932  Rngcrng 13944

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-cnex 8122  ax-resscn 8123  ax-1re 8125  ax-addrcl 8128

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-ov 6020  df-inn 9143  df-2 9201  df-3 9202  df-ndx 13084  df-slot 13085  df-base 13087  df-plusg 13172  df-mulr 13173  df-rng 13945

This theorem is referenced by:  rnglz  13957  rngmneg1  13959  rngsubdir  13964  rngressid  13966  imasrng  13968  opprrng  14089  issubrng2  14223  rnglidlrng  14511