Theorem modqadd1 10391

Description: Addition property of the modulo operation. (Contributed by Jim Kingdon, 22-Oct-2021.)

Hypotheses

Ref	Expression
modqadd1.a	|- ( ph -> A e. QQ )
modqadd1.b	|- ( ph -> B e. QQ )
modqadd1.c	|- ( ph -> C e. QQ )
modqadd1.dq	|- ( ph -> D e. QQ )
modqadd1.dgt0	|- ( ph -> 0 < D )
modqadd1.ab	|- ( ph -> ( A mod D ) = ( B mod D ) )

Assertion

Ref	Expression
modqadd1	|- ( ph -> ( ( A + C ) mod D ) = ( ( B + C ) mod D ) )

Proof of Theorem modqadd1

Step	Hyp	Ref	Expression
1		modqadd1.ab	. 2 |- ( ph -> ( A mod D ) = ( B mod D ) )
2		modqadd1.a	. . . . . . 7 |- ( ph -> A e. QQ )
3		modqadd1.dq	. . . . . . 7 |- ( ph -> D e. QQ )
4		modqadd1.dgt0	. . . . . . 7 |- ( ph -> 0 < D )
5		modqval 10354	. . . . . . 7 |- ( ( A e. QQ /\ D e. QQ /\ 0 < D ) -> ( A mod D ) = ( A - ( D x. ( |_ ` ( A / D ) ) ) ) )
6	2, 3, 4, 5	syl3anc 1249	. . . . . 6 |- ( ph -> ( A mod D ) = ( A - ( D x. ( |_ ` ( A / D ) ) ) ) )
7		modqadd1.b	. . . . . . 7 |- ( ph -> B e. QQ )
8		modqval 10354	. . . . . . 7 |- ( ( B e. QQ /\ D e. QQ /\ 0 < D ) -> ( B mod D ) = ( B - ( D x. ( |_ ` ( B / D ) ) ) ) )
9	7, 3, 4, 8	syl3anc 1249	. . . . . 6 |- ( ph -> ( B mod D ) = ( B - ( D x. ( |_ ` ( B / D ) ) ) ) )
10	6, 9	eqeq12d 2204	. . . . 5 |- ( ph -> ( ( A mod D ) = ( B mod D ) <-> ( A - ( D x. ( |_ ` ( A / D ) ) ) ) = ( B - ( D x. ( |_ ` ( B / D ) ) ) ) ) )
11		oveq1 5902	. . . . 5 |- ( ( A - ( D x. ( |_ ` ( A / D ) ) ) ) = ( B - ( D x. ( |_ ` ( B / D ) ) ) ) -> ( ( A - ( D x. ( |_ ` ( A / D ) ) ) ) + C ) = ( ( B - ( D x. ( |_ ` ( B / D ) ) ) ) + C ) )
12	10, 11	biimtrdi 163	. . . 4 |- ( ph -> ( ( A mod D ) = ( B mod D ) -> ( ( A - ( D x. ( |_ ` ( A / D ) ) ) ) + C ) = ( ( B - ( D x. ( |_ ` ( B / D ) ) ) ) + C ) ) )
13		qcn 9663	. . . . . . 7 |- ( A e. QQ -> A e. CC )
14	2, 13	syl 14	. . . . . 6 |- ( ph -> A e. CC )
15		modqadd1.c	. . . . . . 7 |- ( ph -> C e. QQ )
16		qcn 9663	. . . . . . 7 |- ( C e. QQ -> C e. CC )
17	15, 16	syl 14	. . . . . 6 |- ( ph -> C e. CC )
18		qcn 9663	. . . . . . . 8 |- ( D e. QQ -> D e. CC )
19	3, 18	syl 14	. . . . . . 7 |- ( ph -> D e. CC )
20	4	gt0ne0d 8498	. . . . . . . . . 10 |- ( ph -> D =/= 0 )
21		qdivcl 9672	. . . . . . . . . 10 |- ( ( A e. QQ /\ D e. QQ /\ D =/= 0 ) -> ( A / D ) e. QQ )
22	2, 3, 20, 21	syl3anc 1249	. . . . . . . . 9 |- ( ph -> ( A / D ) e. QQ )
23	22	flqcld 10307	. . . . . . . 8 |- ( ph -> ( |_ ` ( A / D ) ) e. ZZ )
24	23	zcnd 9405	. . . . . . 7 |- ( ph -> ( |_ ` ( A / D ) ) e. CC )
25	19, 24	mulcld 8007	. . . . . 6 |- ( ph -> ( D x. ( |_ ` ( A / D ) ) ) e. CC )
26	14, 17, 25	addsubd 8318	. . . . 5 |- ( ph -> ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) = ( ( A - ( D x. ( |_ ` ( A / D ) ) ) ) + C ) )
27		qcn 9663	. . . . . . 7 |- ( B e. QQ -> B e. CC )
28	7, 27	syl 14	. . . . . 6 |- ( ph -> B e. CC )
29		qdivcl 9672	. . . . . . . . . 10 |- ( ( B e. QQ /\ D e. QQ /\ D =/= 0 ) -> ( B / D ) e. QQ )
30	7, 3, 20, 29	syl3anc 1249	. . . . . . . . 9 |- ( ph -> ( B / D ) e. QQ )
31	30	flqcld 10307	. . . . . . . 8 |- ( ph -> ( |_ ` ( B / D ) ) e. ZZ )
32	31	zcnd 9405	. . . . . . 7 |- ( ph -> ( |_ ` ( B / D ) ) e. CC )
33	19, 32	mulcld 8007	. . . . . 6 |- ( ph -> ( D x. ( |_ ` ( B / D ) ) ) e. CC )
34	28, 17, 33	addsubd 8318	. . . . 5 |- ( ph -> ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) = ( ( B - ( D x. ( |_ ` ( B / D ) ) ) ) + C ) )
35	26, 34	eqeq12d 2204	. . . 4 |- ( ph -> ( ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) = ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) <-> ( ( A - ( D x. ( |_ ` ( A / D ) ) ) ) + C ) = ( ( B - ( D x. ( |_ ` ( B / D ) ) ) ) + C ) ) )
36	12, 35	sylibrd 169	. . 3 |- ( ph -> ( ( A mod D ) = ( B mod D ) -> ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) = ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) ) )
37		oveq1 5902	. . . 4 |- ( ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) = ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) -> ( ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) mod D ) = ( ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) mod D ) )
38		qaddcl 9664	. . . . . . 7 |- ( ( A e. QQ /\ C e. QQ ) -> ( A + C ) e. QQ )
39	2, 15, 38	syl2anc 411	. . . . . 6 |- ( ph -> ( A + C ) e. QQ )
40		modqcyc2 10390	. . . . . 6 |- ( ( ( ( A + C ) e. QQ /\ ( |_ ` ( A / D ) ) e. ZZ ) /\ ( D e. QQ /\ 0 < D ) ) -> ( ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) mod D ) = ( ( A + C ) mod D ) )
41	39, 23, 3, 4, 40	syl22anc 1250	. . . . 5 |- ( ph -> ( ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) mod D ) = ( ( A + C ) mod D ) )
42		qaddcl 9664	. . . . . . 7 |- ( ( B e. QQ /\ C e. QQ ) -> ( B + C ) e. QQ )
43	7, 15, 42	syl2anc 411	. . . . . 6 |- ( ph -> ( B + C ) e. QQ )
44		modqcyc2 10390	. . . . . 6 |- ( ( ( ( B + C ) e. QQ /\ ( |_ ` ( B / D ) ) e. ZZ ) /\ ( D e. QQ /\ 0 < D ) ) -> ( ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) mod D ) = ( ( B + C ) mod D ) )
45	43, 31, 3, 4, 44	syl22anc 1250	. . . . 5 |- ( ph -> ( ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) mod D ) = ( ( B + C ) mod D ) )
46	41, 45	eqeq12d 2204	. . . 4 |- ( ph -> ( ( ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) mod D ) = ( ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) mod D ) <-> ( ( A + C ) mod D ) = ( ( B + C ) mod D ) ) )
47	37, 46	imbitrid 154	. . 3 |- ( ph -> ( ( ( A + C ) - ( D x. ( |_ ` ( A / D ) ) ) ) = ( ( B + C ) - ( D x. ( |_ ` ( B / D ) ) ) ) -> ( ( A + C ) mod D ) = ( ( B + C ) mod D ) ) )
48	36, 47	syld 45	. 2 |- ( ph -> ( ( A mod D ) = ( B mod D ) -> ( ( A + C ) mod D ) = ( ( B + C ) mod D ) ) )
49	1, 48	mpd 13	1 |- ( ph -> ( ( A + C ) mod D ) = ( ( B + C ) mod D ) )

Syntax hints:   -> wi 4   = wceq 1364   e. wcel 2160   =/= wne 2360   class class class wbr 4018   ` cfv 5235  (class class class)co 5895   CCcc 7838   0cc0 7840   + caddc 7843   x. cmul 7845   < clt 8021   - cmin 8157   / cdiv 8658   ZZcz 9282   QQcq 9648   |_cfl 10298   mod cmo 10352

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 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2162  ax-14 2163  ax-ext 2171  ax-sep 4136  ax-pow 4192  ax-pr 4227  ax-un 4451  ax-setind 4554  ax-cnex 7931  ax-resscn 7932  ax-1cn 7933  ax-1re 7934  ax-icn 7935  ax-addcl 7936  ax-addrcl 7937  ax-mulcl 7938  ax-mulrcl 7939  ax-addcom 7940  ax-mulcom 7941  ax-addass 7942  ax-mulass 7943  ax-distr 7944  ax-i2m1 7945  ax-0lt1 7946  ax-1rid 7947  ax-0id 7948  ax-rnegex 7949  ax-precex 7950  ax-cnre 7951  ax-pre-ltirr 7952  ax-pre-ltwlin 7953  ax-pre-lttrn 7954  ax-pre-apti 7955  ax-pre-ltadd 7956  ax-pre-mulgt0 7957  ax-pre-mulext 7958  ax-arch 7959

This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2041  df-mo 2042  df-clab 2176  df-cleq 2182  df-clel 2185  df-nfc 2321  df-ne 2361  df-nel 2456  df-ral 2473  df-rex 2474  df-reu 2475  df-rmo 2476  df-rab 2477  df-v 2754  df-sbc 2978  df-csb 3073  df-dif 3146  df-un 3148  df-in 3150  df-ss 3157  df-pw 3592  df-sn 3613  df-pr 3614  df-op 3616  df-uni 3825  df-int 3860  df-iun 3903  df-br 4019  df-opab 4080  df-mpt 4081  df-id 4311  df-po 4314  df-iso 4315  df-xp 4650  df-rel 4651  df-cnv 4652  df-co 4653  df-dm 4654  df-rn 4655  df-res 4656  df-ima 4657  df-iota 5196  df-fun 5237  df-fn 5238  df-f 5239  df-fv 5243  df-riota 5851  df-ov 5898  df-oprab 5899  df-mpo 5900  df-1st 6164  df-2nd 6165  df-pnf 8023  df-mnf 8024  df-xr 8025  df-ltxr 8026  df-le 8027  df-sub 8159  df-neg 8160  df-reap 8561  df-ap 8568  df-div 8659  df-inn 8949  df-n0 9206  df-z 9283  df-q 9649  df-rp 9683  df-fl 10300  df-mod 10353

This theorem is referenced by:  modqaddabs  10392  modqaddmod  10393  modqadd12d  10410  modqaddmulmod  10421  moddvds  11837  lgsvalmod  14873  lgsmod  14880  lgsne0  14892