modqdi - Intuitionistic Logic Explorer

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Theorem modqdi 10501

Description: Distribute multiplication over a modulo operation. (Contributed by Jim Kingdon, 26-Oct-2021.)

**Assertion**
Ref	Expression
modqdi	⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐵 mod 𝐶)) = ((𝐴 · 𝐵) mod (𝐴 · 𝐶)))

**Proof of Theorem modqdi**
Step	Hyp	Ref	Expression
1		simp1l 1023	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐴 ∈ ℚ)
2		qcn 9725	. . . . 5 ⊢ (𝐴 ∈ ℚ → 𝐴 ∈ ℂ)
3	1, 2	syl 14	. . . 4 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐴 ∈ ℂ)
4		simp2 1000	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐵 ∈ ℚ)
5		qcn 9725	. . . . 5 ⊢ (𝐵 ∈ ℚ → 𝐵 ∈ ℂ)
6	4, 5	syl 14	. . . 4 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐵 ∈ ℂ)
7		simp3l 1027	. . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 ∈ ℚ)
8		simp3r 1028	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 0 < 𝐶)
9	8	gt0ne0d 8556	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 ≠ 0)
10		qdivcl 9734	. . . . . . . . 9 ⊢ ((𝐵 ∈ ℚ ∧ 𝐶 ∈ ℚ ∧ 𝐶 ≠ 0) → (𝐵 / 𝐶) ∈ ℚ)
11	4, 7, 9, 10	syl3anc 1249	. . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐵 / 𝐶) ∈ ℚ)
12	11	flqcld 10384	. . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (⌊‘(𝐵 / 𝐶)) ∈ ℤ)
13		zq 9717	. . . . . . 7 ⊢ ((⌊‘(𝐵 / 𝐶)) ∈ ℤ → (⌊‘(𝐵 / 𝐶)) ∈ ℚ)
14	12, 13	syl 14	. . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (⌊‘(𝐵 / 𝐶)) ∈ ℚ)
15		qmulcl 9728	. . . . . 6 ⊢ ((𝐶 ∈ ℚ ∧ (⌊‘(𝐵 / 𝐶)) ∈ ℚ) → (𝐶 · (⌊‘(𝐵 / 𝐶))) ∈ ℚ)
16	7, 14, 15	syl2anc 411	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐶 · (⌊‘(𝐵 / 𝐶))) ∈ ℚ)
17		qcn 9725	. . . . 5 ⊢ ((𝐶 · (⌊‘(𝐵 / 𝐶))) ∈ ℚ → (𝐶 · (⌊‘(𝐵 / 𝐶))) ∈ ℂ)
18	16, 17	syl 14	. . . 4 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐶 · (⌊‘(𝐵 / 𝐶))) ∈ ℂ)
19	3, 6, 18	subdid 8457	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶))))) = ((𝐴 · 𝐵) − (𝐴 · (𝐶 · (⌊‘(𝐵 / 𝐶))))))
20		qcn 9725	. . . . . . . . 9 ⊢ (𝐶 ∈ ℚ → 𝐶 ∈ ℂ)
21	7, 20	syl 14	. . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 ∈ ℂ)
22		qre 9716	. . . . . . . . . 10 ⊢ (𝐶 ∈ ℚ → 𝐶 ∈ ℝ)
23	7, 22	syl 14	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 ∈ ℝ)
24	23, 8	gt0ap0d 8673	. . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 # 0)
25		qre 9716	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℚ → 𝐴 ∈ ℝ)
26	1, 25	syl 14	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐴 ∈ ℝ)
27		simp1r 1024	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 0 < 𝐴)
28	26, 27	gt0ap0d 8673	. . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐴 # 0)
29	6, 21, 3, 24, 28	divcanap5d 8861	. . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐵) / (𝐴 · 𝐶)) = (𝐵 / 𝐶))
30	29	fveq2d 5565	. . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶))) = (⌊‘(𝐵 / 𝐶)))
31	30	oveq2d 5941	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶)))) = ((𝐴 · 𝐶) · (⌊‘(𝐵 / 𝐶))))
32	12	zcnd 9466	. . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (⌊‘(𝐵 / 𝐶)) ∈ ℂ)
33	3, 21, 32	mulassd 8067	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) · (⌊‘(𝐵 / 𝐶))) = (𝐴 · (𝐶 · (⌊‘(𝐵 / 𝐶)))))
34	31, 33	eqtr2d 2230	. . . 4 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐶 · (⌊‘(𝐵 / 𝐶)))) = ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶)))))
35	34	oveq2d 5941	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐵) − (𝐴 · (𝐶 · (⌊‘(𝐵 / 𝐶))))) = ((𝐴 · 𝐵) − ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶))))))
36	19, 35	eqtrd 2229	. 2 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶))))) = ((𝐴 · 𝐵) − ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶))))))
37		modqval 10433	. . . 4 ⊢ ((𝐵 ∈ ℚ ∧ 𝐶 ∈ ℚ ∧ 0 < 𝐶) → (𝐵 mod 𝐶) = (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶)))))
38	4, 7, 8, 37	syl3anc 1249	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐵 mod 𝐶) = (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶)))))
39	38	oveq2d 5941	. 2 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐵 mod 𝐶)) = (𝐴 · (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶))))))
40		qmulcl 9728	. . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝐵 ∈ ℚ) → (𝐴 · 𝐵) ∈ ℚ)
41	1, 4, 40	syl2anc 411	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · 𝐵) ∈ ℚ)
42		qmulcl 9728	. . . 4 ⊢ ((𝐴 ∈ ℚ ∧ 𝐶 ∈ ℚ) → (𝐴 · 𝐶) ∈ ℚ)
43	1, 7, 42	syl2anc 411	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · 𝐶) ∈ ℚ)
44	26, 23, 27, 8	mulgt0d 8166	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 0 < (𝐴 · 𝐶))
45		modqval 10433	. . 3 ⊢ (((𝐴 · 𝐵) ∈ ℚ ∧ (𝐴 · 𝐶) ∈ ℚ ∧ 0 < (𝐴 · 𝐶)) → ((𝐴 · 𝐵) mod (𝐴 · 𝐶)) = ((𝐴 · 𝐵) − ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶))))))
46	41, 43, 44, 45	syl3anc 1249	. 2 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐵) mod (𝐴 · 𝐶)) = ((𝐴 · 𝐵) − ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶))))))
47	36, 39, 46	3eqtr4d 2239	1 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐵 mod 𝐶)) = ((𝐴 · 𝐵) mod (𝐴 · 𝐶)))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 980 = wceq 1364 ∈ wcel 2167 ≠ wne 2367 class class class wbr 4034 ‘cfv 5259 (class class class)co 5925 ℂcc 7894 ℝcr 7895 0cc0 7896 · cmul 7901 < clt 8078 − cmin 8214 / cdiv 8716 ℤcz 9343 ℚcq 9710 ⌊cfl 10375 mod cmo 10431

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 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-cnex 7987 ax-resscn 7988 ax-1cn 7989 ax-1re 7990 ax-icn 7991 ax-addcl 7992 ax-addrcl 7993 ax-mulcl 7994 ax-mulrcl 7995 ax-addcom 7996 ax-mulcom 7997 ax-addass 7998 ax-mulass 7999 ax-distr 8000 ax-i2m1 8001 ax-0lt1 8002 ax-1rid 8003 ax-0id 8004 ax-rnegex 8005 ax-precex 8006 ax-cnre 8007 ax-pre-ltirr 8008 ax-pre-ltwlin 8009 ax-pre-lttrn 8010 ax-pre-apti 8011 ax-pre-ltadd 8012 ax-pre-mulgt0 8013 ax-pre-mulext 8014 ax-arch 8015

This theorem depends on definitions: df-bi 117 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-reu 2482 df-rmo 2483 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-int 3876 df-iun 3919 df-br 4035 df-opab 4096 df-mpt 4097 df-id 4329 df-po 4332 df-iso 4333 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-rn 4675 df-res 4676 df-ima 4677 df-iota 5220 df-fun 5261 df-fn 5262 df-f 5263 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-1st 6207 df-2nd 6208 df-pnf 8080 df-mnf 8081 df-xr 8082 df-ltxr 8083 df-le 8084 df-sub 8216 df-neg 8217 df-reap 8619 df-ap 8626 df-div 8717 df-inn 9008 df-n0 9267 df-z 9344 df-q 9711 df-rp 9746 df-fl 10377 df-mod 10432

This theorem is referenced by: (None)

W3C validator