modqdi - Intuitionistic Logic Explorer

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Theorem modqdi 10761

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 1048	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐴 ∈ ℚ)
2		qcn 9972	. . . . 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 1025	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐵 ∈ ℚ)
5		qcn 9972	. . . . 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 1052	. . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 ∈ ℚ)
8		simp3r 1053	. . . . . . . . . 10 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 0 < 𝐶)
9	8	gt0ne0d 8791	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 ≠ 0)
10		qdivcl 9981	. . . . . . . . 9 ⊢ ((𝐵 ∈ ℚ ∧ 𝐶 ∈ ℚ ∧ 𝐶 ≠ 0) → (𝐵 / 𝐶) ∈ ℚ)
11	4, 7, 9, 10	syl3anc 1274	. . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐵 / 𝐶) ∈ ℚ)
12	11	flqcld 10644	. . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (⌊‘(𝐵 / 𝐶)) ∈ ℤ)
13		zq 9964	. . . . . . 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 9975	. . . . . 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 9972	. . . . 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 8692	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶))))) = ((𝐴 · 𝐵) − (𝐴 · (𝐶 · (⌊‘(𝐵 / 𝐶))))))
20		qcn 9972	. . . . . . . . 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 9963	. . . . . . . . . 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 8908	. . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐶 # 0)
25		qre 9963	. . . . . . . . . 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 1049	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 0 < 𝐴)
28	26, 27	gt0ap0d 8908	. . . . . . . 8 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 𝐴 # 0)
29	6, 21, 3, 24, 28	divcanap5d 9096	. . . . . . 7 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐵) / (𝐴 · 𝐶)) = (𝐵 / 𝐶))
30	29	fveq2d 5676	. . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶))) = (⌊‘(𝐵 / 𝐶)))
31	30	oveq2d 6068	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶)))) = ((𝐴 · 𝐶) · (⌊‘(𝐵 / 𝐶))))
32	12	zcnd 9707	. . . . . 6 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (⌊‘(𝐵 / 𝐶)) ∈ ℂ)
33	3, 21, 32	mulassd 8302	. . . . 5 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → ((𝐴 · 𝐶) · (⌊‘(𝐵 / 𝐶))) = (𝐴 · (𝐶 · (⌊‘(𝐵 / 𝐶)))))
34	31, 33	eqtr2d 2268	. . . 4 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐶 · (⌊‘(𝐵 / 𝐶)))) = ((𝐴 · 𝐶) · (⌊‘((𝐴 · 𝐵) / (𝐴 · 𝐶)))))
35	34	oveq2d 6068	. . 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 2267	. 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 10693	. . . 4 ⊢ ((𝐵 ∈ ℚ ∧ 𝐶 ∈ ℚ ∧ 0 < 𝐶) → (𝐵 mod 𝐶) = (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶)))))
38	4, 7, 8, 37	syl3anc 1274	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐵 mod 𝐶) = (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶)))))
39	38	oveq2d 6068	. 2 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → (𝐴 · (𝐵 mod 𝐶)) = (𝐴 · (𝐵 − (𝐶 · (⌊‘(𝐵 / 𝐶))))))
40		qmulcl 9975	. . . 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 9975	. . . 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 8401	. . 3 ⊢ (((𝐴 ∈ ℚ ∧ 0 < 𝐴) ∧ 𝐵 ∈ ℚ ∧ (𝐶 ∈ ℚ ∧ 0 < 𝐶)) → 0 < (𝐴 · 𝐶))
45		modqval 10693	. . 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 1274	. 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 2277	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 1005 = wceq 1398 ∈ wcel 2205 ≠ wne 2414 class class class wbr 4111 ‘cfv 5354 (class class class)co 6052 ℂcc 8130 ℝcr 8131 0cc0 8132 · cmul 8137 < clt 8313 − cmin 8449 / cdiv 8951 ℤcz 9582 ℚcq 9957 ⌊cfl 10635 mod cmo 10691

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 619 ax-in2 620 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 2207 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 ax-pr 4324 ax-un 4556 ax-setind 4661 ax-cnex 8223 ax-resscn 8224 ax-1cn 8225 ax-1re 8226 ax-icn 8227 ax-addcl 8228 ax-addrcl 8229 ax-mulcl 8230 ax-mulrcl 8231 ax-addcom 8232 ax-mulcom 8233 ax-addass 8234 ax-mulass 8235 ax-distr 8236 ax-i2m1 8237 ax-0lt1 8238 ax-1rid 8239 ax-0id 8240 ax-rnegex 8241 ax-precex 8242 ax-cnre 8243 ax-pre-ltirr 8244 ax-pre-ltwlin 8245 ax-pre-lttrn 8246 ax-pre-apti 8247 ax-pre-ltadd 8248 ax-pre-mulgt0 8249 ax-pre-mulext 8250 ax-arch 8251

This theorem depends on definitions: df-bi 117 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rmo 2530 df-rab 2531 df-v 2817 df-sbc 3045 df-csb 3141 df-dif 3215 df-un 3217 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-int 3952 df-iun 3995 df-br 4112 df-opab 4174 df-mpt 4175 df-id 4416 df-po 4419 df-iso 4420 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-rn 4762 df-res 4763 df-ima 4764 df-iota 5314 df-fun 5356 df-fn 5357 df-f 5358 df-fv 5362 df-riota 6005 df-ov 6055 df-oprab 6056 df-mpo 6057 df-1st 6336 df-2nd 6337 df-pnf 8315 df-mnf 8316 df-xr 8317 df-ltxr 8318 df-le 8319 df-sub 8451 df-neg 8452 df-reap 8854 df-ap 8861 df-div 8952 df-inn 9243 df-n0 9502 df-z 9583 df-q 9958 df-rp 9993 df-fl 10637 df-mod 10692

This theorem is referenced by: (None)

W3C validator