fprodfvdvdsd - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > fprodfvdvdsd		Structured version Visualization version GIF version

Theorem fprodfvdvdsd 16282

Description: A finite product of integers is divisible by any of its factors being function values. (Contributed by AV, 1-Aug-2021.)

**Hypotheses**
Ref	Expression
fprodfvdvdsd.a	⊢ (𝜑 → 𝐴 ∈ Fin)
fprodfvdvdsd.b	⊢ (𝜑 → 𝐴 ⊆ 𝐵)
fprodfvdvdsd.f	⊢ (𝜑 → 𝐹:𝐵⟶ℤ)

**Assertion**
Ref	Expression
fprodfvdvdsd	⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (𝐹‘𝑘))

Distinct variable groups: 𝐴,𝑘 𝑘,𝐹 𝜑,𝑘,𝑥 Allowed substitution hints: 𝐴(𝑥) 𝐵(𝑥,𝑘) 𝐹(𝑥)

**Proof of Theorem fprodfvdvdsd**
Step	Hyp	Ref	Expression
1		fprodfvdvdsd.a	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ Fin)
2	1	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐴 ∈ Fin)
3		diffi 9182	. . . . . 6 ⊢ (𝐴 ∈ Fin → (𝐴 ∖ {𝑥}) ∈ Fin)
4	2, 3	syl 17	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐴 ∖ {𝑥}) ∈ Fin)
5		fprodfvdvdsd.f	. . . . . . . 8 ⊢ (𝜑 → 𝐹:𝐵⟶ℤ)
6	5	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ {𝑥})) → 𝐹:𝐵⟶ℤ)
7		fprodfvdvdsd.b	. . . . . . . . 9 ⊢ (𝜑 → 𝐴 ⊆ 𝐵)
8	7	ssdifssd 4143	. . . . . . . 8 ⊢ (𝜑 → (𝐴 ∖ {𝑥}) ⊆ 𝐵)
9	8	sselda 3983	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ {𝑥})) → 𝑘 ∈ 𝐵)
10	6, 9	ffvelcdmd 7088	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ {𝑥})) → (𝐹‘𝑘) ∈ ℤ)
11	10	adantlr 712	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ (𝐴 ∖ {𝑥})) → (𝐹‘𝑘) ∈ ℤ)
12	4, 11	fprodzcl 15903	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) ∈ ℤ)
13	5	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐹:𝐵⟶ℤ)
14	7	sselda 3983	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐵)
15	13, 14	ffvelcdmd 7088	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℤ)
16		dvdsmul2 16227	. . . 4 ⊢ ((∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) ∈ ℤ ∧ (𝐹‘𝑥) ∈ ℤ) → (𝐹‘𝑥) ∥ (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥)))
17	12, 15, 16	syl2anc 583	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∥ (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥)))
18	17	ralrimiva 3145	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∥ (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥)))
19		neldifsnd 4797	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ¬ 𝑥 ∈ (𝐴 ∖ {𝑥}))
20		disjsn 4716	. . . . . . 7 ⊢ (((𝐴 ∖ {𝑥}) ∩ {𝑥}) = ∅ ↔ ¬ 𝑥 ∈ (𝐴 ∖ {𝑥}))
21	19, 20	sylibr 233	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((𝐴 ∖ {𝑥}) ∩ {𝑥}) = ∅)
22		difsnid 4814	. . . . . . . 8 ⊢ (𝑥 ∈ 𝐴 → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = 𝐴)
23	22	eqcomd 2737	. . . . . . 7 ⊢ (𝑥 ∈ 𝐴 → 𝐴 = ((𝐴 ∖ {𝑥}) ∪ {𝑥}))
24	23	adantl 481	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐴 = ((𝐴 ∖ {𝑥}) ∪ {𝑥}))
25	13	adantr 480	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → 𝐹:𝐵⟶ℤ)
26	7	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐴 ⊆ 𝐵)
27	26	sselda 3983	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ 𝐵)
28	25, 27	ffvelcdmd 7088	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → (𝐹‘𝑘) ∈ ℤ)
29	28	zcnd 12672	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → (𝐹‘𝑘) ∈ ℂ)
30	21, 24, 2, 29	fprodsplit 15915	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∏𝑘 ∈ 𝐴 (𝐹‘𝑘) = (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · ∏𝑘 ∈ {𝑥} (𝐹‘𝑘)))
31		simpr 484	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐴)
32	15	zcnd 12672	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ)
33		fveq2 6892	. . . . . . . 8 ⊢ (𝑘 = 𝑥 → (𝐹‘𝑘) = (𝐹‘𝑥))
34	33	prodsn 15911	. . . . . . 7 ⊢ ((𝑥 ∈ 𝐴 ∧ (𝐹‘𝑥) ∈ ℂ) → ∏𝑘 ∈ {𝑥} (𝐹‘𝑘) = (𝐹‘𝑥))
35	31, 32, 34	syl2anc 583	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∏𝑘 ∈ {𝑥} (𝐹‘𝑘) = (𝐹‘𝑥))
36	35	oveq2d 7428	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · ∏𝑘 ∈ {𝑥} (𝐹‘𝑘)) = (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥)))
37	30, 36	eqtrd 2771	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∏𝑘 ∈ 𝐴 (𝐹‘𝑘) = (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥)))
38	37	breq2d 5161	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((𝐹‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (𝐹‘𝑘) ↔ (𝐹‘𝑥) ∥ (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥))))
39	38	ralbidva 3174	. 2 ⊢ (𝜑 → (∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (𝐹‘𝑘) ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∥ (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥))))
40	18, 39	mpbird 256	1 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (𝐹‘𝑘))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2105 ∀wral 3060 ∖ cdif 3946 ∪ cun 3947 ∩ cin 3948 ⊆ wss 3949 ∅c0 4323 {csn 4629 class class class wbr 5149 ⟶wf 6540 ‘cfv 6544 (class class class)co 7412 Fincfn 8942 ℂcc 11111 · cmul 11118 ℤcz 12563 ∏cprod 15854 ∥ cdvds 16202

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7728 ax-inf2 9639 ax-cnex 11169 ax-resscn 11170 ax-1cn 11171 ax-icn 11172 ax-addcl 11173 ax-addrcl 11174 ax-mulcl 11175 ax-mulrcl 11176 ax-mulcom 11177 ax-addass 11178 ax-mulass 11179 ax-distr 11180 ax-i2m1 11181 ax-1ne0 11182 ax-1rid 11183 ax-rnegex 11184 ax-rrecex 11185 ax-cnre 11186 ax-pre-lttri 11187 ax-pre-lttrn 11188 ax-pre-ltadd 11189 ax-pre-mulgt0 11190 ax-pre-sup 11191

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7859 df-1st 7978 df-2nd 7979 df-frecs 8269 df-wrecs 8300 df-recs 8374 df-rdg 8413 df-1o 8469 df-er 8706 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-sup 9440 df-oi 9508 df-card 9937 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11451 df-neg 11452 df-div 11877 df-nn 12218 df-2 12280 df-3 12281 df-n0 12478 df-z 12564 df-uz 12828 df-rp 12980 df-fz 13490 df-fzo 13633 df-seq 13972 df-exp 14033 df-hash 14296 df-cj 15051 df-re 15052 df-im 15053 df-sqrt 15187 df-abs 15188 df-clim 15437 df-prod 15855 df-dvds 16203

This theorem is referenced by: fproddvdsd 16283 aks4d1p9 41260 fmtnodvds 46512

W3C validator