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Mirrors > Home > MPE Home > Th. List > fprodfvdvdsd | Structured version Visualization version GIF version |
Description: A finite product of integers is divisible by any of its factors being function values. (Contributed by AV, 1-Aug-2021.) |
Ref | Expression |
---|---|
fprodfvdvdsd.a | ⊢ (𝜑 → 𝐴 ∈ Fin) |
fprodfvdvdsd.b | ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
fprodfvdvdsd.f | ⊢ (𝜑 → 𝐹:𝐵⟶ℤ) |
Ref | Expression |
---|---|
fprodfvdvdsd | ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (𝐹‘𝑘)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fprodfvdvdsd.a | . . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
2 | 1 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐴 ∈ Fin) |
3 | diffi 8979 | . . . . . 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 4073 | . . . . . . . 8 ⊢ (𝜑 → (𝐴 ∖ {𝑥}) ⊆ 𝐵) |
9 | 8 | sselda 3917 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ {𝑥})) → 𝑘 ∈ 𝐵) |
10 | 6, 9 | ffvelrnd 6944 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ {𝑥})) → (𝐹‘𝑘) ∈ ℤ) |
11 | 10 | adantlr 711 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ (𝐴 ∖ {𝑥})) → (𝐹‘𝑘) ∈ ℤ) |
12 | 4, 11 | fprodzcl 15592 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) ∈ ℤ) |
13 | 5 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐹:𝐵⟶ℤ) |
14 | 7 | sselda 3917 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐵) |
15 | 13, 14 | ffvelrnd 6944 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℤ) |
16 | dvdsmul2 15916 | . . . 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 3107 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) ∥ (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥))) |
19 | neldifsnd 4723 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ¬ 𝑥 ∈ (𝐴 ∖ {𝑥})) | |
20 | disjsn 4644 | . . . . . . 7 ⊢ (((𝐴 ∖ {𝑥}) ∩ {𝑥}) = ∅ ↔ ¬ 𝑥 ∈ (𝐴 ∖ {𝑥})) | |
21 | 19, 20 | sylibr 233 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((𝐴 ∖ {𝑥}) ∩ {𝑥}) = ∅) |
22 | difsnid 4740 | . . . . . . . 8 ⊢ (𝑥 ∈ 𝐴 → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = 𝐴) | |
23 | 22 | eqcomd 2744 | . . . . . . 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 3917 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ 𝐵) |
28 | 25, 27 | ffvelrnd 6944 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → (𝐹‘𝑘) ∈ ℤ) |
29 | 28 | zcnd 12356 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → (𝐹‘𝑘) ∈ ℂ) |
30 | 21, 24, 2, 29 | fprodsplit 15604 | . . . . 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 12356 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) ∈ ℂ) |
33 | fveq2 6756 | . . . . . . . 8 ⊢ (𝑘 = 𝑥 → (𝐹‘𝑘) = (𝐹‘𝑥)) | |
34 | 33 | prodsn 15600 | . . . . . . 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 7271 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · ∏𝑘 ∈ {𝑥} (𝐹‘𝑘)) = (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥))) |
37 | 30, 36 | eqtrd 2778 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∏𝑘 ∈ 𝐴 (𝐹‘𝑘) = (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥))) |
38 | 37 | breq2d 5082 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((𝐹‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (𝐹‘𝑘) ↔ (𝐹‘𝑥) ∥ (∏𝑘 ∈ (𝐴 ∖ {𝑥})(𝐹‘𝑘) · (𝐹‘𝑥)))) |
39 | 38 | ralbidva 3119 | . 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 1539 ∈ wcel 2108 ∀wral 3063 ∖ cdif 3880 ∪ cun 3881 ∩ cin 3882 ⊆ wss 3883 ∅c0 4253 {csn 4558 class class class wbr 5070 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 Fincfn 8691 ℂcc 10800 · cmul 10807 ℤcz 12249 ∏cprod 15543 ∥ cdvds 15891 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-fz 13169 df-fzo 13312 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-clim 15125 df-prod 15544 df-dvds 15892 |
This theorem is referenced by: fproddvdsd 15972 aks4d1p9 40024 fmtnodvds 44884 |
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