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| Mirrors > Home > MPE Home > Th. List > absproddvds | Structured version Visualization version GIF version | ||
| Description: The absolute value of the product of the elements of a finite subset of the integers is divisible by each element of this subset. (Contributed by AV, 21-Aug-2020.) |
| Ref | Expression |
|---|---|
| absproddvds.s | ⊢ (𝜑 → 𝑍 ⊆ ℤ) |
| absproddvds.f | ⊢ (𝜑 → 𝑍 ∈ Fin) |
| absproddvds.p | ⊢ 𝑃 = (abs‘∏𝑧 ∈ 𝑍 𝑧) |
| Ref | Expression |
|---|---|
| absproddvds | ⊢ (𝜑 → ∀𝑚 ∈ 𝑍 𝑚 ∥ 𝑃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | absproddvds.f | . . . 4 ⊢ (𝜑 → 𝑍 ∈ Fin) | |
| 2 | absproddvds.s | . . . 4 ⊢ (𝜑 → 𝑍 ⊆ ℤ) | |
| 3 | 1, 2 | fproddvdsd 16253 | . . 3 ⊢ (𝜑 → ∀𝑚 ∈ 𝑍 𝑚 ∥ ∏𝑧 ∈ 𝑍 𝑧) |
| 4 | 2 | sselda 3930 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → 𝑚 ∈ ℤ) |
| 5 | 2 | sselda 3930 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → 𝑧 ∈ ℤ) |
| 6 | 1, 5 | fprodzcl 15868 | . . . . . . 7 ⊢ (𝜑 → ∏𝑧 ∈ 𝑍 𝑧 ∈ ℤ) |
| 7 | 6 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → ∏𝑧 ∈ 𝑍 𝑧 ∈ ℤ) |
| 8 | dvdsabsb 16193 | . . . . . 6 ⊢ ((𝑚 ∈ ℤ ∧ ∏𝑧 ∈ 𝑍 𝑧 ∈ ℤ) → (𝑚 ∥ ∏𝑧 ∈ 𝑍 𝑧 ↔ 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧))) | |
| 9 | 4, 7, 8 | syl2anc 584 | . . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝑚 ∥ ∏𝑧 ∈ 𝑍 𝑧 ↔ 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧))) |
| 10 | 9 | biimpd 229 | . . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝑚 ∥ ∏𝑧 ∈ 𝑍 𝑧 → 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧))) |
| 11 | 10 | ralimdva 3145 | . . 3 ⊢ (𝜑 → (∀𝑚 ∈ 𝑍 𝑚 ∥ ∏𝑧 ∈ 𝑍 𝑧 → ∀𝑚 ∈ 𝑍 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧))) |
| 12 | 3, 11 | mpd 15 | . 2 ⊢ (𝜑 → ∀𝑚 ∈ 𝑍 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧)) |
| 13 | absproddvds.p | . . . 4 ⊢ 𝑃 = (abs‘∏𝑧 ∈ 𝑍 𝑧) | |
| 14 | 13 | breq2i 5103 | . . 3 ⊢ (𝑚 ∥ 𝑃 ↔ 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧)) |
| 15 | 14 | ralbii 3079 | . 2 ⊢ (∀𝑚 ∈ 𝑍 𝑚 ∥ 𝑃 ↔ ∀𝑚 ∈ 𝑍 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧)) |
| 16 | 12, 15 | sylibr 234 | 1 ⊢ (𝜑 → ∀𝑚 ∈ 𝑍 𝑚 ∥ 𝑃) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ∀wral 3048 ⊆ wss 3898 class class class wbr 5095 ‘cfv 6489 Fincfn 8879 ℤcz 12479 abscabs 15148 ∏cprod 15817 ∥ cdvds 16170 |
| 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 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7677 ax-inf2 9542 ax-cnex 11073 ax-resscn 11074 ax-1cn 11075 ax-icn 11076 ax-addcl 11077 ax-addrcl 11078 ax-mulcl 11079 ax-mulrcl 11080 ax-mulcom 11081 ax-addass 11082 ax-mulass 11083 ax-distr 11084 ax-i2m1 11085 ax-1ne0 11086 ax-1rid 11087 ax-rnegex 11088 ax-rrecex 11089 ax-cnre 11090 ax-pre-lttri 11091 ax-pre-lttrn 11092 ax-pre-ltadd 11093 ax-pre-mulgt0 11094 ax-pre-sup 11095 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-int 4900 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-se 5575 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-isom 6498 df-riota 7312 df-ov 7358 df-oprab 7359 df-mpo 7360 df-om 7806 df-1st 7930 df-2nd 7931 df-frecs 8220 df-wrecs 8251 df-recs 8300 df-rdg 8338 df-1o 8394 df-er 8631 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-sup 9337 df-oi 9407 df-card 9843 df-pnf 11159 df-mnf 11160 df-xr 11161 df-ltxr 11162 df-le 11163 df-sub 11357 df-neg 11358 df-div 11786 df-nn 12137 df-2 12199 df-3 12200 df-n0 12393 df-z 12480 df-uz 12743 df-rp 12897 df-fz 13415 df-fzo 13562 df-seq 13916 df-exp 13976 df-hash 14245 df-cj 15013 df-re 15014 df-im 15015 df-sqrt 15149 df-abs 15150 df-clim 15402 df-prod 15818 df-dvds 16171 |
| This theorem is referenced by: fissn0dvds 16537 |
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