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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 16295 | . . 3 ⊢ (𝜑 → ∀𝑚 ∈ 𝑍 𝑚 ∥ ∏𝑧 ∈ 𝑍 𝑧) |
| 4 | 2 | sselda 3922 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → 𝑚 ∈ ℤ) |
| 5 | 2 | sselda 3922 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → 𝑧 ∈ ℤ) |
| 6 | 1, 5 | fprodzcl 15910 | . . . . . . 7 ⊢ (𝜑 → ∏𝑧 ∈ 𝑍 𝑧 ∈ ℤ) |
| 7 | 6 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → ∏𝑧 ∈ 𝑍 𝑧 ∈ ℤ) |
| 8 | dvdsabsb 16235 | . . . . . 6 ⊢ ((𝑚 ∈ ℤ ∧ ∏𝑧 ∈ 𝑍 𝑧 ∈ ℤ) → (𝑚 ∥ ∏𝑧 ∈ 𝑍 𝑧 ↔ 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧))) | |
| 9 | 4, 7, 8 | syl2anc 585 | . . . . 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 3150 | . . 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 5094 | . . 3 ⊢ (𝑚 ∥ 𝑃 ↔ 𝑚 ∥ (abs‘∏𝑧 ∈ 𝑍 𝑧)) |
| 15 | 14 | ralbii 3084 | . 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 1542 ∈ wcel 2114 ∀wral 3052 ⊆ wss 3890 class class class wbr 5086 ‘cfv 6492 Fincfn 8886 ℤcz 12515 abscabs 15187 ∏cprod 15859 ∥ cdvds 16212 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-inf2 9553 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 ax-pre-sup 11107 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-se 5578 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-isom 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-1o 8398 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-fin 8890 df-sup 9348 df-oi 9418 df-card 9854 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12166 df-2 12235 df-3 12236 df-n0 12429 df-z 12516 df-uz 12780 df-rp 12934 df-fz 13453 df-fzo 13600 df-seq 13955 df-exp 14015 df-hash 14284 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-clim 15441 df-prod 15860 df-dvds 16213 |
| This theorem is referenced by: fissn0dvds 16579 |
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