Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > fproddvdsd | Structured version Visualization version GIF version |
Description: A finite product of integers is divisible by any of its factors. (Contributed by AV, 14-Aug-2020.) (Proof shortened by AV, 2-Aug-2021.) |
Ref | Expression |
---|---|
fproddvdsd.f | ⊢ (𝜑 → 𝐴 ∈ Fin) |
fproddvdsd.s | ⊢ (𝜑 → 𝐴 ⊆ ℤ) |
Ref | Expression |
---|---|
fproddvdsd | ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 𝑥 ∥ ∏𝑘 ∈ 𝐴 𝑘) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fproddvdsd.f | . . 3 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
2 | fproddvdsd.s | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℤ) | |
3 | f1oi 6654 | . . . 4 ⊢ ( I ↾ ℤ):ℤ–1-1-onto→ℤ | |
4 | f1of 6617 | . . . 4 ⊢ (( I ↾ ℤ):ℤ–1-1-onto→ℤ → ( I ↾ ℤ):ℤ⟶ℤ) | |
5 | 3, 4 | mp1i 13 | . . 3 ⊢ (𝜑 → ( I ↾ ℤ):ℤ⟶ℤ) |
6 | 1, 2, 5 | fprodfvdvdsd 15685 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (( I ↾ ℤ)‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (( I ↾ ℤ)‘𝑘)) |
7 | 2 | sselda 3969 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℤ) |
8 | fvresi 6937 | . . . . . 6 ⊢ (𝑥 ∈ ℤ → (( I ↾ ℤ)‘𝑥) = 𝑥) | |
9 | 7, 8 | syl 17 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (( I ↾ ℤ)‘𝑥) = 𝑥) |
10 | 9 | eqcomd 2829 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 = (( I ↾ ℤ)‘𝑥)) |
11 | 2 | sseld 3968 | . . . . . . . . 9 ⊢ (𝜑 → (𝑘 ∈ 𝐴 → 𝑘 ∈ ℤ)) |
12 | 11 | adantr 483 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑘 ∈ 𝐴 → 𝑘 ∈ ℤ)) |
13 | 12 | imp 409 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ ℤ) |
14 | fvresi 6937 | . . . . . . 7 ⊢ (𝑘 ∈ ℤ → (( I ↾ ℤ)‘𝑘) = 𝑘) | |
15 | 13, 14 | syl 17 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → (( I ↾ ℤ)‘𝑘) = 𝑘) |
16 | 15 | eqcomd 2829 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝐴) → 𝑘 = (( I ↾ ℤ)‘𝑘)) |
17 | 16 | prodeq2dv 15279 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∏𝑘 ∈ 𝐴 𝑘 = ∏𝑘 ∈ 𝐴 (( I ↾ ℤ)‘𝑘)) |
18 | 10, 17 | breq12d 5081 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑥 ∥ ∏𝑘 ∈ 𝐴 𝑘 ↔ (( I ↾ ℤ)‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (( I ↾ ℤ)‘𝑘))) |
19 | 18 | ralbidva 3198 | . 2 ⊢ (𝜑 → (∀𝑥 ∈ 𝐴 𝑥 ∥ ∏𝑘 ∈ 𝐴 𝑘 ↔ ∀𝑥 ∈ 𝐴 (( I ↾ ℤ)‘𝑥) ∥ ∏𝑘 ∈ 𝐴 (( I ↾ ℤ)‘𝑘))) |
20 | 6, 19 | mpbird 259 | 1 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 𝑥 ∥ ∏𝑘 ∈ 𝐴 𝑘) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ∀wral 3140 ⊆ wss 3938 class class class wbr 5068 I cid 5461 ↾ cres 5559 ⟶wf 6353 –1-1-onto→wf1o 6356 ‘cfv 6357 Fincfn 8511 ℤcz 11984 ∏cprod 15261 ∥ cdvds 15609 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-inf2 9106 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-int 4879 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-se 5517 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-isom 6366 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-1o 8104 df-oadd 8108 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-fin 8515 df-sup 8908 df-oi 8976 df-card 9370 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-n0 11901 df-z 11985 df-uz 12247 df-rp 12393 df-fz 12896 df-fzo 13037 df-seq 13373 df-exp 13433 df-hash 13694 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597 df-clim 14847 df-prod 15262 df-dvds 15610 |
This theorem is referenced by: absproddvds 15963 |
Copyright terms: Public domain | W3C validator |