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Mirrors > Home > MPE Home > Th. List > prmgaplcmlem1 | Structured version Visualization version GIF version |
Description: Lemma for prmgaplcm 16384: The least common multiple of all positive integers less than or equal to a number plus an integer greater than 1 and less then or equal to the number is divisible by that integer. (Contributed by AV, 14-Aug-2020.) (Revised by AV, 27-Aug-2020.) |
Ref | Expression |
---|---|
prmgaplcmlem1 | ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → 𝐼 ∥ ((lcm‘(1...𝑁)) + 𝐼)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq1 5060 | . . 3 ⊢ (𝑥 = 𝐼 → (𝑥 ∥ (lcm‘(1...𝑁)) ↔ 𝐼 ∥ (lcm‘(1...𝑁)))) | |
2 | fzssz 12897 | . . . . 5 ⊢ (1...𝑁) ⊆ ℤ | |
3 | fzfi 13328 | . . . . 5 ⊢ (1...𝑁) ∈ Fin | |
4 | 2, 3 | pm3.2i 471 | . . . 4 ⊢ ((1...𝑁) ⊆ ℤ ∧ (1...𝑁) ∈ Fin) |
5 | dvdslcmf 15963 | . . . 4 ⊢ (((1...𝑁) ⊆ ℤ ∧ (1...𝑁) ∈ Fin) → ∀𝑥 ∈ (1...𝑁)𝑥 ∥ (lcm‘(1...𝑁))) | |
6 | 4, 5 | mp1i 13 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → ∀𝑥 ∈ (1...𝑁)𝑥 ∥ (lcm‘(1...𝑁))) |
7 | 2eluzge1 12282 | . . . . 5 ⊢ 2 ∈ (ℤ≥‘1) | |
8 | fzss1 12934 | . . . . 5 ⊢ (2 ∈ (ℤ≥‘1) → (2...𝑁) ⊆ (1...𝑁)) | |
9 | 7, 8 | mp1i 13 | . . . 4 ⊢ (𝑁 ∈ ℕ → (2...𝑁) ⊆ (1...𝑁)) |
10 | 9 | sselda 3964 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → 𝐼 ∈ (1...𝑁)) |
11 | 1, 6, 10 | rspcdva 3622 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → 𝐼 ∥ (lcm‘(1...𝑁))) |
12 | elfzelz 12896 | . . . 4 ⊢ (𝐼 ∈ (2...𝑁) → 𝐼 ∈ ℤ) | |
13 | iddvds 15611 | . . . 4 ⊢ (𝐼 ∈ ℤ → 𝐼 ∥ 𝐼) | |
14 | 12, 13 | syl 17 | . . 3 ⊢ (𝐼 ∈ (2...𝑁) → 𝐼 ∥ 𝐼) |
15 | 14 | adantl 482 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → 𝐼 ∥ 𝐼) |
16 | 12 | adantl 482 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → 𝐼 ∈ ℤ) |
17 | lcmfcl 15960 | . . . . 5 ⊢ (((1...𝑁) ⊆ ℤ ∧ (1...𝑁) ∈ Fin) → (lcm‘(1...𝑁)) ∈ ℕ0) | |
18 | 17 | nn0zd 12073 | . . . 4 ⊢ (((1...𝑁) ⊆ ℤ ∧ (1...𝑁) ∈ Fin) → (lcm‘(1...𝑁)) ∈ ℤ) |
19 | 4, 18 | mp1i 13 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → (lcm‘(1...𝑁)) ∈ ℤ) |
20 | dvds2add 15631 | . . 3 ⊢ ((𝐼 ∈ ℤ ∧ (lcm‘(1...𝑁)) ∈ ℤ ∧ 𝐼 ∈ ℤ) → ((𝐼 ∥ (lcm‘(1...𝑁)) ∧ 𝐼 ∥ 𝐼) → 𝐼 ∥ ((lcm‘(1...𝑁)) + 𝐼))) | |
21 | 16, 19, 16, 20 | syl3anc 1363 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → ((𝐼 ∥ (lcm‘(1...𝑁)) ∧ 𝐼 ∥ 𝐼) → 𝐼 ∥ ((lcm‘(1...𝑁)) + 𝐼))) |
22 | 11, 15, 21 | mp2and 695 | 1 ⊢ ((𝑁 ∈ ℕ ∧ 𝐼 ∈ (2...𝑁)) → 𝐼 ∥ ((lcm‘(1...𝑁)) + 𝐼)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2105 ∀wral 3135 ⊆ wss 3933 class class class wbr 5057 ‘cfv 6348 (class class class)co 7145 Fincfn 8497 1c1 10526 + caddc 10528 ℕcn 11626 2c2 11680 ℤcz 11969 ℤ≥cuz 12231 ...cfz 12880 ∥ cdvds 15595 lcmclcmf 15921 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-rep 5181 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 ax-inf2 9092 ax-cnex 10581 ax-resscn 10582 ax-1cn 10583 ax-icn 10584 ax-addcl 10585 ax-addrcl 10586 ax-mulcl 10587 ax-mulrcl 10588 ax-mulcom 10589 ax-addass 10590 ax-mulass 10591 ax-distr 10592 ax-i2m1 10593 ax-1ne0 10594 ax-1rid 10595 ax-rnegex 10596 ax-rrecex 10597 ax-cnre 10598 ax-pre-lttri 10599 ax-pre-lttrn 10600 ax-pre-ltadd 10601 ax-pre-mulgt0 10602 ax-pre-sup 10603 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-fal 1541 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-nel 3121 df-ral 3140 df-rex 3141 df-reu 3142 df-rmo 3143 df-rab 3144 df-v 3494 df-sbc 3770 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-pss 3951 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-int 4868 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-se 5508 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-isom 6357 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-om 7570 df-1st 7678 df-2nd 7679 df-wrecs 7936 df-recs 7997 df-rdg 8035 df-1o 8091 df-oadd 8095 df-er 8278 df-en 8498 df-dom 8499 df-sdom 8500 df-fin 8501 df-sup 8894 df-inf 8895 df-oi 8962 df-card 9356 df-pnf 10665 df-mnf 10666 df-xr 10667 df-ltxr 10668 df-le 10669 df-sub 10860 df-neg 10861 df-div 11286 df-nn 11627 df-2 11688 df-3 11689 df-n0 11886 df-z 11970 df-uz 12232 df-rp 12378 df-fz 12881 df-fzo 13022 df-seq 13358 df-exp 13418 df-hash 13679 df-cj 14446 df-re 14447 df-im 14448 df-sqrt 14582 df-abs 14583 df-clim 14833 df-prod 15248 df-dvds 15596 df-lcmf 15923 |
This theorem is referenced by: prmgaplcmlem2 16376 |
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