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Mirrors > Home > MPE Home > Th. List > Mathboxes > nzin | Structured version Visualization version GIF version |
Description: The intersection of the set of multiples of m, mℤ, and those of n, nℤ, is the set of multiples of their least common multiple. Roughly Lemma 2.1(c) of https://www.mscs.dal.ca/~selinger/3343/handouts/ideals.pdf p. 5 and Problem 1(b) of https://people.math.binghamton.edu/mazur/teach/40107/40107h16sol.pdf p. 1, with mℤ and nℤ as images of the divides relation under m and n. (Contributed by Steve Rodriguez, 20-Jan-2020.) |
Ref | Expression |
---|---|
nzin.m | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
nzin.n | ⊢ (𝜑 → 𝑁 ∈ ℤ) |
Ref | Expression |
---|---|
nzin | ⊢ (𝜑 → (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) = ( ∥ “ {(𝑀 lcm 𝑁)})) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dvdszrcl 15614 | . . . . . . . . 9 ⊢ (𝑀 ∥ 𝑛 → (𝑀 ∈ ℤ ∧ 𝑛 ∈ ℤ)) | |
2 | dvdszrcl 15614 | . . . . . . . . 9 ⊢ (𝑁 ∥ 𝑛 → (𝑁 ∈ ℤ ∧ 𝑛 ∈ ℤ)) | |
3 | 1, 2 | anim12i 614 | . . . . . . . 8 ⊢ ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → ((𝑀 ∈ ℤ ∧ 𝑛 ∈ ℤ) ∧ (𝑁 ∈ ℤ ∧ 𝑛 ∈ ℤ))) |
4 | anandir 675 | . . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑛 ∈ ℤ) ↔ ((𝑀 ∈ ℤ ∧ 𝑛 ∈ ℤ) ∧ (𝑁 ∈ ℤ ∧ 𝑛 ∈ ℤ))) | |
5 | 3, 4 | sylibr 236 | . . . . . . 7 ⊢ ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑛 ∈ ℤ)) |
6 | 5 | ancomd 464 | . . . . . 6 ⊢ ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → (𝑛 ∈ ℤ ∧ (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ))) |
7 | lcmdvds 15954 | . . . . . . 7 ⊢ ((𝑛 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → (𝑀 lcm 𝑁) ∥ 𝑛)) | |
8 | 7 | 3expb 1116 | . . . . . 6 ⊢ ((𝑛 ∈ ℤ ∧ (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ)) → ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → (𝑀 lcm 𝑁) ∥ 𝑛)) |
9 | 6, 8 | mpcom 38 | . . . . 5 ⊢ ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → (𝑀 lcm 𝑁) ∥ 𝑛) |
10 | elin 4171 | . . . . . 6 ⊢ (𝑛 ∈ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) ↔ (𝑛 ∈ ( ∥ “ {𝑀}) ∧ 𝑛 ∈ ( ∥ “ {𝑁}))) | |
11 | reldvds 40654 | . . . . . . . 8 ⊢ Rel ∥ | |
12 | elrelimasn 5955 | . . . . . . . 8 ⊢ (Rel ∥ → (𝑛 ∈ ( ∥ “ {𝑀}) ↔ 𝑀 ∥ 𝑛)) | |
13 | 11, 12 | ax-mp 5 | . . . . . . 7 ⊢ (𝑛 ∈ ( ∥ “ {𝑀}) ↔ 𝑀 ∥ 𝑛) |
14 | elrelimasn 5955 | . . . . . . . 8 ⊢ (Rel ∥ → (𝑛 ∈ ( ∥ “ {𝑁}) ↔ 𝑁 ∥ 𝑛)) | |
15 | 11, 14 | ax-mp 5 | . . . . . . 7 ⊢ (𝑛 ∈ ( ∥ “ {𝑁}) ↔ 𝑁 ∥ 𝑛) |
16 | 13, 15 | anbi12i 628 | . . . . . 6 ⊢ ((𝑛 ∈ ( ∥ “ {𝑀}) ∧ 𝑛 ∈ ( ∥ “ {𝑁})) ↔ (𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛)) |
17 | 10, 16 | bitri 277 | . . . . 5 ⊢ (𝑛 ∈ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) ↔ (𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛)) |
18 | elrelimasn 5955 | . . . . . 6 ⊢ (Rel ∥ → (𝑛 ∈ ( ∥ “ {(𝑀 lcm 𝑁)}) ↔ (𝑀 lcm 𝑁) ∥ 𝑛)) | |
19 | 11, 18 | ax-mp 5 | . . . . 5 ⊢ (𝑛 ∈ ( ∥ “ {(𝑀 lcm 𝑁)}) ↔ (𝑀 lcm 𝑁) ∥ 𝑛) |
20 | 9, 17, 19 | 3imtr4i 294 | . . . 4 ⊢ (𝑛 ∈ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) → 𝑛 ∈ ( ∥ “ {(𝑀 lcm 𝑁)})) |
21 | 20 | ssriv 3973 | . . 3 ⊢ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) ⊆ ( ∥ “ {(𝑀 lcm 𝑁)}) |
22 | 21 | a1i 11 | . 2 ⊢ (𝜑 → (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) ⊆ ( ∥ “ {(𝑀 lcm 𝑁)})) |
23 | nzin.m | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
24 | nzin.n | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℤ) | |
25 | dvdslcm 15944 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ (𝑀 lcm 𝑁) ∧ 𝑁 ∥ (𝑀 lcm 𝑁))) | |
26 | 23, 24, 25 | syl2anc 586 | . . . . 5 ⊢ (𝜑 → (𝑀 ∥ (𝑀 lcm 𝑁) ∧ 𝑁 ∥ (𝑀 lcm 𝑁))) |
27 | 26 | simpld 497 | . . . 4 ⊢ (𝜑 → 𝑀 ∥ (𝑀 lcm 𝑁)) |
28 | lcmcl 15947 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 lcm 𝑁) ∈ ℕ0) | |
29 | 23, 24, 28 | syl2anc 586 | . . . . . 6 ⊢ (𝜑 → (𝑀 lcm 𝑁) ∈ ℕ0) |
30 | 29 | nn0zd 12088 | . . . . 5 ⊢ (𝜑 → (𝑀 lcm 𝑁) ∈ ℤ) |
31 | 30, 23 | nzss 40656 | . . . 4 ⊢ (𝜑 → (( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑀}) ↔ 𝑀 ∥ (𝑀 lcm 𝑁))) |
32 | 27, 31 | mpbird 259 | . . 3 ⊢ (𝜑 → ( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑀})) |
33 | 26 | simprd 498 | . . . 4 ⊢ (𝜑 → 𝑁 ∥ (𝑀 lcm 𝑁)) |
34 | 30, 24 | nzss 40656 | . . . 4 ⊢ (𝜑 → (( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑁}) ↔ 𝑁 ∥ (𝑀 lcm 𝑁))) |
35 | 33, 34 | mpbird 259 | . . 3 ⊢ (𝜑 → ( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑁})) |
36 | 32, 35 | ssind 4211 | . 2 ⊢ (𝜑 → ( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁}))) |
37 | 22, 36 | eqssd 3986 | 1 ⊢ (𝜑 → (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) = ( ∥ “ {(𝑀 lcm 𝑁)})) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 ∩ cin 3937 ⊆ wss 3938 {csn 4569 class class class wbr 5068 “ cima 5560 Rel wrel 5562 (class class class)co 7158 ℕ0cn0 11900 ℤcz 11984 ∥ cdvds 15609 lcm clcm 15934 |
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-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 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-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-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-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-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-sup 8908 df-inf 8909 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-fl 13165 df-mod 13241 df-seq 13373 df-exp 13433 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597 df-dvds 15610 df-gcd 15846 df-lcm 15936 |
This theorem is referenced by: nzprmdif 40658 |
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