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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 16141 | . . . . . . . . 9 ⊢ (𝑀 ∥ 𝑛 → (𝑀 ∈ ℤ ∧ 𝑛 ∈ ℤ)) | |
2 | dvdszrcl 16141 | . . . . . . . . 9 ⊢ (𝑁 ∥ 𝑛 → (𝑁 ∈ ℤ ∧ 𝑛 ∈ ℤ)) | |
3 | 1, 2 | anim12i 613 | . . . . . . . 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 233 | . . . . . . 7 ⊢ ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑛 ∈ ℤ)) |
6 | 5 | ancomd 462 | . . . . . 6 ⊢ ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → (𝑛 ∈ ℤ ∧ (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ))) |
7 | lcmdvds 16484 | . . . . . . 7 ⊢ ((𝑛 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛) → (𝑀 lcm 𝑁) ∥ 𝑛)) | |
8 | 7 | 3expb 1120 | . . . . . 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 3926 | . . . . . 6 ⊢ (𝑛 ∈ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) ↔ (𝑛 ∈ ( ∥ “ {𝑀}) ∧ 𝑛 ∈ ( ∥ “ {𝑁}))) | |
11 | reldvds 42585 | . . . . . . . 8 ⊢ Rel ∥ | |
12 | elrelimasn 6037 | . . . . . . . 8 ⊢ (Rel ∥ → (𝑛 ∈ ( ∥ “ {𝑀}) ↔ 𝑀 ∥ 𝑛)) | |
13 | 11, 12 | ax-mp 5 | . . . . . . 7 ⊢ (𝑛 ∈ ( ∥ “ {𝑀}) ↔ 𝑀 ∥ 𝑛) |
14 | elrelimasn 6037 | . . . . . . . 8 ⊢ (Rel ∥ → (𝑛 ∈ ( ∥ “ {𝑁}) ↔ 𝑁 ∥ 𝑛)) | |
15 | 11, 14 | ax-mp 5 | . . . . . . 7 ⊢ (𝑛 ∈ ( ∥ “ {𝑁}) ↔ 𝑁 ∥ 𝑛) |
16 | 13, 15 | anbi12i 627 | . . . . . 6 ⊢ ((𝑛 ∈ ( ∥ “ {𝑀}) ∧ 𝑛 ∈ ( ∥ “ {𝑁})) ↔ (𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛)) |
17 | 10, 16 | bitri 274 | . . . . 5 ⊢ (𝑛 ∈ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) ↔ (𝑀 ∥ 𝑛 ∧ 𝑁 ∥ 𝑛)) |
18 | elrelimasn 6037 | . . . . . 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 291 | . . . 4 ⊢ (𝑛 ∈ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) → 𝑛 ∈ ( ∥ “ {(𝑀 lcm 𝑁)})) |
21 | 20 | ssriv 3948 | . . 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 16474 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ (𝑀 lcm 𝑁) ∧ 𝑁 ∥ (𝑀 lcm 𝑁))) | |
26 | 23, 24, 25 | syl2anc 584 | . . . . 5 ⊢ (𝜑 → (𝑀 ∥ (𝑀 lcm 𝑁) ∧ 𝑁 ∥ (𝑀 lcm 𝑁))) |
27 | 26 | simpld 495 | . . . 4 ⊢ (𝜑 → 𝑀 ∥ (𝑀 lcm 𝑁)) |
28 | lcmcl 16477 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 lcm 𝑁) ∈ ℕ0) | |
29 | 23, 24, 28 | syl2anc 584 | . . . . . 6 ⊢ (𝜑 → (𝑀 lcm 𝑁) ∈ ℕ0) |
30 | 29 | nn0zd 12525 | . . . . 5 ⊢ (𝜑 → (𝑀 lcm 𝑁) ∈ ℤ) |
31 | 30, 23 | nzss 42587 | . . . 4 ⊢ (𝜑 → (( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑀}) ↔ 𝑀 ∥ (𝑀 lcm 𝑁))) |
32 | 27, 31 | mpbird 256 | . . 3 ⊢ (𝜑 → ( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑀})) |
33 | 26 | simprd 496 | . . . 4 ⊢ (𝜑 → 𝑁 ∥ (𝑀 lcm 𝑁)) |
34 | 30, 24 | nzss 42587 | . . . 4 ⊢ (𝜑 → (( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑁}) ↔ 𝑁 ∥ (𝑀 lcm 𝑁))) |
35 | 33, 34 | mpbird 256 | . . 3 ⊢ (𝜑 → ( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ ( ∥ “ {𝑁})) |
36 | 32, 35 | ssind 4192 | . 2 ⊢ (𝜑 → ( ∥ “ {(𝑀 lcm 𝑁)}) ⊆ (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁}))) |
37 | 22, 36 | eqssd 3961 | 1 ⊢ (𝜑 → (( ∥ “ {𝑀}) ∩ ( ∥ “ {𝑁})) = ( ∥ “ {(𝑀 lcm 𝑁)})) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∩ cin 3909 ⊆ wss 3910 {csn 4586 class class class wbr 5105 “ cima 5636 Rel wrel 5638 (class class class)co 7357 ℕ0cn0 12413 ℤcz 12499 ∥ cdvds 16136 lcm clcm 16464 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 ax-cnex 11107 ax-resscn 11108 ax-1cn 11109 ax-icn 11110 ax-addcl 11111 ax-addrcl 11112 ax-mulcl 11113 ax-mulrcl 11114 ax-mulcom 11115 ax-addass 11116 ax-mulass 11117 ax-distr 11118 ax-i2m1 11119 ax-1ne0 11120 ax-1rid 11121 ax-rnegex 11122 ax-rrecex 11123 ax-cnre 11124 ax-pre-lttri 11125 ax-pre-lttrn 11126 ax-pre-ltadd 11127 ax-pre-mulgt0 11128 ax-pre-sup 11129 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-rmo 3353 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-pss 3929 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-op 4593 df-uni 4866 df-iun 4956 df-br 5106 df-opab 5168 df-mpt 5189 df-tr 5223 df-id 5531 df-eprel 5537 df-po 5545 df-so 5546 df-fr 5588 df-we 5590 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-pred 6253 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-riota 7313 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7803 df-2nd 7922 df-frecs 8212 df-wrecs 8243 df-recs 8317 df-rdg 8356 df-er 8648 df-en 8884 df-dom 8885 df-sdom 8886 df-sup 9378 df-inf 9379 df-pnf 11191 df-mnf 11192 df-xr 11193 df-ltxr 11194 df-le 11195 df-sub 11387 df-neg 11388 df-div 11813 df-nn 12154 df-2 12216 df-3 12217 df-n0 12414 df-z 12500 df-uz 12764 df-rp 12916 df-fl 13697 df-mod 13775 df-seq 13907 df-exp 13968 df-cj 14984 df-re 14985 df-im 14986 df-sqrt 15120 df-abs 15121 df-dvds 16137 df-gcd 16375 df-lcm 16466 |
This theorem is referenced by: nzprmdif 42589 |
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