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Mirrors > Home > MPE Home > Th. List > 6lcm4e12 | Structured version Visualization version GIF version |
Description: The least common multiple of six and four is twelve. (Contributed by AV, 27-Aug-2020.) |
Ref | Expression |
---|---|
6lcm4e12 | ⊢ (6 lcm 4) = ;12 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 6cn 11731 | . . . 4 ⊢ 6 ∈ ℂ | |
2 | 4cn 11725 | . . . 4 ⊢ 4 ∈ ℂ | |
3 | 1, 2 | mulcli 10651 | . . 3 ⊢ (6 · 4) ∈ ℂ |
4 | 6nn0 11921 | . . . . 5 ⊢ 6 ∈ ℕ0 | |
5 | 4 | nn0zi 12010 | . . . 4 ⊢ 6 ∈ ℤ |
6 | 4z 12019 | . . . 4 ⊢ 4 ∈ ℤ | |
7 | lcmcl 15948 | . . . . 5 ⊢ ((6 ∈ ℤ ∧ 4 ∈ ℤ) → (6 lcm 4) ∈ ℕ0) | |
8 | 7 | nn0cnd 11960 | . . . 4 ⊢ ((6 ∈ ℤ ∧ 4 ∈ ℤ) → (6 lcm 4) ∈ ℂ) |
9 | 5, 6, 8 | mp2an 690 | . . 3 ⊢ (6 lcm 4) ∈ ℂ |
10 | gcdcl 15858 | . . . . . 6 ⊢ ((6 ∈ ℤ ∧ 4 ∈ ℤ) → (6 gcd 4) ∈ ℕ0) | |
11 | 10 | nn0cnd 11960 | . . . . 5 ⊢ ((6 ∈ ℤ ∧ 4 ∈ ℤ) → (6 gcd 4) ∈ ℂ) |
12 | 5, 6, 11 | mp2an 690 | . . . 4 ⊢ (6 gcd 4) ∈ ℂ |
13 | 5, 6 | pm3.2i 473 | . . . . . 6 ⊢ (6 ∈ ℤ ∧ 4 ∈ ℤ) |
14 | 4ne0 11748 | . . . . . . . 8 ⊢ 4 ≠ 0 | |
15 | 14 | neii 3021 | . . . . . . 7 ⊢ ¬ 4 = 0 |
16 | 15 | intnan 489 | . . . . . 6 ⊢ ¬ (6 = 0 ∧ 4 = 0) |
17 | gcdn0cl 15854 | . . . . . 6 ⊢ (((6 ∈ ℤ ∧ 4 ∈ ℤ) ∧ ¬ (6 = 0 ∧ 4 = 0)) → (6 gcd 4) ∈ ℕ) | |
18 | 13, 16, 17 | mp2an 690 | . . . . 5 ⊢ (6 gcd 4) ∈ ℕ |
19 | 18 | nnne0i 11680 | . . . 4 ⊢ (6 gcd 4) ≠ 0 |
20 | 12, 19 | pm3.2i 473 | . . 3 ⊢ ((6 gcd 4) ∈ ℂ ∧ (6 gcd 4) ≠ 0) |
21 | 6nn 11729 | . . . . . . . 8 ⊢ 6 ∈ ℕ | |
22 | 4nn 11723 | . . . . . . . 8 ⊢ 4 ∈ ℕ | |
23 | 21, 22 | pm3.2i 473 | . . . . . . 7 ⊢ (6 ∈ ℕ ∧ 4 ∈ ℕ) |
24 | lcmgcdnn 15958 | . . . . . . 7 ⊢ ((6 ∈ ℕ ∧ 4 ∈ ℕ) → ((6 lcm 4) · (6 gcd 4)) = (6 · 4)) | |
25 | 23, 24 | mp1i 13 | . . . . . 6 ⊢ (((6 · 4) ∈ ℂ ∧ (6 lcm 4) ∈ ℂ ∧ ((6 gcd 4) ∈ ℂ ∧ (6 gcd 4) ≠ 0)) → ((6 lcm 4) · (6 gcd 4)) = (6 · 4)) |
26 | 25 | eqcomd 2830 | . . . . 5 ⊢ (((6 · 4) ∈ ℂ ∧ (6 lcm 4) ∈ ℂ ∧ ((6 gcd 4) ∈ ℂ ∧ (6 gcd 4) ≠ 0)) → (6 · 4) = ((6 lcm 4) · (6 gcd 4))) |
27 | divmul3 11306 | . . . . 5 ⊢ (((6 · 4) ∈ ℂ ∧ (6 lcm 4) ∈ ℂ ∧ ((6 gcd 4) ∈ ℂ ∧ (6 gcd 4) ≠ 0)) → (((6 · 4) / (6 gcd 4)) = (6 lcm 4) ↔ (6 · 4) = ((6 lcm 4) · (6 gcd 4)))) | |
28 | 26, 27 | mpbird 259 | . . . 4 ⊢ (((6 · 4) ∈ ℂ ∧ (6 lcm 4) ∈ ℂ ∧ ((6 gcd 4) ∈ ℂ ∧ (6 gcd 4) ≠ 0)) → ((6 · 4) / (6 gcd 4)) = (6 lcm 4)) |
29 | 28 | eqcomd 2830 | . . 3 ⊢ (((6 · 4) ∈ ℂ ∧ (6 lcm 4) ∈ ℂ ∧ ((6 gcd 4) ∈ ℂ ∧ (6 gcd 4) ≠ 0)) → (6 lcm 4) = ((6 · 4) / (6 gcd 4))) |
30 | 3, 9, 20, 29 | mp3an 1457 | . 2 ⊢ (6 lcm 4) = ((6 · 4) / (6 gcd 4)) |
31 | 6gcd4e2 15889 | . . 3 ⊢ (6 gcd 4) = 2 | |
32 | 31 | oveq2i 7170 | . 2 ⊢ ((6 · 4) / (6 gcd 4)) = ((6 · 4) / 2) |
33 | 2cn 11715 | . . . 4 ⊢ 2 ∈ ℂ | |
34 | 2ne0 11744 | . . . 4 ⊢ 2 ≠ 0 | |
35 | 1, 2, 33, 34 | divassi 11399 | . . 3 ⊢ ((6 · 4) / 2) = (6 · (4 / 2)) |
36 | 4d2e2 11810 | . . . 4 ⊢ (4 / 2) = 2 | |
37 | 36 | oveq2i 7170 | . . 3 ⊢ (6 · (4 / 2)) = (6 · 2) |
38 | 6t2e12 12205 | . . 3 ⊢ (6 · 2) = ;12 | |
39 | 35, 37, 38 | 3eqtri 2851 | . 2 ⊢ ((6 · 4) / 2) = ;12 |
40 | 30, 32, 39 | 3eqtri 2851 | 1 ⊢ (6 lcm 4) = ;12 |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ∧ wa 398 ∧ w3a 1083 = wceq 1536 ∈ wcel 2113 ≠ wne 3019 (class class class)co 7159 ℂcc 10538 0cc0 10540 1c1 10541 · cmul 10545 / cdiv 11300 ℕcn 11641 2c2 11695 4c4 11697 6c6 11699 ℤcz 11984 ;cdc 12101 gcd cgcd 15846 lcm clcm 15935 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-sep 5206 ax-nul 5213 ax-pow 5269 ax-pr 5333 ax-un 7464 ax-cnex 10596 ax-resscn 10597 ax-1cn 10598 ax-icn 10599 ax-addcl 10600 ax-addrcl 10601 ax-mulcl 10602 ax-mulrcl 10603 ax-mulcom 10604 ax-addass 10605 ax-mulass 10606 ax-distr 10607 ax-i2m1 10608 ax-1ne0 10609 ax-1rid 10610 ax-rnegex 10611 ax-rrecex 10612 ax-cnre 10613 ax-pre-lttri 10614 ax-pre-lttrn 10615 ax-pre-ltadd 10616 ax-pre-mulgt0 10617 ax-pre-sup 10618 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ne 3020 df-nel 3127 df-ral 3146 df-rex 3147 df-reu 3148 df-rmo 3149 df-rab 3150 df-v 3499 df-sbc 3776 df-csb 3887 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-pss 3957 df-nul 4295 df-if 4471 df-pw 4544 df-sn 4571 df-pr 4573 df-tp 4575 df-op 4577 df-uni 4842 df-iun 4924 df-br 5070 df-opab 5132 df-mpt 5150 df-tr 5176 df-id 5463 df-eprel 5468 df-po 5477 df-so 5478 df-fr 5517 df-we 5519 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-rn 5569 df-res 5570 df-ima 5571 df-pred 6151 df-ord 6197 df-on 6198 df-lim 6199 df-suc 6200 df-iota 6317 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7117 df-ov 7162 df-oprab 7163 df-mpo 7164 df-om 7584 df-2nd 7693 df-wrecs 7950 df-recs 8011 df-rdg 8049 df-er 8292 df-en 8513 df-dom 8514 df-sdom 8515 df-sup 8909 df-inf 8910 df-pnf 10680 df-mnf 10681 df-xr 10682 df-ltxr 10683 df-le 10684 df-sub 10875 df-neg 10876 df-div 11301 df-nn 11642 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 df-n0 11901 df-z 11985 df-dec 12102 df-uz 12247 df-rp 12393 df-fl 13165 df-mod 13241 df-seq 13373 df-exp 13433 df-cj 14461 df-re 14462 df-im 14463 df-sqrt 14597 df-abs 14598 df-dvds 15611 df-gcd 15847 df-lcm 15937 |
This theorem is referenced by: lcmf2a3a4e12 15994 |
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