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Mirrors > Home > MPE Home > Th. List > Mathboxes > lcm3un | Structured version Visualization version GIF version |
Description: Least common multiple of natural numbers up to 3 equals 6. (Contributed by metakunt, 25-Apr-2024.) |
Ref | Expression |
---|---|
lcm3un | ⊢ (lcm‘(1...3)) = 6 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3nn 11982 | . . 3 ⊢ 3 ∈ ℕ | |
2 | id 22 | . . . 4 ⊢ (3 ∈ ℕ → 3 ∈ ℕ) | |
3 | 2 | lcmfunnnd 39948 | . . 3 ⊢ (3 ∈ ℕ → (lcm‘(1...3)) = ((lcm‘(1...(3 − 1))) lcm 3)) |
4 | 1, 3 | ax-mp 5 | . 2 ⊢ (lcm‘(1...3)) = ((lcm‘(1...(3 − 1))) lcm 3) |
5 | 3m1e2 12031 | . . . . . . 7 ⊢ (3 − 1) = 2 | |
6 | 5 | oveq2i 7266 | . . . . . 6 ⊢ (1...(3 − 1)) = (1...2) |
7 | 6 | fveq2i 6759 | . . . . 5 ⊢ (lcm‘(1...(3 − 1))) = (lcm‘(1...2)) |
8 | lcm2un 39950 | . . . . 5 ⊢ (lcm‘(1...2)) = 2 | |
9 | 7, 8 | eqtri 2766 | . . . 4 ⊢ (lcm‘(1...(3 − 1))) = 2 |
10 | 9 | oveq1i 7265 | . . 3 ⊢ ((lcm‘(1...(3 − 1))) lcm 3) = (2 lcm 3) |
11 | 2z 12282 | . . . . . 6 ⊢ 2 ∈ ℤ | |
12 | 3z 12283 | . . . . . 6 ⊢ 3 ∈ ℤ | |
13 | 11, 12 | pm3.2i 470 | . . . . 5 ⊢ (2 ∈ ℤ ∧ 3 ∈ ℤ) |
14 | lcmcom 16226 | . . . . 5 ⊢ ((2 ∈ ℤ ∧ 3 ∈ ℤ) → (2 lcm 3) = (3 lcm 2)) | |
15 | 13, 14 | ax-mp 5 | . . . 4 ⊢ (2 lcm 3) = (3 lcm 2) |
16 | 3lcm2e6 16364 | . . . 4 ⊢ (3 lcm 2) = 6 | |
17 | 15, 16 | eqtri 2766 | . . 3 ⊢ (2 lcm 3) = 6 |
18 | 10, 17 | eqtri 2766 | . 2 ⊢ ((lcm‘(1...(3 − 1))) lcm 3) = 6 |
19 | 4, 18 | eqtri 2766 | 1 ⊢ (lcm‘(1...3)) = 6 |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 = wceq 1539 ∈ wcel 2108 ‘cfv 6418 (class class class)co 7255 1c1 10803 − cmin 11135 ℕcn 11903 2c2 11958 3c3 11959 6c6 11962 ℤcz 12249 ...cfz 13168 lcm clcm 16221 lcmclcmf 16222 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-inf 9132 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-fz 13169 df-fzo 13312 df-fl 13440 df-mod 13518 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-clim 15125 df-prod 15544 df-dvds 15892 df-gcd 16130 df-lcm 16223 df-lcmf 16224 df-prm 16305 |
This theorem is referenced by: lcm4un 39952 |
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