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Mirrors > Home > MPE Home > Th. List > Mathboxes > lcm4un | Structured version Visualization version GIF version |
Description: Least common multiple of natural numbers up to 4 equals 12. (Contributed by metakunt, 25-Apr-2024.) |
Ref | Expression |
---|---|
lcm4un | ⊢ (lcm‘(1...4)) = ;12 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 4nn 11707 | . . 3 ⊢ 4 ∈ ℕ | |
2 | id 22 | . . . 4 ⊢ (4 ∈ ℕ → 4 ∈ ℕ) | |
3 | 2 | lcmfunnnd 39159 | . . 3 ⊢ (4 ∈ ℕ → (lcm‘(1...4)) = ((lcm‘(1...(4 − 1))) lcm 4)) |
4 | 1, 3 | ax-mp 5 | . 2 ⊢ (lcm‘(1...4)) = ((lcm‘(1...(4 − 1))) lcm 4) |
5 | 4m1e3 11753 | . . . . . 6 ⊢ (4 − 1) = 3 | |
6 | 5 | oveq2i 7153 | . . . . 5 ⊢ (1...(4 − 1)) = (1...3) |
7 | 6 | fveq2i 6659 | . . . 4 ⊢ (lcm‘(1...(4 − 1))) = (lcm‘(1...3)) |
8 | lcm3un 39162 | . . . 4 ⊢ (lcm‘(1...3)) = 6 | |
9 | 7, 8 | eqtri 2844 | . . 3 ⊢ (lcm‘(1...(4 − 1))) = 6 |
10 | 9 | oveq1i 7152 | . 2 ⊢ ((lcm‘(1...(4 − 1))) lcm 4) = (6 lcm 4) |
11 | 6lcm4e12 15943 | . 2 ⊢ (6 lcm 4) = ;12 | |
12 | 4, 10, 11 | 3eqtri 2848 | 1 ⊢ (lcm‘(1...4)) = ;12 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∈ wcel 2114 ‘cfv 6341 (class class class)co 7142 1c1 10524 − cmin 10856 ℕcn 11624 2c2 11679 3c3 11680 4c4 11681 6c6 11683 ;cdc 12085 ...cfz 12882 lcm clcm 15915 lcmclcmf 15916 |
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 2793 ax-rep 5176 ax-sep 5189 ax-nul 5196 ax-pow 5252 ax-pr 5316 ax-un 7447 ax-inf2 9090 ax-cnex 10579 ax-resscn 10580 ax-1cn 10581 ax-icn 10582 ax-addcl 10583 ax-addrcl 10584 ax-mulcl 10585 ax-mulrcl 10586 ax-mulcom 10587 ax-addass 10588 ax-mulass 10589 ax-distr 10590 ax-i2m1 10591 ax-1ne0 10592 ax-1rid 10593 ax-rnegex 10594 ax-rrecex 10595 ax-cnre 10596 ax-pre-lttri 10597 ax-pre-lttrn 10598 ax-pre-ltadd 10599 ax-pre-mulgt0 10600 ax-pre-sup 10601 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3488 df-sbc 3764 df-csb 3872 df-dif 3927 df-un 3929 df-in 3931 df-ss 3940 df-pss 3942 df-nul 4280 df-if 4454 df-pw 4527 df-sn 4554 df-pr 4556 df-tp 4558 df-op 4560 df-uni 4825 df-int 4863 df-iun 4907 df-br 5053 df-opab 5115 df-mpt 5133 df-tr 5159 df-id 5446 df-eprel 5451 df-po 5460 df-so 5461 df-fr 5500 df-se 5501 df-we 5502 df-xp 5547 df-rel 5548 df-cnv 5549 df-co 5550 df-dm 5551 df-rn 5552 df-res 5553 df-ima 5554 df-pred 6134 df-ord 6180 df-on 6181 df-lim 6182 df-suc 6183 df-iota 6300 df-fun 6343 df-fn 6344 df-f 6345 df-f1 6346 df-fo 6347 df-f1o 6348 df-fv 6349 df-isom 6350 df-riota 7100 df-ov 7145 df-oprab 7146 df-mpo 7147 df-om 7567 df-1st 7675 df-2nd 7676 df-wrecs 7933 df-recs 7994 df-rdg 8032 df-1o 8088 df-2o 8089 df-oadd 8092 df-er 8275 df-en 8496 df-dom 8497 df-sdom 8498 df-fin 8499 df-sup 8892 df-inf 8893 df-oi 8960 df-card 9354 df-pnf 10663 df-mnf 10664 df-xr 10665 df-ltxr 10666 df-le 10667 df-sub 10858 df-neg 10859 df-div 11284 df-nn 11625 df-2 11687 df-3 11688 df-4 11689 df-5 11690 df-6 11691 df-7 11692 df-8 11693 df-9 11694 df-n0 11885 df-z 11969 df-dec 12086 df-uz 12231 df-rp 12377 df-fz 12883 df-fzo 13024 df-fl 13152 df-mod 13228 df-seq 13360 df-exp 13420 df-hash 13681 df-cj 14443 df-re 14444 df-im 14445 df-sqrt 14579 df-abs 14580 df-clim 14830 df-prod 15245 df-dvds 15593 df-gcd 15827 df-lcm 15917 df-lcmf 15918 df-prm 15999 |
This theorem is referenced by: lcm5un 39164 |
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