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Mirrors > Home > MPE Home > Th. List > Mathboxes > lcm2un | Structured version Visualization version GIF version |
Description: Least common multiple of natural numbers up to 2 equals 2. (Contributed by metakunt, 25-Apr-2024.) |
Ref | Expression |
---|---|
lcm2un | ⊢ (lcm‘(1...2)) = 2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2nn 12286 | . . . 4 ⊢ 2 ∈ ℕ | |
2 | id 22 | . . . . 5 ⊢ (2 ∈ ℕ → 2 ∈ ℕ) | |
3 | 2 | lcmfunnnd 41391 | . . . 4 ⊢ (2 ∈ ℕ → (lcm‘(1...2)) = ((lcm‘(1...(2 − 1))) lcm 2)) |
4 | 1, 3 | ax-mp 5 | . . 3 ⊢ (lcm‘(1...2)) = ((lcm‘(1...(2 − 1))) lcm 2) |
5 | 2m1e1 12339 | . . . . . 6 ⊢ (2 − 1) = 1 | |
6 | 5 | oveq2i 7415 | . . . . 5 ⊢ (1...(2 − 1)) = (1...1) |
7 | 6 | fveq2i 6887 | . . . 4 ⊢ (lcm‘(1...(2 − 1))) = (lcm‘(1...1)) |
8 | 7 | oveq1i 7414 | . . 3 ⊢ ((lcm‘(1...(2 − 1))) lcm 2) = ((lcm‘(1...1)) lcm 2) |
9 | 4, 8 | eqtri 2754 | . 2 ⊢ (lcm‘(1...2)) = ((lcm‘(1...1)) lcm 2) |
10 | lcm1un 41392 | . . . 4 ⊢ (lcm‘(1...1)) = 1 | |
11 | 10 | oveq1i 7414 | . . 3 ⊢ ((lcm‘(1...1)) lcm 2) = (1 lcm 2) |
12 | 1z 12593 | . . . . 5 ⊢ 1 ∈ ℤ | |
13 | 2z 12595 | . . . . 5 ⊢ 2 ∈ ℤ | |
14 | lcmcom 16535 | . . . . 5 ⊢ ((1 ∈ ℤ ∧ 2 ∈ ℤ) → (1 lcm 2) = (2 lcm 1)) | |
15 | 12, 13, 14 | mp2an 689 | . . . 4 ⊢ (1 lcm 2) = (2 lcm 1) |
16 | lcm1 16552 | . . . . . 6 ⊢ (2 ∈ ℤ → (2 lcm 1) = (abs‘2)) | |
17 | 13, 16 | ax-mp 5 | . . . . 5 ⊢ (2 lcm 1) = (abs‘2) |
18 | 2re 12287 | . . . . . . 7 ⊢ 2 ∈ ℝ | |
19 | 0le2 12315 | . . . . . . 7 ⊢ 0 ≤ 2 | |
20 | 18, 19 | pm3.2i 470 | . . . . . 6 ⊢ (2 ∈ ℝ ∧ 0 ≤ 2) |
21 | absid 15247 | . . . . . 6 ⊢ ((2 ∈ ℝ ∧ 0 ≤ 2) → (abs‘2) = 2) | |
22 | 20, 21 | ax-mp 5 | . . . . 5 ⊢ (abs‘2) = 2 |
23 | 17, 22 | eqtri 2754 | . . . 4 ⊢ (2 lcm 1) = 2 |
24 | 15, 23 | eqtri 2754 | . . 3 ⊢ (1 lcm 2) = 2 |
25 | 11, 24 | eqtri 2754 | . 2 ⊢ ((lcm‘(1...1)) lcm 2) = 2 |
26 | 9, 25 | eqtri 2754 | 1 ⊢ (lcm‘(1...2)) = 2 |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 = wceq 1533 ∈ wcel 2098 class class class wbr 5141 ‘cfv 6536 (class class class)co 7404 ℝcr 11108 0cc0 11109 1c1 11110 ≤ cle 11250 − cmin 11445 ℕcn 12213 2c2 12268 ℤcz 12559 ...cfz 13487 abscabs 15185 lcm clcm 16530 lcmclcmf 16531 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 ax-inf2 9635 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-1o 8464 df-er 8702 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-sup 9436 df-inf 9437 df-oi 9504 df-card 9933 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11447 df-neg 11448 df-div 11873 df-nn 12214 df-2 12276 df-3 12277 df-n0 12474 df-z 12560 df-uz 12824 df-rp 12978 df-fz 13488 df-fzo 13631 df-fl 13760 df-mod 13838 df-seq 13970 df-exp 14031 df-hash 14294 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-clim 15436 df-prod 15854 df-dvds 16203 df-gcd 16441 df-lcm 16532 df-lcmf 16533 |
This theorem is referenced by: lcm3un 41394 |
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