Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > lcmfass | Structured version Visualization version GIF version |
Description: Associative law for the lcm function. (Contributed by AV, 27-Aug-2020.) |
Ref | Expression |
---|---|
lcmfass | ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → (lcm‘({(lcm‘𝑌)} ∪ 𝑍)) = (lcm‘(𝑌 ∪ {(lcm‘𝑍)}))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lcmfcl 16333 | . . . . . 6 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (lcm‘𝑌) ∈ ℕ0) | |
2 | 1 | nn0zd 12424 | . . . . 5 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (lcm‘𝑌) ∈ ℤ) |
3 | lcmfsn 16340 | . . . . 5 ⊢ ((lcm‘𝑌) ∈ ℤ → (lcm‘{(lcm‘𝑌)}) = (abs‘(lcm‘𝑌))) | |
4 | 2, 3 | syl 17 | . . . 4 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (lcm‘{(lcm‘𝑌)}) = (abs‘(lcm‘𝑌))) |
5 | nn0re 12242 | . . . . . 6 ⊢ ((lcm‘𝑌) ∈ ℕ0 → (lcm‘𝑌) ∈ ℝ) | |
6 | nn0ge0 12258 | . . . . . 6 ⊢ ((lcm‘𝑌) ∈ ℕ0 → 0 ≤ (lcm‘𝑌)) | |
7 | 5, 6 | jca 512 | . . . . 5 ⊢ ((lcm‘𝑌) ∈ ℕ0 → ((lcm‘𝑌) ∈ ℝ ∧ 0 ≤ (lcm‘𝑌))) |
8 | absid 15008 | . . . . 5 ⊢ (((lcm‘𝑌) ∈ ℝ ∧ 0 ≤ (lcm‘𝑌)) → (abs‘(lcm‘𝑌)) = (lcm‘𝑌)) | |
9 | 1, 7, 8 | 3syl 18 | . . . 4 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (abs‘(lcm‘𝑌)) = (lcm‘𝑌)) |
10 | 4, 9 | eqtrd 2778 | . . 3 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (lcm‘{(lcm‘𝑌)}) = (lcm‘𝑌)) |
11 | lcmfcl 16333 | . . . . . 6 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (lcm‘𝑍) ∈ ℕ0) | |
12 | 11 | nn0zd 12424 | . . . . 5 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (lcm‘𝑍) ∈ ℤ) |
13 | lcmfsn 16340 | . . . . 5 ⊢ ((lcm‘𝑍) ∈ ℤ → (lcm‘{(lcm‘𝑍)}) = (abs‘(lcm‘𝑍))) | |
14 | 12, 13 | syl 17 | . . . 4 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (lcm‘{(lcm‘𝑍)}) = (abs‘(lcm‘𝑍))) |
15 | nn0re 12242 | . . . . . 6 ⊢ ((lcm‘𝑍) ∈ ℕ0 → (lcm‘𝑍) ∈ ℝ) | |
16 | nn0ge0 12258 | . . . . . 6 ⊢ ((lcm‘𝑍) ∈ ℕ0 → 0 ≤ (lcm‘𝑍)) | |
17 | 15, 16 | jca 512 | . . . . 5 ⊢ ((lcm‘𝑍) ∈ ℕ0 → ((lcm‘𝑍) ∈ ℝ ∧ 0 ≤ (lcm‘𝑍))) |
18 | absid 15008 | . . . . 5 ⊢ (((lcm‘𝑍) ∈ ℝ ∧ 0 ≤ (lcm‘𝑍)) → (abs‘(lcm‘𝑍)) = (lcm‘𝑍)) | |
19 | 11, 17, 18 | 3syl 18 | . . . 4 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (abs‘(lcm‘𝑍)) = (lcm‘𝑍)) |
20 | 14, 19 | eqtr2d 2779 | . . 3 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (lcm‘𝑍) = (lcm‘{(lcm‘𝑍)})) |
21 | 10, 20 | oveqan12d 7294 | . 2 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → ((lcm‘{(lcm‘𝑌)}) lcm (lcm‘𝑍)) = ((lcm‘𝑌) lcm (lcm‘{(lcm‘𝑍)}))) |
22 | 2 | snssd 4742 | . . . 4 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → {(lcm‘𝑌)} ⊆ ℤ) |
23 | snfi 8834 | . . . 4 ⊢ {(lcm‘𝑌)} ∈ Fin | |
24 | 22, 23 | jctir 521 | . . 3 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → ({(lcm‘𝑌)} ⊆ ℤ ∧ {(lcm‘𝑌)} ∈ Fin)) |
25 | lcmfun 16350 | . . 3 ⊢ ((({(lcm‘𝑌)} ⊆ ℤ ∧ {(lcm‘𝑌)} ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → (lcm‘({(lcm‘𝑌)} ∪ 𝑍)) = ((lcm‘{(lcm‘𝑌)}) lcm (lcm‘𝑍))) | |
26 | 24, 25 | sylan 580 | . 2 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → (lcm‘({(lcm‘𝑌)} ∪ 𝑍)) = ((lcm‘{(lcm‘𝑌)}) lcm (lcm‘𝑍))) |
27 | 12 | snssd 4742 | . . . 4 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → {(lcm‘𝑍)} ⊆ ℤ) |
28 | snfi 8834 | . . . 4 ⊢ {(lcm‘𝑍)} ∈ Fin | |
29 | 27, 28 | jctir 521 | . . 3 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → ({(lcm‘𝑍)} ⊆ ℤ ∧ {(lcm‘𝑍)} ∈ Fin)) |
30 | lcmfun 16350 | . . 3 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ ({(lcm‘𝑍)} ⊆ ℤ ∧ {(lcm‘𝑍)} ∈ Fin)) → (lcm‘(𝑌 ∪ {(lcm‘𝑍)})) = ((lcm‘𝑌) lcm (lcm‘{(lcm‘𝑍)}))) | |
31 | 29, 30 | sylan2 593 | . 2 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → (lcm‘(𝑌 ∪ {(lcm‘𝑍)})) = ((lcm‘𝑌) lcm (lcm‘{(lcm‘𝑍)}))) |
32 | 21, 26, 31 | 3eqtr4d 2788 | 1 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → (lcm‘({(lcm‘𝑌)} ∪ 𝑍)) = (lcm‘(𝑌 ∪ {(lcm‘𝑍)}))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∪ cun 3885 ⊆ wss 3887 {csn 4561 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 Fincfn 8733 ℝcr 10870 0cc0 10871 ≤ cle 11010 ℕ0cn0 12233 ℤcz 12319 abscabs 14945 lcm clcm 16293 lcmclcmf 16294 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 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 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-inf 9202 df-oi 9269 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-fzo 13383 df-fl 13512 df-mod 13590 df-seq 13722 df-exp 13783 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-clim 15197 df-prod 15616 df-dvds 15964 df-gcd 16202 df-lcm 16295 df-lcmf 16296 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |