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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 15179 | . . . . . 6 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (lcm‘𝑌) ∈ ℕ0) | |
2 | 1 | nn0zd 11356 | . . . . 5 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (lcm‘𝑌) ∈ ℤ) |
3 | lcmfsn 15186 | . . . . 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 11178 | . . . . . 6 ⊢ ((lcm‘𝑌) ∈ ℕ0 → (lcm‘𝑌) ∈ ℝ) | |
6 | nn0ge0 11195 | . . . . . 6 ⊢ ((lcm‘𝑌) ∈ ℕ0 → 0 ≤ (lcm‘𝑌)) | |
7 | 5, 6 | jca 553 | . . . . 5 ⊢ ((lcm‘𝑌) ∈ ℕ0 → ((lcm‘𝑌) ∈ ℝ ∧ 0 ≤ (lcm‘𝑌))) |
8 | absid 13884 | . . . . 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 2644 | . . 3 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → (lcm‘{(lcm‘𝑌)}) = (lcm‘𝑌)) |
11 | lcmfcl 15179 | . . . . . 6 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (lcm‘𝑍) ∈ ℕ0) | |
12 | 11 | nn0zd 11356 | . . . . 5 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (lcm‘𝑍) ∈ ℤ) |
13 | lcmfsn 15186 | . . . . 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 11178 | . . . . . 6 ⊢ ((lcm‘𝑍) ∈ ℕ0 → (lcm‘𝑍) ∈ ℝ) | |
16 | nn0ge0 11195 | . . . . . 6 ⊢ ((lcm‘𝑍) ∈ ℕ0 → 0 ≤ (lcm‘𝑍)) | |
17 | 15, 16 | jca 553 | . . . . 5 ⊢ ((lcm‘𝑍) ∈ ℕ0 → ((lcm‘𝑍) ∈ ℝ ∧ 0 ≤ (lcm‘𝑍))) |
18 | absid 13884 | . . . . 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 2645 | . . 3 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → (lcm‘𝑍) = (lcm‘{(lcm‘𝑍)})) |
21 | 10, 20 | oveqan12d 6568 | . 2 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → ((lcm‘{(lcm‘𝑌)}) lcm (lcm‘𝑍)) = ((lcm‘𝑌) lcm (lcm‘{(lcm‘𝑍)}))) |
22 | 2 | snssd 4281 | . . . 4 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → {(lcm‘𝑌)} ⊆ ℤ) |
23 | snfi 7923 | . . . 4 ⊢ {(lcm‘𝑌)} ∈ Fin | |
24 | 22, 23 | jctir 559 | . . 3 ⊢ ((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) → ({(lcm‘𝑌)} ⊆ ℤ ∧ {(lcm‘𝑌)} ∈ Fin)) |
25 | lcmfun 15196 | . . 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 487 | . 2 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → (lcm‘({(lcm‘𝑌)} ∪ 𝑍)) = ((lcm‘{(lcm‘𝑌)}) lcm (lcm‘𝑍))) |
27 | 12 | snssd 4281 | . . . 4 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → {(lcm‘𝑍)} ⊆ ℤ) |
28 | snfi 7923 | . . . 4 ⊢ {(lcm‘𝑍)} ∈ Fin | |
29 | 27, 28 | jctir 559 | . . 3 ⊢ ((𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin) → ({(lcm‘𝑍)} ⊆ ℤ ∧ {(lcm‘𝑍)} ∈ Fin)) |
30 | lcmfun 15196 | . . 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 490 | . 2 ⊢ (((𝑌 ⊆ ℤ ∧ 𝑌 ∈ Fin) ∧ (𝑍 ⊆ ℤ ∧ 𝑍 ∈ Fin)) → (lcm‘(𝑌 ∪ {(lcm‘𝑍)})) = ((lcm‘𝑌) lcm (lcm‘{(lcm‘𝑍)}))) |
32 | 21, 26, 31 | 3eqtr4d 2654 | 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 383 = wceq 1475 ∈ wcel 1977 ∪ cun 3538 ⊆ wss 3540 {csn 4125 class class class wbr 4583 ‘cfv 5804 (class class class)co 6549 Fincfn 7841 ℝcr 9814 0cc0 9815 ≤ cle 9954 ℕ0cn0 11169 ℤcz 11254 abscabs 13822 lcm clcm 15139 lcmclcmf 15140 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-oadd 7451 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-sup 8231 df-inf 8232 df-oi 8298 df-card 8648 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-rp 11709 df-fz 12198 df-fzo 12335 df-fl 12455 df-mod 12531 df-seq 12664 df-exp 12723 df-hash 12980 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-clim 14067 df-prod 14475 df-dvds 14822 df-gcd 15055 df-lcm 15141 df-lcmf 15142 |
This theorem is referenced by: (None) |
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