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Mirrors > Home > MPE Home > Th. List > gcdi | Structured version Visualization version GIF version |
Description: Calculate a GCD via Euclid's algorithm. (Contributed by Mario Carneiro, 19-Feb-2014.) |
Ref | Expression |
---|---|
gcdi.1 | ⊢ 𝐾 ∈ ℕ0 |
gcdi.2 | ⊢ 𝑅 ∈ ℕ0 |
gcdi.3 | ⊢ 𝑁 ∈ ℕ0 |
gcdi.5 | ⊢ (𝑁 gcd 𝑅) = 𝐺 |
gcdi.4 | ⊢ ((𝐾 · 𝑁) + 𝑅) = 𝑀 |
Ref | Expression |
---|---|
gcdi | ⊢ (𝑀 gcd 𝑁) = 𝐺 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | gcdi.1 | . . . . . . 7 ⊢ 𝐾 ∈ ℕ0 | |
2 | gcdi.3 | . . . . . . 7 ⊢ 𝑁 ∈ ℕ0 | |
3 | 1, 2 | nn0mulcli 12299 | . . . . . 6 ⊢ (𝐾 · 𝑁) ∈ ℕ0 |
4 | 3 | nn0cni 12273 | . . . . 5 ⊢ (𝐾 · 𝑁) ∈ ℂ |
5 | gcdi.2 | . . . . . 6 ⊢ 𝑅 ∈ ℕ0 | |
6 | 5 | nn0cni 12273 | . . . . 5 ⊢ 𝑅 ∈ ℂ |
7 | gcdi.4 | . . . . 5 ⊢ ((𝐾 · 𝑁) + 𝑅) = 𝑀 | |
8 | 4, 6, 7 | addcomli 11195 | . . . 4 ⊢ (𝑅 + (𝐾 · 𝑁)) = 𝑀 |
9 | 8 | oveq2i 7306 | . . 3 ⊢ (𝑁 gcd (𝑅 + (𝐾 · 𝑁))) = (𝑁 gcd 𝑀) |
10 | 1 | nn0zi 12373 | . . . 4 ⊢ 𝐾 ∈ ℤ |
11 | 2 | nn0zi 12373 | . . . 4 ⊢ 𝑁 ∈ ℤ |
12 | 5 | nn0zi 12373 | . . . 4 ⊢ 𝑅 ∈ ℤ |
13 | gcdaddm 16260 | . . . 4 ⊢ ((𝐾 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑅 ∈ ℤ) → (𝑁 gcd 𝑅) = (𝑁 gcd (𝑅 + (𝐾 · 𝑁)))) | |
14 | 10, 11, 12, 13 | mp3an 1459 | . . 3 ⊢ (𝑁 gcd 𝑅) = (𝑁 gcd (𝑅 + (𝐾 · 𝑁))) |
15 | 1, 2, 5 | numcl 12478 | . . . . . 6 ⊢ ((𝐾 · 𝑁) + 𝑅) ∈ ℕ0 |
16 | 7, 15 | eqeltrri 2831 | . . . . 5 ⊢ 𝑀 ∈ ℕ0 |
17 | 16 | nn0zi 12373 | . . . 4 ⊢ 𝑀 ∈ ℤ |
18 | gcdcom 16248 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 gcd 𝑁) = (𝑁 gcd 𝑀)) | |
19 | 17, 11, 18 | mp2an 688 | . . 3 ⊢ (𝑀 gcd 𝑁) = (𝑁 gcd 𝑀) |
20 | 9, 14, 19 | 3eqtr4i 2771 | . 2 ⊢ (𝑁 gcd 𝑅) = (𝑀 gcd 𝑁) |
21 | gcdi.5 | . 2 ⊢ (𝑁 gcd 𝑅) = 𝐺 | |
22 | 20, 21 | eqtr3i 2763 | 1 ⊢ (𝑀 gcd 𝑁) = 𝐺 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∈ wcel 2101 (class class class)co 7295 + caddc 10902 · cmul 10904 ℕ0cn0 12261 ℤcz 12347 gcd cgcd 16229 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2103 ax-9 2111 ax-10 2132 ax-11 2149 ax-12 2166 ax-ext 2704 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7608 ax-cnex 10955 ax-resscn 10956 ax-1cn 10957 ax-icn 10958 ax-addcl 10959 ax-addrcl 10960 ax-mulcl 10961 ax-mulrcl 10962 ax-mulcom 10963 ax-addass 10964 ax-mulass 10965 ax-distr 10966 ax-i2m1 10967 ax-1ne0 10968 ax-1rid 10969 ax-rnegex 10970 ax-rrecex 10971 ax-cnre 10972 ax-pre-lttri 10973 ax-pre-lttrn 10974 ax-pre-ltadd 10975 ax-pre-mulgt0 10976 ax-pre-sup 10977 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2063 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2884 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3222 df-reu 3223 df-rab 3224 df-v 3436 df-sbc 3719 df-csb 3835 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3908 df-nul 4260 df-if 4463 df-pw 4538 df-sn 4565 df-pr 4567 df-op 4571 df-uni 4842 df-iun 4929 df-br 5078 df-opab 5140 df-mpt 5161 df-tr 5195 df-id 5491 df-eprel 5497 df-po 5505 df-so 5506 df-fr 5546 df-we 5548 df-xp 5597 df-rel 5598 df-cnv 5599 df-co 5600 df-dm 5601 df-rn 5602 df-res 5603 df-ima 5604 df-pred 6206 df-ord 6273 df-on 6274 df-lim 6275 df-suc 6276 df-iota 6399 df-fun 6449 df-fn 6450 df-f 6451 df-f1 6452 df-fo 6453 df-f1o 6454 df-fv 6455 df-riota 7252 df-ov 7298 df-oprab 7299 df-mpo 7300 df-om 7733 df-2nd 7852 df-frecs 8117 df-wrecs 8148 df-recs 8222 df-rdg 8261 df-er 8518 df-en 8754 df-dom 8755 df-sdom 8756 df-sup 9229 df-inf 9230 df-pnf 11039 df-mnf 11040 df-xr 11041 df-ltxr 11042 df-le 11043 df-sub 11235 df-neg 11236 df-div 11661 df-nn 12002 df-2 12064 df-3 12065 df-n0 12262 df-z 12348 df-uz 12611 df-rp 12759 df-seq 13750 df-exp 13811 df-cj 14838 df-re 14839 df-im 14840 df-sqrt 14974 df-abs 14975 df-dvds 15992 df-gcd 16230 |
This theorem is referenced by: 1259lem5 16864 2503lem3 16868 4001lem4 16873 |
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