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Theorem gcdmultipled 16504

Description: The greatest common divisor of a nonnegative integer 𝑀 and a multiple of it is 𝑀 itself. (Contributed by Rohan Ridenour, 3-Aug-2023.)

**Hypotheses**
Ref	Expression
gcdmultipled.1	⊢ (𝜑 → 𝑀 ∈ ℕ₀)
gcdmultipled.2	⊢ (𝜑 → 𝑁 ∈ ℤ)

**Assertion**
Ref	Expression
gcdmultipled	⊢ (𝜑 → (𝑀 gcd (𝑁 · 𝑀)) = 𝑀)

**Proof of Theorem gcdmultipled**
Step	Hyp	Ref	Expression
1		gcdmultipled.2	. . 3 ⊢ (𝜑 → 𝑁 ∈ ℤ)
2		gcdmultipled.1	. . . 4 ⊢ (𝜑 → 𝑀 ∈ ℕ₀)
3	2	nn0zd 12609	. . 3 ⊢ (𝜑 → 𝑀 ∈ ℤ)
4		0zd 12595	. . 3 ⊢ (𝜑 → 0 ∈ ℤ)
5		gcdaddm 16494	. . 3 ⊢ ((𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 0 ∈ ℤ) → (𝑀 gcd 0) = (𝑀 gcd (0 + (𝑁 · 𝑀))))
6	1, 3, 4, 5	syl3anc 1368	. 2 ⊢ (𝜑 → (𝑀 gcd 0) = (𝑀 gcd (0 + (𝑁 · 𝑀))))
7		nn0gcdid0 16490	. . 3 ⊢ (𝑀 ∈ ℕ₀ → (𝑀 gcd 0) = 𝑀)
8	2, 7	syl 17	. 2 ⊢ (𝜑 → (𝑀 gcd 0) = 𝑀)
9	1, 3	zmulcld 12697	. . . . 5 ⊢ (𝜑 → (𝑁 · 𝑀) ∈ ℤ)
10	9	zcnd 12692	. . . 4 ⊢ (𝜑 → (𝑁 · 𝑀) ∈ ℂ)
11	10	addlidd 11440	. . 3 ⊢ (𝜑 → (0 + (𝑁 · 𝑀)) = (𝑁 · 𝑀))
12	11	oveq2d 7429	. 2 ⊢ (𝜑 → (𝑀 gcd (0 + (𝑁 · 𝑀))) = (𝑀 gcd (𝑁 · 𝑀)))
13	6, 8, 12	3eqtr3rd 2774	1 ⊢ (𝜑 → (𝑀 gcd (𝑁 · 𝑀)) = 𝑀)

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1533 ∈ wcel 2098 (class class class)co 7413 0cc0 11133 + caddc 11136 · cmul 11138 ℕ₀cn0 12497 ℤcz 12583 gcd cgcd 16463

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 2166 ax-ext 2696 ax-sep 5295 ax-nul 5302 ax-pow 5360 ax-pr 5424 ax-un 7735 ax-cnex 11189 ax-resscn 11190 ax-1cn 11191 ax-icn 11192 ax-addcl 11193 ax-addrcl 11194 ax-mulcl 11195 ax-mulrcl 11196 ax-mulcom 11197 ax-addass 11198 ax-mulass 11199 ax-distr 11200 ax-i2m1 11201 ax-1ne0 11202 ax-1rid 11203 ax-rnegex 11204 ax-rrecex 11205 ax-cnre 11206 ax-pre-lttri 11207 ax-pre-lttrn 11208 ax-pre-ltadd 11209 ax-pre-mulgt0 11210 ax-pre-sup 11211

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 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 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3961 df-nul 4320 df-if 4526 df-pw 4601 df-sn 4626 df-pr 4628 df-op 4632 df-uni 4905 df-iun 4994 df-br 5145 df-opab 5207 df-mpt 5228 df-tr 5262 df-id 5571 df-eprel 5577 df-po 5585 df-so 5586 df-fr 5628 df-we 5630 df-xp 5679 df-rel 5680 df-cnv 5681 df-co 5682 df-dm 5683 df-rn 5684 df-res 5685 df-ima 5686 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7369 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7866 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-er 8718 df-en 8958 df-dom 8959 df-sdom 8960 df-sup 9460 df-inf 9461 df-pnf 11275 df-mnf 11276 df-xr 11277 df-ltxr 11278 df-le 11279 df-sub 11471 df-neg 11472 df-div 11897 df-nn 12238 df-2 12300 df-3 12301 df-n0 12498 df-z 12584 df-uz 12848 df-rp 13002 df-seq 13994 df-exp 14054 df-cj 15073 df-re 15074 df-im 15075 df-sqrt 15209 df-abs 15210 df-dvds 16226 df-gcd 16464

This theorem is referenced by: gcdmultiplez 16505 dvdsgcdidd 16507

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