| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > dvds1 | Structured version Visualization version GIF version | ||
| Description: The only nonnegative integer that divides 1 is 1. (Contributed by Mario Carneiro, 2-Jul-2015.) |
| Ref | Expression |
|---|---|
| dvds1 | ⊢ (𝑀 ∈ ℕ0 → (𝑀 ∥ 1 ↔ 𝑀 = 1)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpl 488 | . . . 4 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ∥ 1) → 𝑀 ∈ ℕ0) | |
| 2 | 1nn0 12592 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 3 | 2 | a1i 11 | . . . 4 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ∥ 1) → 1 ∈ ℕ0) |
| 4 | simpr 490 | . . . 4 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ∥ 1) → 𝑀 ∥ 1) | |
| 5 | nn0z 12687 | . . . . . 6 ⊢ (𝑀 ∈ ℕ0 → 𝑀 ∈ ℤ) | |
| 6 | 1dvds 16408 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → 1 ∥ 𝑀) | |
| 7 | 5, 6 | syl 18 | . . . . 5 ⊢ (𝑀 ∈ ℕ0 → 1 ∥ 𝑀) |
| 8 | 7 | adantr 486 | . . . 4 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ∥ 1) → 1 ∥ 𝑀) |
| 9 | dvdseq 16452 | . . . 4 ⊢ (((𝑀 ∈ ℕ0 ∧ 1 ∈ ℕ0) ∧ (𝑀 ∥ 1 ∧ 1 ∥ 𝑀)) → 𝑀 = 1) | |
| 10 | 1, 3, 4, 8, 9 | syl22anc 852 | . . 3 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑀 ∥ 1) → 𝑀 = 1) |
| 11 | 10 | ex 418 | . 2 ⊢ (𝑀 ∈ ℕ0 → (𝑀 ∥ 1 → 𝑀 = 1)) |
| 12 | id 23 | . . 3 ⊢ (𝑀 = 1 → 𝑀 = 1) | |
| 13 | 1z 12696 | . . . 4 ⊢ 1 ∈ ℤ | |
| 14 | iddvds 16407 | . . . 4 ⊢ (1 ∈ ℤ → 1 ∥ 1) | |
| 15 | 13, 14 | ax-mp 5 | . . 3 ⊢ 1 ∥ 1 |
| 16 | 12, 15 | eqbrtrdi 5143 | . 2 ⊢ (𝑀 = 1 → 𝑀 ∥ 1) |
| 17 | 11, 16 | impbid1 228 | 1 ⊢ (𝑀 ∈ ℕ0 → (𝑀 ∥ 1 ↔ 𝑀 = 1)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 class class class wbr 5102 1c1 11173 ℕ0cn0 12576 ℤcz 12663 ∥ cdvds 16390 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-cnex 11228 ax-resscn 11229 ax-1cn 11230 ax-icn 11231 ax-addcl 11232 ax-addrcl 11233 ax-mulcl 11234 ax-mulrcl 11235 ax-mulcom 11236 ax-addass 11237 ax-mulass 11238 ax-distr 11239 ax-i2m1 11240 ax-1ne0 11241 ax-1rid 11242 ax-rnegex 11243 ax-rrecex 11244 ax-cnre 11245 ax-pre-lttri 11246 ax-pre-lttrn 11247 ax-pre-ltadd 11248 ax-pre-mulgt0 11249 ax-pre-sup 11250 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6293 df-ord 6354 df-on 6355 df-lim 6356 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7861 df-2nd 7985 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-er 8695 df-en 8952 df-dom 8953 df-sdom 8954 df-sup 9412 df-pnf 11317 df-mnf 11318 df-xr 11319 df-ltxr 11320 df-le 11321 df-sub 11515 df-neg 11516 df-div 11944 df-nn 12306 df-2 12375 df-3 12376 df-n0 12577 df-z 12664 df-uz 12936 df-rp 13091 df-seq 14114 df-exp 14174 df-cj 15234 df-re 15235 df-im 15236 df-sqrt 15370 df-abs 15371 df-dvds 16391 |
| This theorem is used by: rpmulgcd2 16794 rpmul 16797 1nprm 16817 nprmdvds1 16845 expnprm 17042 ablfacrp 20244 chrnzr 21798 znunit 21831 znrrg 21833 cos9thpiminplylem2 34349 lighneallem3 48614 |
| Copyright terms: Public domain | W3C validator |