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Mirrors > Home > MPE Home > Th. List > dvdsdivcl | Structured version Visualization version GIF version |
Description: The complement of a divisor of 𝑁 is also a divisor of 𝑁. (Contributed by Mario Carneiro, 2-Jul-2015.) (Proof shortened by AV, 9-Aug-2021.) |
Ref | Expression |
---|---|
dvdsdivcl | ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁}) → (𝑁 / 𝐴) ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq1 5081 | . . . . 5 ⊢ (𝑥 = 𝐴 → (𝑥 ∥ 𝑁 ↔ 𝐴 ∥ 𝑁)) | |
2 | 1 | elrab 3625 | . . . 4 ⊢ (𝐴 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁} ↔ (𝐴 ∈ ℕ ∧ 𝐴 ∥ 𝑁)) |
3 | nndivdvds 15953 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ ℕ) → (𝐴 ∥ 𝑁 ↔ (𝑁 / 𝐴) ∈ ℕ)) | |
4 | 3 | biimpd 228 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ ℕ) → (𝐴 ∥ 𝑁 → (𝑁 / 𝐴) ∈ ℕ)) |
5 | 4 | expcom 413 | . . . . . . 7 ⊢ (𝐴 ∈ ℕ → (𝑁 ∈ ℕ → (𝐴 ∥ 𝑁 → (𝑁 / 𝐴) ∈ ℕ))) |
6 | 5 | com23 86 | . . . . . 6 ⊢ (𝐴 ∈ ℕ → (𝐴 ∥ 𝑁 → (𝑁 ∈ ℕ → (𝑁 / 𝐴) ∈ ℕ))) |
7 | 6 | imp 406 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐴 ∥ 𝑁) → (𝑁 ∈ ℕ → (𝑁 / 𝐴) ∈ ℕ)) |
8 | nnne0 11990 | . . . . . . 7 ⊢ (𝐴 ∈ ℕ → 𝐴 ≠ 0) | |
9 | 8 | anim1ci 615 | . . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐴 ∥ 𝑁) → (𝐴 ∥ 𝑁 ∧ 𝐴 ≠ 0)) |
10 | divconjdvds 16005 | . . . . . 6 ⊢ ((𝐴 ∥ 𝑁 ∧ 𝐴 ≠ 0) → (𝑁 / 𝐴) ∥ 𝑁) | |
11 | 9, 10 | syl 17 | . . . . 5 ⊢ ((𝐴 ∈ ℕ ∧ 𝐴 ∥ 𝑁) → (𝑁 / 𝐴) ∥ 𝑁) |
12 | 7, 11 | jctird 526 | . . . 4 ⊢ ((𝐴 ∈ ℕ ∧ 𝐴 ∥ 𝑁) → (𝑁 ∈ ℕ → ((𝑁 / 𝐴) ∈ ℕ ∧ (𝑁 / 𝐴) ∥ 𝑁))) |
13 | 2, 12 | sylbi 216 | . . 3 ⊢ (𝐴 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁} → (𝑁 ∈ ℕ → ((𝑁 / 𝐴) ∈ ℕ ∧ (𝑁 / 𝐴) ∥ 𝑁))) |
14 | 13 | impcom 407 | . 2 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁}) → ((𝑁 / 𝐴) ∈ ℕ ∧ (𝑁 / 𝐴) ∥ 𝑁)) |
15 | breq1 5081 | . . 3 ⊢ (𝑥 = (𝑁 / 𝐴) → (𝑥 ∥ 𝑁 ↔ (𝑁 / 𝐴) ∥ 𝑁)) | |
16 | 15 | elrab 3625 | . 2 ⊢ ((𝑁 / 𝐴) ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁} ↔ ((𝑁 / 𝐴) ∈ ℕ ∧ (𝑁 / 𝐴) ∥ 𝑁)) |
17 | 14, 16 | sylibr 233 | 1 ⊢ ((𝑁 ∈ ℕ ∧ 𝐴 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁}) → (𝑁 / 𝐴) ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑁}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2109 ≠ wne 2944 {crab 3069 class class class wbr 5078 (class class class)co 7268 0cc0 10855 / cdiv 11615 ℕcn 11956 ∥ cdvds 15944 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-2nd 7818 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-er 8472 df-en 8708 df-dom 8709 df-sdom 8710 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-nn 11957 df-z 12303 df-dvds 15945 |
This theorem is referenced by: dvdsflip 16007 fsumdvdsdiaglem 26313 fsumdvdsdiag 26314 fsumdvdscom 26315 muinv 26323 logsqvma 26671 logsqvma2 26672 selberg 26677 selberg34r 26700 pntsval2 26705 pntrlog2bndlem1 26706 |
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