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Mirrors > Home > ILE Home > Th. List > dvdssub2 | GIF version |
Description: If an integer divides a difference, then it divides one term iff it divides the other. (Contributed by Mario Carneiro, 13-Jul-2014.) |
Ref | Expression |
---|---|
dvdssub2 | ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∥ (𝑀 − 𝑁)) → (𝐾 ∥ 𝑀 ↔ 𝐾 ∥ 𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zsubcl 9265 | . . . . . . . 8 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 − 𝑁) ∈ ℤ) | |
2 | 1 | 3adant1 1015 | . . . . . . 7 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 − 𝑁) ∈ ℤ) |
3 | dvds2sub 11800 | . . . . . . 7 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ (𝑀 − 𝑁) ∈ ℤ) → ((𝐾 ∥ 𝑀 ∧ 𝐾 ∥ (𝑀 − 𝑁)) → 𝐾 ∥ (𝑀 − (𝑀 − 𝑁)))) | |
4 | 2, 3 | syld3an3 1283 | . . . . . 6 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 ∥ 𝑀 ∧ 𝐾 ∥ (𝑀 − 𝑁)) → 𝐾 ∥ (𝑀 − (𝑀 − 𝑁)))) |
5 | 4 | ancomsd 269 | . . . . 5 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑀) → 𝐾 ∥ (𝑀 − (𝑀 − 𝑁)))) |
6 | 5 | imp 124 | . . . 4 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑀)) → 𝐾 ∥ (𝑀 − (𝑀 − 𝑁))) |
7 | zcn 9229 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
8 | zcn 9229 | . . . . . . 7 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
9 | nncan 8160 | . . . . . . 7 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (𝑀 − (𝑀 − 𝑁)) = 𝑁) | |
10 | 7, 8, 9 | syl2an 289 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 − (𝑀 − 𝑁)) = 𝑁) |
11 | 10 | 3adant1 1015 | . . . . 5 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 − (𝑀 − 𝑁)) = 𝑁) |
12 | 11 | adantr 276 | . . . 4 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑀)) → (𝑀 − (𝑀 − 𝑁)) = 𝑁) |
13 | 6, 12 | breqtrd 4024 | . . 3 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑀)) → 𝐾 ∥ 𝑁) |
14 | 13 | expr 375 | . 2 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∥ (𝑀 − 𝑁)) → (𝐾 ∥ 𝑀 → 𝐾 ∥ 𝑁)) |
15 | dvds2add 11799 | . . . . . 6 ⊢ ((𝐾 ∈ ℤ ∧ (𝑀 − 𝑁) ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑁) → 𝐾 ∥ ((𝑀 − 𝑁) + 𝑁))) | |
16 | 2, 15 | syld3an2 1285 | . . . . 5 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑁) → 𝐾 ∥ ((𝑀 − 𝑁) + 𝑁))) |
17 | 16 | imp 124 | . . . 4 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑁)) → 𝐾 ∥ ((𝑀 − 𝑁) + 𝑁)) |
18 | npcan 8140 | . . . . . . 7 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → ((𝑀 − 𝑁) + 𝑁) = 𝑀) | |
19 | 7, 8, 18 | syl2an 289 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑀 − 𝑁) + 𝑁) = 𝑀) |
20 | 19 | 3adant1 1015 | . . . . 5 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑀 − 𝑁) + 𝑁) = 𝑀) |
21 | 20 | adantr 276 | . . . 4 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑁)) → ((𝑀 − 𝑁) + 𝑁) = 𝑀) |
22 | 17, 21 | breqtrd 4024 | . . 3 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∥ (𝑀 − 𝑁) ∧ 𝐾 ∥ 𝑁)) → 𝐾 ∥ 𝑀) |
23 | 22 | expr 375 | . 2 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∥ (𝑀 − 𝑁)) → (𝐾 ∥ 𝑁 → 𝐾 ∥ 𝑀)) |
24 | 14, 23 | impbid 129 | 1 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∥ (𝑀 − 𝑁)) → (𝐾 ∥ 𝑀 ↔ 𝐾 ∥ 𝑁)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 978 = wceq 1353 ∈ wcel 2146 class class class wbr 3998 (class class class)co 5865 ℂcc 7784 + caddc 7789 − cmin 8102 ℤcz 9224 ∥ cdvds 11761 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1445 ax-7 1446 ax-gen 1447 ax-ie1 1491 ax-ie2 1492 ax-8 1502 ax-10 1503 ax-11 1504 ax-i12 1505 ax-bndl 1507 ax-4 1508 ax-17 1524 ax-i9 1528 ax-ial 1532 ax-i5r 1533 ax-13 2148 ax-14 2149 ax-ext 2157 ax-sep 4116 ax-pow 4169 ax-pr 4203 ax-un 4427 ax-setind 4530 ax-cnex 7877 ax-resscn 7878 ax-1cn 7879 ax-1re 7880 ax-icn 7881 ax-addcl 7882 ax-addrcl 7883 ax-mulcl 7884 ax-addcom 7886 ax-mulcom 7887 ax-addass 7888 ax-distr 7890 ax-i2m1 7891 ax-0lt1 7892 ax-0id 7894 ax-rnegex 7895 ax-cnre 7897 ax-pre-ltirr 7898 ax-pre-ltwlin 7899 ax-pre-lttrn 7900 ax-pre-ltadd 7902 |
This theorem depends on definitions: df-bi 117 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1459 df-sb 1761 df-eu 2027 df-mo 2028 df-clab 2162 df-cleq 2168 df-clel 2171 df-nfc 2306 df-ne 2346 df-nel 2441 df-ral 2458 df-rex 2459 df-reu 2460 df-rab 2462 df-v 2737 df-sbc 2961 df-dif 3129 df-un 3131 df-in 3133 df-ss 3140 df-pw 3574 df-sn 3595 df-pr 3596 df-op 3598 df-uni 3806 df-int 3841 df-br 3999 df-opab 4060 df-id 4287 df-xp 4626 df-rel 4627 df-cnv 4628 df-co 4629 df-dm 4630 df-iota 5170 df-fun 5210 df-fv 5216 df-riota 5821 df-ov 5868 df-oprab 5869 df-mpo 5870 df-pnf 7968 df-mnf 7969 df-xr 7970 df-ltxr 7971 df-le 7972 df-sub 8104 df-neg 8105 df-inn 8891 df-n0 9148 df-z 9225 df-dvds 11762 |
This theorem is referenced by: dvdsadd 11810 2sqlem8 13952 |
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