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Mirrors > Home > ILE Home > Th. List > dvdsnegb | GIF version |
Description: An integer divides another iff it divides its negation. (Contributed by Paul Chapman, 21-Mar-2011.) |
Ref | Expression |
---|---|
dvdsnegb | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ 𝑀 ∥ -𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ)) | |
2 | znegcl 9177 | . . . 4 ⊢ (𝑁 ∈ ℤ → -𝑁 ∈ ℤ) | |
3 | 2 | anim2i 340 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∈ ℤ ∧ -𝑁 ∈ ℤ)) |
4 | znegcl 9177 | . . . 4 ⊢ (𝑥 ∈ ℤ → -𝑥 ∈ ℤ) | |
5 | 4 | adantl 275 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → -𝑥 ∈ ℤ) |
6 | zcn 9151 | . . . . 5 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ) | |
7 | zcn 9151 | . . . . 5 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
8 | mulneg1 8249 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) → (-𝑥 · 𝑀) = -(𝑥 · 𝑀)) | |
9 | negeq 8047 | . . . . . . 7 ⊢ ((𝑥 · 𝑀) = 𝑁 → -(𝑥 · 𝑀) = -𝑁) | |
10 | 9 | eqeq2d 2166 | . . . . . 6 ⊢ ((𝑥 · 𝑀) = 𝑁 → ((-𝑥 · 𝑀) = -(𝑥 · 𝑀) ↔ (-𝑥 · 𝑀) = -𝑁)) |
11 | 8, 10 | syl5ibcom 154 | . . . . 5 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) → ((𝑥 · 𝑀) = 𝑁 → (-𝑥 · 𝑀) = -𝑁)) |
12 | 6, 7, 11 | syl2anr 288 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) = 𝑁 → (-𝑥 · 𝑀) = -𝑁)) |
13 | 12 | adantlr 469 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) = 𝑁 → (-𝑥 · 𝑀) = -𝑁)) |
14 | 1, 3, 5, 13 | dvds1lem 11671 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 → 𝑀 ∥ -𝑁)) |
15 | zcn 9151 | . . . . . 6 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
16 | negeq 8047 | . . . . . . . . . 10 ⊢ ((𝑥 · 𝑀) = -𝑁 → -(𝑥 · 𝑀) = --𝑁) | |
17 | negneg 8104 | . . . . . . . . . 10 ⊢ (𝑁 ∈ ℂ → --𝑁 = 𝑁) | |
18 | 16, 17 | sylan9eqr 2209 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℂ ∧ (𝑥 · 𝑀) = -𝑁) → -(𝑥 · 𝑀) = 𝑁) |
19 | 8, 18 | sylan9eq 2207 | . . . . . . . 8 ⊢ (((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) ∧ (𝑁 ∈ ℂ ∧ (𝑥 · 𝑀) = -𝑁)) → (-𝑥 · 𝑀) = 𝑁) |
20 | 19 | expr 373 | . . . . . . 7 ⊢ (((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) ∧ 𝑁 ∈ ℂ) → ((𝑥 · 𝑀) = -𝑁 → (-𝑥 · 𝑀) = 𝑁)) |
21 | 20 | 3impa 1177 | . . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → ((𝑥 · 𝑀) = -𝑁 → (-𝑥 · 𝑀) = 𝑁)) |
22 | 6, 7, 15, 21 | syl3an 1259 | . . . . 5 ⊢ ((𝑥 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑥 · 𝑀) = -𝑁 → (-𝑥 · 𝑀) = 𝑁)) |
23 | 22 | 3coml 1189 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) = -𝑁 → (-𝑥 · 𝑀) = 𝑁)) |
24 | 23 | 3expa 1182 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) = -𝑁 → (-𝑥 · 𝑀) = 𝑁)) |
25 | 3, 1, 5, 24 | dvds1lem 11671 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ -𝑁 → 𝑀 ∥ 𝑁)) |
26 | 14, 25 | impbid 128 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ 𝑀 ∥ -𝑁)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1332 ∈ wcel 2125 class class class wbr 3961 (class class class)co 5814 ℂcc 7709 · cmul 7716 -cneg 8026 ℤcz 9146 ∥ cdvds 11660 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1481 ax-10 1482 ax-11 1483 ax-i12 1484 ax-bndl 1486 ax-4 1487 ax-17 1503 ax-i9 1507 ax-ial 1511 ax-i5r 1512 ax-13 2127 ax-14 2128 ax-ext 2136 ax-sep 4078 ax-pow 4130 ax-pr 4164 ax-un 4388 ax-setind 4490 ax-cnex 7802 ax-resscn 7803 ax-1cn 7804 ax-1re 7805 ax-icn 7806 ax-addcl 7807 ax-addrcl 7808 ax-mulcl 7809 ax-addcom 7811 ax-mulcom 7812 ax-addass 7813 ax-distr 7815 ax-i2m1 7816 ax-0lt1 7817 ax-0id 7819 ax-rnegex 7820 ax-cnre 7822 ax-pre-ltirr 7823 ax-pre-ltwlin 7824 ax-pre-lttrn 7825 ax-pre-ltadd 7827 |
This theorem depends on definitions: df-bi 116 df-3or 964 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1740 df-eu 2006 df-mo 2007 df-clab 2141 df-cleq 2147 df-clel 2150 df-nfc 2285 df-ne 2325 df-nel 2420 df-ral 2437 df-rex 2438 df-reu 2439 df-rab 2441 df-v 2711 df-sbc 2934 df-dif 3100 df-un 3102 df-in 3104 df-ss 3111 df-pw 3541 df-sn 3562 df-pr 3563 df-op 3565 df-uni 3769 df-int 3804 df-br 3962 df-opab 4022 df-id 4248 df-xp 4585 df-rel 4586 df-cnv 4587 df-co 4588 df-dm 4589 df-iota 5128 df-fun 5165 df-fv 5171 df-riota 5770 df-ov 5817 df-oprab 5818 df-mpo 5819 df-pnf 7893 df-mnf 7894 df-xr 7895 df-ltxr 7896 df-le 7897 df-sub 8027 df-neg 8028 df-inn 8813 df-z 9147 df-dvds 11661 |
This theorem is referenced by: dvdsabsb 11679 dvdssub 11705 dvdsadd2b 11707 gcdneg 11837 bezoutlemaz 11858 bezoutlembz 11859 |
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