| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > negdvdsb | GIF version | ||
| Description: An integer divides another iff its negation does. (Contributed by Paul Chapman, 21-Mar-2011.) |
| Ref | Expression |
|---|---|
| negdvdsb | ⊢ ((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 9686 | . . . 4 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℤ) | |
| 3 | 2 | anim1i 340 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ( -𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ)) |
| 4 | znegcl 9686 | . . . 4 ⊢ (𝑥 ∈ ℤ → -𝑥 ∈ ℤ) | |
| 5 | 4 | adantl 277 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → -𝑥 ∈ ℤ) |
| 6 | zcn 9660 | . . . . . . 7 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ) | |
| 7 | zcn 9660 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 8 | mul2neg 8732 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) → ( -𝑥 · -𝑀) = (𝑥 · 𝑀)) | |
| 9 | 6, 7, 8 | syl2anr 290 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ( -𝑥 · -𝑀) = (𝑥 · 𝑀)) |
| 10 | 9 | adantlr 481 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ( -𝑥 · -𝑀) = (𝑥 · 𝑀)) |
| 11 | 10 | eqeq1d 2247 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → (( -𝑥 · -𝑀) = 𝑁 ↔ (𝑥 · 𝑀) = 𝑁)) |
| 12 | 11 | biimprd 158 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) = 𝑁 → ( -𝑥 · -𝑀) = 𝑁)) |
| 13 | 1, 3, 5, 12 | dvds1lem 12594 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 → -𝑀 ∥ 𝑁)) |
| 14 | mulneg12 8731 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) → ( -𝑥 · 𝑀) = (𝑥 · -𝑀)) | |
| 15 | 6, 7, 14 | syl2anr 290 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ( -𝑥 · 𝑀) = (𝑥 · -𝑀)) |
| 16 | 15 | adantlr 481 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ( -𝑥 · 𝑀) = (𝑥 · -𝑀)) |
| 17 | 16 | eqeq1d 2247 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → (( -𝑥 · 𝑀) = 𝑁 ↔ (𝑥 · -𝑀) = 𝑁)) |
| 18 | 17 | biimprd 158 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · -𝑀) = 𝑁 → ( -𝑥 · 𝑀) = 𝑁)) |
| 19 | 3, 1, 5, 18 | dvds1lem 12594 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ( -𝑀 ∥ 𝑁 → 𝑀 ∥ 𝑁)) |
| 20 | 13, 19 | impbid 129 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ -𝑀 ∥ 𝑁)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1402 ∈ wcel 2209 class class class wbr 4131 (class class class)co 6088 ℂcc 8183 · cmul 8190 -cneg 8505 ℤcz 9655 ∥ cdvds 12579 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-addcom 8285 ax-mulcom 8286 ax-addass 8287 ax-distr 8289 ax-i2m1 8290 ax-0lt1 8291 ax-0id 8293 ax-rnegex 8294 ax-cnre 8296 ax-pre-ltirr 8297 ax-pre-ltwlin 8298 ax-pre-lttrn 8299 ax-pre-ltadd 8301 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-opab 4194 df-id 4440 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-iota 5340 df-fun 5382 df-fv 5388 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-pnf 8368 df-mnf 8369 df-xr 8370 df-ltxr 8371 df-le 8372 df-sub 8506 df-neg 8507 df-inn 9314 df-z 9656 df-dvds 12580 |
| This theorem is used by: absdvdsb 12601 zdvdsdc 12604 3dvds 12656 bezoutlemzz 12804 lcmneg 12877 |
| Copyright terms: Public domain | W3C validator |