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| Mirrors > Home > MPE Home > Th. List > negdvdsb | Structured version Visualization version 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 23 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ)) | |
| 2 | znegcl 12771 | . . . 4 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℤ) | |
| 3 | 2 | anim1i 627 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ( -𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ)) |
| 4 | znegcl 12771 | . . . 4 ⊢ (𝑥 ∈ ℤ → -𝑥 ∈ ℤ) | |
| 5 | 4 | adantl 487 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → -𝑥 ∈ ℤ) |
| 6 | zcn 12738 | . . . . . . 7 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ) | |
| 7 | zcn 12738 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 8 | mul2neg 11794 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) → ( -𝑥 · -𝑀) = (𝑥 · 𝑀)) | |
| 9 | 6, 7, 8 | syl2anr 609 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ( -𝑥 · -𝑀) = (𝑥 · 𝑀)) |
| 10 | 9 | adantlr 728 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ( -𝑥 · -𝑀) = (𝑥 · 𝑀)) |
| 11 | 10 | eqeq1d 2765 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → (( -𝑥 · -𝑀) = 𝑁 ↔ (𝑥 · 𝑀) = 𝑁)) |
| 12 | 11 | biimprd 251 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) = 𝑁 → ( -𝑥 · -𝑀) = 𝑁)) |
| 13 | 1, 3, 5, 12 | dvds1lem 16481 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 → -𝑀 ∥ 𝑁)) |
| 14 | mulneg12 11793 | . . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ) → ( -𝑥 · 𝑀) = (𝑥 · -𝑀)) | |
| 15 | 6, 7, 14 | syl2anr 609 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ( -𝑥 · 𝑀) = (𝑥 · -𝑀)) |
| 16 | 15 | adantlr 728 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ( -𝑥 · 𝑀) = (𝑥 · -𝑀)) |
| 17 | 16 | eqeq1d 2765 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → (( -𝑥 · 𝑀) = 𝑁 ↔ (𝑥 · -𝑀) = 𝑁)) |
| 18 | 17 | biimprd 251 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · -𝑀) = 𝑁 → ( -𝑥 · 𝑀) = 𝑁)) |
| 19 | 3, 1, 5, 18 | dvds1lem 16481 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ( -𝑀 ∥ 𝑁 → 𝑀 ∥ 𝑁)) |
| 20 | 13, 19 | impbid 215 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ -𝑀 ∥ 𝑁)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2147 class class class wbr 5108 (class class class)co 7451 ℂcc 11237 · cmul 11244 -cneg 11581 ℤcz 12733 ∥ cdvds 16466 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-er 8755 df-en 9012 df-dom 9013 df-sdom 9014 df-pnf 11384 df-mnf 11385 df-ltxr 11387 df-sub 11582 df-neg 11583 df-nn 12376 df-z 12734 df-dvds 16467 |
| This theorem is used by: absdvdsb 16488 3dvds 16545 lcmneg 16822 |
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