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| Mirrors > Home > MPE Home > Th. List > dvds0lem | Structured version Visualization version GIF version | ||
| Description: A lemma to assist theorems of ∥ with no antecedents. (Contributed by Paul Chapman, 21-Mar-2011.) |
| Ref | Expression |
|---|---|
| dvds0lem | ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 · 𝑀) = 𝑁) → 𝑀 ∥ 𝑁) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq1 7365 | . . . . . . . . 9 ⊢ (𝑥 = 𝐾 → (𝑥 · 𝑀) = (𝐾 · 𝑀)) | |
| 2 | 1 | eqeq1d 2739 | . . . . . . . 8 ⊢ (𝑥 = 𝐾 → ((𝑥 · 𝑀) = 𝑁 ↔ (𝐾 · 𝑀) = 𝑁)) |
| 3 | 2 | rspcev 3565 | . . . . . . 7 ⊢ ((𝐾 ∈ ℤ ∧ (𝐾 · 𝑀) = 𝑁) → ∃𝑥 ∈ ℤ (𝑥 · 𝑀) = 𝑁) |
| 4 | 3 | adantl 481 | . . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ (𝐾 · 𝑀) = 𝑁)) → ∃𝑥 ∈ ℤ (𝑥 · 𝑀) = 𝑁) |
| 5 | divides 16212 | . . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑥 ∈ ℤ (𝑥 · 𝑀) = 𝑁)) | |
| 6 | 5 | adantr 480 | . . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ (𝐾 · 𝑀) = 𝑁)) → (𝑀 ∥ 𝑁 ↔ ∃𝑥 ∈ ℤ (𝑥 · 𝑀) = 𝑁)) |
| 7 | 4, 6 | mpbird 257 | . . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 ∈ ℤ ∧ (𝐾 · 𝑀) = 𝑁)) → 𝑀 ∥ 𝑁) |
| 8 | 7 | expr 456 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝐾 ∈ ℤ) → ((𝐾 · 𝑀) = 𝑁 → 𝑀 ∥ 𝑁)) |
| 9 | 8 | 3impa 1110 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → ((𝐾 · 𝑀) = 𝑁 → 𝑀 ∥ 𝑁)) |
| 10 | 9 | 3comr 1126 | . 2 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 · 𝑀) = 𝑁 → 𝑀 ∥ 𝑁)) |
| 11 | 10 | imp 406 | 1 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 · 𝑀) = 𝑁) → 𝑀 ∥ 𝑁) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ∃wrex 3062 class class class wbr 5086 (class class class)co 7358 · cmul 11032 ℤcz 12513 ∥ cdvds 16210 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5231 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-iota 6446 df-fv 6498 df-ov 7361 df-dvds 16211 |
| This theorem is referenced by: iddvds 16227 1dvds 16228 dvds0 16229 dvdsmul1 16235 dvdsmul2 16236 divalgmod 16364 isprm5 16666 ex-dvds 30546 fldextrspundgdvds 33846 constrext2chnlem 33915 oddpwdc 34519 inductionexd 44597 |
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