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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 7412 | . . . . . . . . 9 ⊢ (𝑥 = 𝐾 → (𝑥 · 𝑀) = (𝐾 · 𝑀)) | |
| 2 | 1 | eqeq1d 2737 | . . . . . . . 8 ⊢ (𝑥 = 𝐾 → ((𝑥 · 𝑀) = 𝑁 ↔ (𝐾 · 𝑀) = 𝑁)) |
| 3 | 2 | rspcev 3601 | . . . . . . 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 16274 | . . . . . . 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 1109 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → ((𝐾 · 𝑀) = 𝑁 → 𝑀 ∥ 𝑁)) |
| 10 | 9 | 3comr 1125 | . 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 1086 = wceq 1540 ∈ wcel 2108 ∃wrex 3060 class class class wbr 5119 (class class class)co 7405 · cmul 11134 ℤcz 12588 ∥ cdvds 16272 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pr 5402 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2065 df-clab 2714 df-cleq 2727 df-clel 2809 df-ral 3052 df-rex 3061 df-rab 3416 df-v 3461 df-dif 3929 df-un 3931 df-ss 3943 df-nul 4309 df-if 4501 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-br 5120 df-opab 5182 df-iota 6484 df-fv 6539 df-ov 7408 df-dvds 16273 |
| This theorem is referenced by: iddvds 16289 1dvds 16290 dvds0 16291 dvdsmul1 16297 dvdsmul2 16298 divalgmod 16425 isprm5 16726 ex-dvds 30437 fldextrspundgdvds 33722 constrext2chnlem 33784 oddpwdc 34386 inductionexd 44179 |
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