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| Mirrors > Home > MPE Home > Th. List > dvdszrcl | Structured version Visualization version GIF version | ||
| Description: Reverse closure for the divisibility relation. (Contributed by Stefan O'Rear, 5-Sep-2015.) |
| Ref | Expression |
|---|---|
| dvdszrcl | ⊢ (𝑋 ∥ 𝑌 → (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-dvds 16178 | . . 3 ⊢ ∥ = {〈𝑥, 𝑦〉 ∣ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ) ∧ ∃𝑧 ∈ ℤ (𝑧 · 𝑥) = 𝑦)} | |
| 2 | opabssxp 5714 | . . 3 ⊢ {〈𝑥, 𝑦〉 ∣ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ) ∧ ∃𝑧 ∈ ℤ (𝑧 · 𝑥) = 𝑦)} ⊆ (ℤ × ℤ) | |
| 3 | 1, 2 | eqsstri 3978 | . 2 ⊢ ∥ ⊆ (ℤ × ℤ) |
| 4 | 3 | brel 5687 | 1 ⊢ (𝑋 ∥ 𝑌 → (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ∃wrex 3058 class class class wbr 5096 {copab 5158 × cxp 5620 (class class class)co 7356 · cmul 11029 ℤcz 12486 ∥ cdvds 16177 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-br 5097 df-opab 5159 df-xp 5628 df-dvds 16178 |
| This theorem is referenced by: dvdsmod0 16183 p1modz1 16184 dvdsmodexp 16185 dvdsaddre2b 16232 dvdsabseq 16238 divconjdvds 16240 evenelz 16261 4dvdseven 16298 dfgcd2 16471 dvdsmulgcd 16481 dvdsnprmd 16615 dvdszzq 16646 oddvdsi 19475 odmulg 19483 gexdvdsi 19510 dvdschrmulg 21481 nnproddivdvdsd 42193 lcmineqlem14 42235 aks6d1c6isolem3 42369 grpods 42387 nzss 44500 nzin 44501 |
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