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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 16346 | . . 3 ⊢ ∥ = {〈𝑥, 𝑦〉 ∣ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ) ∧ ∃𝑧 ∈ ℤ (𝑧 · 𝑥) = 𝑦)} | |
| 2 | opabssxp 5747 | . . 3 ⊢ {〈𝑥, 𝑦〉 ∣ ((𝑥 ∈ ℤ ∧ 𝑦 ∈ ℤ) ∧ ∃𝑧 ∈ ℤ (𝑧 · 𝑥) = 𝑦)} ⊆ (ℤ × ℤ) | |
| 3 | 1, 2 | eqsstri 3977 | . 2 ⊢ ∥ ⊆ (ℤ × ℤ) |
| 4 | 3 | brel 5720 | 1 ⊢ (𝑋 ∥ 𝑌 → (𝑋 ∈ ℤ ∧ 𝑌 ∈ ℤ)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∃wrex 3086 class class class wbr 5103 {copab 5167 × cxp 5653 (class class class)co 7414 · cmul 11132 ℤcz 12618 ∥ cdvds 16345 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 ax-sep 5251 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-xp 5661 df-dvds 16346 |
| This theorem is used by: dvdsmod0 16351 p1modz1 16352 dvdsmodexp 16353 dvdsaddre2b 16400 dvdsabseq 16406 divconjdvds 16408 evenelz 16429 4dvdseven 16466 dfgcd2 16639 dvdsmulgcd 16649 dvdsnprmd 16783 dvdszzq 16815 oddvdsi 19678 odmulg 19686 gexdvdsi 19713 dvdschrmulg 21744 nnproddivdvdsd 42869 lcmineqlem14 42911 aks6d1c6isolem3 43045 grpods 43063 nzss 45144 nzin 45145 |
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