Theorem reldvdsr 20292

Description: The divides relation is a relation. (Contributed by Mario Carneiro, 1-Dec-2014.)

Hypothesis

Ref	Expression
reldvdsr.1	⊢ ∥ = (∥r‘𝑅)

Assertion

Ref	Expression
reldvdsr	⊢ Rel ∥

Proof of Theorem reldvdsr

Dummy variables 𝑥 𝑤 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-dvdsr 20289	. . 3 ⊢ ∥r = (𝑤 ∈ V ↦ {⟨𝑥, 𝑦⟩ ∣ (𝑥 ∈ (Base‘𝑤) ∧ ∃𝑧 ∈ (Base‘𝑤)(𝑧(.r‘𝑤)𝑥) = 𝑦)})
2	1	relmptopab 7665	. 2 ⊢ Rel (∥r‘𝑅)
3		reldvdsr.1	. . 3 ⊢ ∥ = (∥r‘𝑅)
4	3	releqi 5773	. 2 ⊢ (Rel ∥ ↔ Rel (∥r‘𝑅))
5	2, 4	mpbir 230	1 ⊢ Rel ∥

Syntax hints:   ∧ wa 395   = wceq 1534   ∈ wcel 2099  ∃wrex 3065  Vcvv 3469  Rel wrel 5677  ‘cfv 6542  (class class class)co 7414  Basecbs 17173  ._rcmulr 17227  ∥_rcdsr 20286

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2101  ax-9 2109  ax-10 2130  ax-11 2147  ax-12 2164  ax-ext 2698  ax-sep 5293  ax-nul 5300  ax-pr 5423

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 847  df-3an 1087  df-tru 1537  df-fal 1547  df-ex 1775  df-nf 1779  df-sb 2061  df-mo 2529  df-eu 2558  df-clab 2705  df-cleq 2719  df-clel 2805  df-nfc 2880  df-ral 3057  df-rex 3066  df-rab 3428  df-v 3471  df-sbc 3775  df-csb 3890  df-dif 3947  df-un 3949  df-in 3951  df-ss 3961  df-nul 4319  df-if 4525  df-sn 4625  df-pr 4627  df-op 4631  df-uni 4904  df-br 5143  df-opab 5205  df-mpt 5226  df-id 5570  df-xp 5678  df-rel 5679  df-cnv 5680  df-co 5681  df-dm 5682  df-rn 5683  df-res 5684  df-ima 5685  df-iota 6494  df-fun 6544  df-fv 6550  df-dvdsr 20289

This theorem is referenced by:  dvdsr  20294  isunit  20305  subrgdvds  20518