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Theorem dfrel5 37679
Description: Alternate definition of the relation predicate. (Contributed by Peter Mazsa, 6-Nov-2018.)
Assertion
Ref Expression
dfrel5 (Rel 𝑅 ↔ (𝑅 ↾ dom 𝑅) = 𝑅)

Proof of Theorem dfrel5
StepHypRef Expression
1 dfrel2 6188 . 2 (Rel 𝑅𝑅 = 𝑅)
2 resdm2 6230 . . 3 (𝑅 ↾ dom 𝑅) = 𝑅
32eqeq1i 2736 . 2 ((𝑅 ↾ dom 𝑅) = 𝑅𝑅 = 𝑅)
41, 3bitr4i 278 1 (Rel 𝑅 ↔ (𝑅 ↾ dom 𝑅) = 𝑅)
Colors of variables: wff setvar class
Syntax hints:  wb 205   = wceq 1540  ccnv 5675  dom cdm 5676  cres 5678  Rel wrel 5681
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 1912  ax-6 1970  ax-7 2010  ax-8 2107  ax-9 2115  ax-10 2136  ax-12 2170  ax-ext 2702  ax-sep 5299  ax-nul 5306  ax-pr 5427
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1781  df-nf 1785  df-sb 2067  df-clab 2709  df-cleq 2723  df-clel 2809  df-ral 3061  df-rex 3070  df-rab 3432  df-v 3475  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-nul 4323  df-if 4529  df-sn 4629  df-pr 4631  df-op 4635  df-br 5149  df-opab 5211  df-xp 5682  df-rel 5683  df-cnv 5684  df-dm 5686  df-rn 5687  df-res 5688
This theorem is referenced by:  dfrel6  37680  cnvresrn  37681  elrels5  37823
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