Theorem dfrel3 6198

Description: Alternate definition of relation. (Contributed by NM, 14-May-2008.)

Assertion

Ref	Expression
dfrel3	⊢ (Rel 𝑅 ↔ (𝑅 ↾ V) = 𝑅)

Proof of Theorem dfrel3

Step	Hyp	Ref	Expression
1		dfrel2 6188	. 2 ⊢ (Rel 𝑅 ↔ ◡◡𝑅 = 𝑅)
2		cnvcnv2 6192	. . 3 ⊢ ◡◡𝑅 = (𝑅 ↾ V)
3	2	eqeq1i 2774	. 2 ⊢ (◡◡𝑅 = 𝑅 ↔ (𝑅 ↾ V) = 𝑅)
4	1, 3	bitri 278	1 ⊢ (Rel 𝑅 ↔ (𝑅 ↾ V) = 𝑅)

Syntax hints:   ↔ wb 209   = wceq 1567  Vcvv 3463  ^◡ccnv 5661   ↾ cres 5664  Rel wrel 5667

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-ext 2741  ax-sep 5261  ax-pr 5405

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-sb 2098  df-clab 2748  df-cleq 2761  df-clel 2844  df-rab 3424  df-v 3465  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-br 5114  df-opab 5178  df-xp 5668  df-rel 5669  df-cnv 5670  df-res 5674

This theorem is referenced by:  elid  6199  cocnvcnv2  6261  f1ovi  6862  ttrclco  9686  dfsucmap3  39001