Theorem dfrel5 34114

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

Step	Hyp	Ref	Expression
1		dfrel2 5583	. 2 ⊢ (Rel 𝑅 ↔ ◡◡𝑅 = 𝑅)
2		resdm2 5624	. . 3 ⊢ (𝑅 ↾ dom 𝑅) = ◡◡𝑅
3	2	eqeq1i 2627	. 2 ⊢ ((𝑅 ↾ dom 𝑅) = 𝑅 ↔ ◡◡𝑅 = 𝑅)
4	1, 3	bitr4i 267	1 ⊢ (Rel 𝑅 ↔ (𝑅 ↾ dom 𝑅) = 𝑅)

Syntax hints:   ↔ wb 196   = wceq 1483  ^◡ccnv 5113  dom cdm 5114   ↾ cres 5116  Rel wrel 5119

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-xp 5120  df-rel 5121  df-cnv 5122  df-dm 5124  df-rn 5125  df-res 5126

This theorem is referenced by:  dfrel6  34115  cnvresrn  34116