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Theorem eqvrelid 39824
Description: The identity relation is an equivalence relation. (Contributed by Peter Mazsa, 15-Apr-2019.) (Revised by Peter Mazsa, 31-Dec-2021.)
Assertion
Ref Expression
eqvrelid EqvRel I

Proof of Theorem eqvrelid
StepHypRef Expression
1 disjALTVid 39787 . . 3 Disj I
21disjimi 39817 . 2 EqvRel ≀ I
3 cossid 39502 . . 3 ≀ I = I
43eqvreleqi 39619 . 2 ( EqvRel ≀ I ↔ EqvRel I )
52, 4mpbi 233 1 EqvRel I
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   I cid 5545   ≀ ccoss 39115   EqvRel weqvrel 39132
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-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-sep 5249  ax-pr 5391
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-nf 1817  df-sb 2100  df-mo 2565  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  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-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-coss 39433  df-refrel 39524  df-cnvrefrel 39539  df-symrel 39556  df-trrel 39590  df-eqvrel 39601  df-disjALTV 39722
This theorem is used by: (None)
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