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Theorem eqvrelid 39601
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 39564 . . 3 Disj I
21disjimi 39594 . 2 EqvRel ≀ I
3 cossid 39279 . . 3 ≀ I = I
43eqvreleqi 39396 . 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 5557  ccoss 38892   EqvRel weqvrel 38909
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 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2737  ax-sep 5259  ax-pr 5406
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 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ral 3082  df-rex 3092  df-rab 3419  df-v 3459  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4287  df-if 4490  df-sn 4592  df-pr 4594  df-op 4598  df-br 5112  df-opab 5176  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-coss 39210  df-refrel 39301  df-cnvrefrel 39316  df-symrel 39333  df-trrel 39367  df-eqvrel 39378  df-disjALTV 39499
This theorem is used by: (None)
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