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Theorem refrelredund2 35936
Description: The naive version of the definition of reflexive relation is redundant with respect to reflexive relation (see dfrefrel2 35820) in equivalence relation. (Contributed by Peter Mazsa, 25-Oct-2022.)
Assertion
Ref Expression
refrelredund2 redund ((( I ↾ dom 𝑅) ⊆ 𝑅 ∧ Rel 𝑅), RefRel 𝑅, EqvRel 𝑅)

Proof of Theorem refrelredund2
StepHypRef Expression
1 refrelredund4 35935 . 2 redund ((( I ↾ dom 𝑅) ⊆ 𝑅 ∧ Rel 𝑅), RefRel 𝑅, ( RefRel 𝑅 ∧ SymRel 𝑅))
2 df-eqvrel 35885 . . . 4 ( EqvRel 𝑅 ↔ ( RefRel 𝑅 ∧ SymRel 𝑅 ∧ TrRel 𝑅))
3 3simpa 1145 . . . 4 (( RefRel 𝑅 ∧ SymRel 𝑅 ∧ TrRel 𝑅) → ( RefRel 𝑅 ∧ SymRel 𝑅))
42, 3sylbi 220 . . 3 ( EqvRel 𝑅 → ( RefRel 𝑅 ∧ SymRel 𝑅))
54redundpim3 35930 . 2 ( redund ((( I ↾ dom 𝑅) ⊆ 𝑅 ∧ Rel 𝑅), RefRel 𝑅, ( RefRel 𝑅 ∧ SymRel 𝑅)) → redund ((( I ↾ dom 𝑅) ⊆ 𝑅 ∧ Rel 𝑅), RefRel 𝑅, EqvRel 𝑅))
61, 5ax-mp 5 1 redund ((( I ↾ dom 𝑅) ⊆ 𝑅 ∧ Rel 𝑅), RefRel 𝑅, EqvRel 𝑅)
Colors of variables: wff setvar class
Syntax hints:  wa 399  w3a 1084  wss 3918   I cid 5442  dom cdm 5538  cres 5540  Rel wrel 5543   RefRel wrefrel 35524   SymRel wsymrel 35530   TrRel wtrrel 35533   EqvRel weqvrel 35535   redund wredundp 35540
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2117  ax-9 2125  ax-10 2146  ax-11 2162  ax-12 2179  ax-ext 2796  ax-sep 5186  ax-nul 5193  ax-pr 5313
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2071  df-mo 2624  df-eu 2655  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2964  df-ral 3137  df-rex 3138  df-rab 3141  df-v 3481  df-dif 3921  df-un 3923  df-in 3925  df-ss 3935  df-nul 4275  df-if 4449  df-sn 4549  df-pr 4551  df-op 4555  df-br 5050  df-opab 5112  df-id 5443  df-xp 5544  df-rel 5545  df-cnv 5546  df-dm 5548  df-rn 5549  df-res 5550  df-refrel 35817  df-symrel 35845  df-eqvrel 35885  df-redundp 35925
This theorem is referenced by:  refrelredund3  35937
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