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Theorem trclidm 15026
Description: The transitive closure of a relation is idempotent. (Contributed by RP, 29-Apr-2020.)
Assertion
Ref Expression
trclidm (𝑅𝑉 → (t+‘(t+‘𝑅)) = (t+‘𝑅))

Proof of Theorem trclidm
StepHypRef Expression
1 fvex 6880 . 2 (t+‘𝑅) ∈ V
2 trclfvcotr 15022 . 2 (𝑅𝑉 → ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅))
3 cotrtrclfv 15025 . 2 (((t+‘𝑅) ∈ V ∧ ((t+‘𝑅) ∘ (t+‘𝑅)) ⊆ (t+‘𝑅)) → (t+‘(t+‘𝑅)) = (t+‘𝑅))
41, 2, 3sylancr 596 1 (𝑅𝑉 → (t+‘(t+‘𝑅)) = (t+‘𝑅))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1560  wcel 2142  Vcvv 3454  wss 3904  ccom 5651  cfv 6521  t+ctcl 14998
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-sep 5246  ax-nul 5256  ax-pow 5322  ax-pr 5390  ax-un 7718
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-nf 1804  df-sb 2091  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3077  df-rex 3087  df-rab 3415  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-pw 4557  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-int 4906  df-br 5101  df-opab 5163  df-mpt 5182  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-iota 6477  df-fun 6523  df-fv 6529  df-trcl 15000
This theorem is referenced by: (None)
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