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Theorem reldmrelexp 14660
Description: The domain of the repeated composition of a relation is a relation. (Contributed by AV, 12-Jul-2024.)
Assertion
Ref Expression
reldmrelexp Rel dom ↑𝑟

Proof of Theorem reldmrelexp
Dummy variables 𝑛 𝑟 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-relexp 14659 . 2 𝑟 = (𝑟 ∈ V, 𝑛 ∈ ℕ0 ↦ if(𝑛 = 0, ( I ↾ (dom 𝑟 ∪ ran 𝑟)), (seq1((𝑥 ∈ V, 𝑦 ∈ V ↦ (𝑥𝑟)), (𝑧 ∈ V ↦ 𝑟))‘𝑛)))
21reldmmpo 7386 1 Rel dom ↑𝑟
Colors of variables: wff setvar class
Syntax hints:   = wceq 1539  Vcvv 3422  cun 3881  ifcif 4456  cmpt 5153   I cid 5479  dom cdm 5580  ran crn 5581  cres 5582  ccom 5584  Rel wrel 5585  cfv 6418  cmpo 7257  0cc0 10802  1c1 10803  0cn0 12163  seqcseq 13649  𝑟crelexp 14658
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pr 5347
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565  df-br 5071  df-opab 5133  df-xp 5586  df-rel 5587  df-dm 5590  df-oprab 7259  df-mpo 7260  df-relexp 14659
This theorem is referenced by:  relexpsucrd  14672  relexpsucld  14673  relexpreld  14679  relexpdmd  14683  relexprnd  14687  relexpfldd  14689  relexpaddd  14693  dfrtrclrec2  14697  relexpindlem  14702
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