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Theorem relcnvfld 5144
Description: if  R is a relation, its double union equals the double union of its converse. (Contributed by FL, 5-Jan-2009.)
Assertion
Ref Expression
relcnvfld  |-  ( Rel 
R  ->  U. U. R  =  U. U. `' R
)

Proof of Theorem relcnvfld
StepHypRef Expression
1 relfld 5139 . 2  |-  ( Rel 
R  ->  U. U. R  =  ( dom  R  u.  ran  R ) )
2 unidmrn 5143 . 2  |-  U. U. `' R  =  ( dom  R  u.  ran  R
)
31, 2eqtr4di 2221 1  |-  ( Rel 
R  ->  U. U. R  =  U. U. `' R
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1348    u. cun 3119   U.cuni 3796   `'ccnv 4610   dom cdm 4611   ran crn 4612   Rel wrel 4616
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-v 2732  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-xp 4617  df-rel 4618  df-cnv 4619  df-dm 4621  df-rn 4622
This theorem is referenced by: (None)
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