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Theorem relcnvfld 5137
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 5132 . 2  |-  ( Rel 
R  ->  U. U. R  =  ( dom  R  u.  ran  R ) )
2 unidmrn 5136 . 2  |-  U. U. `' R  =  ( dom  R  u.  ran  R
)
31, 2eqtr4di 2217 1  |-  ( Rel 
R  ->  U. U. R  =  U. U. `' R
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1343    u. cun 3114   U.cuni 3789   `'ccnv 4603   dom cdm 4604   ran crn 4605   Rel wrel 4609
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 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-br 3983  df-opab 4044  df-xp 4610  df-rel 4611  df-cnv 4612  df-dm 4614  df-rn 4615
This theorem is referenced by: (None)
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