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Theorem structfung 13218
Description: The converse of the converse of a structure is a function. Closed form of structfun 13219. (Contributed by AV, 12-Nov-2021.)
Assertion
Ref Expression
structfung  |-  ( F Struct  X  ->  Fun  `' `' F )

Proof of Theorem structfung
StepHypRef Expression
1 structn0fun 13214 . 2  |-  ( F Struct  X  ->  Fun  ( F  \  { (/) } ) )
2 structcnvcnv 13217 . . 3  |-  ( F Struct  X  ->  `' `' F  =  ( F  \  { (/) } ) )
32funeqd 5373 . 2  |-  ( F Struct  X  ->  ( Fun  `' `' F  <->  Fun  ( F  \  { (/) } ) ) )
41, 3mpbird 167 1  |-  ( F Struct  X  ->  Fun  `' `' F )
Colors of variables: wff set class
Syntax hints:    -> wi 4    \ cdif 3207   (/)c0 3507   {csn 3688   class class class wbr 4108   `'ccnv 4747   Fun wfun 5345   Struct cstr 13197
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-ral 2525  df-rex 2526  df-rab 2529  df-v 2814  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-br 4109  df-opab 4171  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-iota 5311  df-fun 5353  df-fv 5359  df-struct 13203
This theorem is referenced by:  structfun  13219  strslfv3  13247  opelstrsl  13316
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