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Theorem structfung 13250
Description: The converse of the converse of a structure is a function. Closed form of structfun 13251. (Contributed by AV, 12-Nov-2021.)
Assertion
Ref Expression
structfung  |-  ( F Struct  X  ->  Fun  `' `' F )

Proof of Theorem structfung
StepHypRef Expression
1 structn0fun 13246 . 2  |-  ( F Struct  X  ->  Fun  ( F  \  { (/) } ) )
2 structcnvcnv 13249 . . 3  |-  ( F Struct  X  ->  `' `' F  =  ( F  \  { (/) } ) )
32funeqd 5376 . 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 3210   (/)c0 3510   {csn 3691   class class class wbr 4111   `'ccnv 4750   Fun wfun 5348   Struct cstr 13229
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 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324
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 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-ral 2527  df-rex 2528  df-rab 2531  df-v 2817  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-br 4112  df-opab 4174  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-iota 5314  df-fun 5356  df-fv 5362  df-struct 13235
This theorem is referenced by:  structfun  13251  strslfv3  13279  opelstrsl  13348
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