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Theorem mptrcl 5725
Description: Reverse closure for a mapping: If the function value of a mapping has a member, the argument belongs to the base class of the mapping. (Contributed by AV, 4-Apr-2020.) (Revised by Jim Kingdon, 27-Mar-2023.)
Hypothesis
Ref Expression
fvmpt2.1  |-  F  =  ( x  e.  A  |->  B )
Assertion
Ref Expression
mptrcl  |-  ( I  e.  ( F `  X )  ->  X  e.  A )
Distinct variable group:    x, A
Allowed substitution hints:    B( x)    F( x)    I( x)    X( x)

Proof of Theorem mptrcl
StepHypRef Expression
1 fvmpt2.1 . . 3  |-  F  =  ( x  e.  A  |->  B )
21dmmptss 5231 . 2  |-  dom  F  C_  A
31funmpt2 5363 . . . 4  |-  Fun  F
4 funrel 5341 . . . 4  |-  ( Fun 
F  ->  Rel  F )
53, 4ax-mp 5 . . 3  |-  Rel  F
6 relelfvdm 5667 . . 3  |-  ( ( Rel  F  /\  I  e.  ( F `  X
) )  ->  X  e.  dom  F )
75, 6mpan 424 . 2  |-  ( I  e.  ( F `  X )  ->  X  e.  dom  F )
82, 7sselid 3223 1  |-  ( I  e.  ( F `  X )  ->  X  e.  A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1395    e. wcel 2200    |-> cmpt 4148   dom cdm 4723   Rel wrel 4728   Fun wfun 5318   ` cfv 5324
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-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2802  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-br 4087  df-opab 4149  df-mpt 4150  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-res 4735  df-ima 4736  df-iota 5284  df-fun 5326  df-fv 5332
This theorem is referenced by:  bitsval  12494  divsfval  13401  submrcl  13544  issubg  13750  isnsg  13779  issubrng  14203  issubrg  14225  zrhval  14621  psmetdmdm  15038  psmetf  15039  psmet0  15041  psmettri2  15042  psmetres2  15047  plybss  15447  edgval  15901  wlkmex  16116  wlkreslem  16173  trlsv  16179  isclwwlk  16189  clwwlkbp  16190  clwwlknonmpo  16223  eupthv  16241
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