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Theorem mptrcl 5661
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 5178 . 2  |-  dom  F  C_  A
31funmpt2 5309 . . . 4  |-  Fun  F
4 funrel 5287 . . . 4  |-  ( Fun 
F  ->  Rel  F )
53, 4ax-mp 5 . . 3  |-  Rel  F
6 relelfvdm 5607 . . 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 3190 1  |-  ( I  e.  ( F `  X )  ->  X  e.  A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1372    e. wcel 2175    |-> cmpt 4104   dom cdm 4674   Rel wrel 4679   Fun wfun 5264   ` cfv 5270
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 710  ax-5 1469  ax-7 1470  ax-gen 1471  ax-ie1 1515  ax-ie2 1516  ax-8 1526  ax-10 1527  ax-11 1528  ax-i12 1529  ax-bndl 1531  ax-4 1532  ax-17 1548  ax-i9 1552  ax-ial 1556  ax-i5r 1557  ax-14 2178  ax-ext 2186  ax-sep 4161  ax-pow 4217  ax-pr 4252
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1375  df-nf 1483  df-sb 1785  df-eu 2056  df-mo 2057  df-clab 2191  df-cleq 2197  df-clel 2200  df-nfc 2336  df-ral 2488  df-rex 2489  df-rab 2492  df-v 2773  df-un 3169  df-in 3171  df-ss 3178  df-pw 3617  df-sn 3638  df-pr 3639  df-op 3641  df-uni 3850  df-br 4044  df-opab 4105  df-mpt 4106  df-id 4339  df-xp 4680  df-rel 4681  df-cnv 4682  df-co 4683  df-dm 4684  df-rn 4685  df-res 4686  df-ima 4687  df-iota 5231  df-fun 5272  df-fv 5278
This theorem is referenced by:  bitsval  12225  divsfval  13131  submrcl  13274  issubg  13480  isnsg  13509  issubrng  13932  issubrg  13954  zrhval  14350  psmetdmdm  14767  psmetf  14768  psmet0  14770  psmettri2  14771  psmetres2  14776  plybss  15176
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