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Theorem funrnfi 7008
Description: The range of a finite relation is finite if its converse is a function. (Contributed by Jim Kingdon, 5-Feb-2022.)
Assertion
Ref Expression
funrnfi  |-  ( ( Rel  A  /\  Fun  `' A  /\  A  e. 
Fin )  ->  ran  A  e.  Fin )

Proof of Theorem funrnfi
StepHypRef Expression
1 df-rn 4674 . 2  |-  ran  A  =  dom  `' A
2 relcnvfi 7007 . . . 4  |-  ( ( Rel  A  /\  A  e.  Fin )  ->  `' A  e.  Fin )
323adant2 1018 . . 3  |-  ( ( Rel  A  /\  Fun  `' A  /\  A  e. 
Fin )  ->  `' A  e.  Fin )
4 simp2 1000 . . 3  |-  ( ( Rel  A  /\  Fun  `' A  /\  A  e. 
Fin )  ->  Fun  `' A )
5 fundmfi 7003 . . 3  |-  ( ( `' A  e.  Fin  /\ 
Fun  `' A )  ->  dom  `' A  e.  Fin )
63, 4, 5syl2anc 411 . 2  |-  ( ( Rel  A  /\  Fun  `' A  /\  A  e. 
Fin )  ->  dom  `' A  e.  Fin )
71, 6eqeltrid 2283 1  |-  ( ( Rel  A  /\  Fun  `' A  /\  A  e. 
Fin )  ->  ran  A  e.  Fin )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ w3a 980    e. wcel 2167   `'ccnv 4662   dom cdm 4663   ran crn 4664   Rel wrel 4668   Fun wfun 5252   Fincfn 6799
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 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-v 2765  df-sbc 2990  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-1st 6198  df-2nd 6199  df-er 6592  df-en 6800  df-fin 6802
This theorem is referenced by:  f1dmvrnfibi  7010  4sqlemffi  12565
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