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Theorem foima 5620
Description: The image of the domain of an onto function. (Contributed by NM, 29-Nov-2002.)
Assertion
Ref Expression
foima  |-  ( F : A -onto-> B  -> 
( F " A
)  =  B )

Proof of Theorem foima
StepHypRef Expression
1 imadmrn 5136 . 2  |-  ( F
" dom  F )  =  ran  F
2 fof 5615 . . . 4  |-  ( F : A -onto-> B  ->  F : A --> B )
3 fdm 5539 . . . 4  |-  ( F : A --> B  ->  dom  F  =  A )
42, 3syl 14 . . 3  |-  ( F : A -onto-> B  ->  dom  F  =  A )
54imaeq2d 5126 . 2  |-  ( F : A -onto-> B  -> 
( F " dom  F )  =  ( F
" A ) )
6 forn 5618 . 2  |-  ( F : A -onto-> B  ->  ran  F  =  B )
71, 5, 63eqtr3a 2295 1  |-  ( F : A -onto-> B  -> 
( F " A
)  =  B )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    = wceq 1402   dom cdm 4774   ran crn 4775   "cima 4777   -->wf 5373   -onto->wfo 5375
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-br 4131  df-opab 4193  df-xp 4780  df-cnv 4782  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-fn 5380  df-f 5381  df-fo 5383
This theorem is used by:  foimacnv  5657  foima2  5957  fiintim  7238  fidcenumlemr  7272  eupthvdres  16716
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