Theorem f1ores 5652

Description: The restriction of a one-to-one function maps one-to-one onto the image. (Contributed by NM, 25-Mar-1998.)

Assertion

Ref	Expression
f1ores	|- ( ( F : A -1-1-> B /\ C C_ A ) -> ( F |` C ) : C -1-1-onto-> ( F " C ) )

Proof of Theorem f1ores

Step	Hyp	Ref	Expression
1		f1ssres 5605	. . 3 |- ( ( F : A -1-1-> B /\ C C_ A ) -> ( F |` C ) : C -1-1-> B )
2		f1f1orn 5648	. . 3 |- ( ( F |` C ) : C -1-1-> B -> ( F |` C ) : C -1-1-onto-> ran ( F |` C ) )
3	1, 2	syl 14	. 2 |- ( ( F : A -1-1-> B /\ C C_ A ) -> ( F |` C ) : C -1-1-onto-> ran ( F |` C ) )
4		df-ima 4785	. . 3 |- ( F " C ) = ran ( F |` C )
5		f1oeq3 5627	. . 3 |- ( ( F " C ) = ran ( F |` C ) -> ( ( F |` C ) : C -1-1-onto-> ( F " C ) <-> ( F |` C ) : C -1-1-onto-> ran ( F |` C ) ) )
6	4, 5	ax-mp 5	. 2 |- ( ( F |` C ) : C -1-1-onto-> ( F " C ) <-> ( F |` C ) : C -1-1-onto-> ran ( F |` C ) )
7	3, 6	sylibr 134	1 |- ( ( F : A -1-1-> B /\ C C_ A ) -> ( F |` C ) : C -1-1-onto-> ( F " C ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1402   C_ wss 3220   ran crn 4773   |` cres 4774   "cima 4775   -1-1->wf1 5372   -1-1-onto->wf1o 5374

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 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 4247  ax-pow 4309  ax-pr 4344

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  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 3714  df-pr 3715  df-op 3717  df-br 4129  df-opab 4191  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-fun 5377  df-fn 5378  df-f 5379  df-f1 5380  df-fo 5381  df-f1o 5382

This theorem is referenced by:  f1imacnv  5654  f1oresrab  5867  isores3  6014  isoini2  6018  rinvf1o  6028  f1imaeng  7072  f1imaen2g  7073  preimaf1ofi  7261  endjusym  7429  dju1p1e2  7542  fisumss  12140  fprodssdc  12338  ballotfilemfrc  13251  ssnnctlemct  13318  eqgen  14010  ushgredgedg  16384  ushgredgedgloop  16386  trlreslem  16547  domomsubct  16948