Theorem f1ores 5455

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 5410	. . 3 |- ( ( F : A -1-1-> B /\ C C_ A ) -> ( F |` C ) : C -1-1-> B )
2		f1f1orn 5451	. . 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 4622	. . 3 |- ( F " C ) = ran ( F |` C )
5		f1oeq3 5431	. . 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 133	1 |- ( ( F : A -1-1-> B /\ C C_ A ) -> ( F |` C ) : C -1-1-onto-> ( F " C ) )

Syntax hints:   -> wi 4   /\ wa 103   <-> wb 104   = wceq 1348   C_ wss 3121   ran crn 4610   |` cres 4611   "cima 4612   -1-1->wf1 5193   -1-1-onto->wf1o 5195

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-14 2144  ax-ext 2152  ax-sep 4105  ax-pow 4158  ax-pr 4192

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-v 2732  df-un 3125  df-in 3127  df-ss 3134  df-pw 3566  df-sn 3587  df-pr 3588  df-op 3590  df-br 3988  df-opab 4049  df-xp 4615  df-rel 4616  df-cnv 4617  df-co 4618  df-dm 4619  df-rn 4620  df-res 4621  df-ima 4622  df-fun 5198  df-fn 5199  df-f 5200  df-f1 5201  df-fo 5202  df-f1o 5203

This theorem is referenced by:  f1imacnv  5457  f1oresrab  5659  isores3  5792  isoini2  5796  f1imaeng  6768  f1imaen2g  6769  preimaf1ofi  6926  endjusym  7071  dju1p1e2  7167  fisumss  11348  fprodssdc  11546  ssnnctlemct  12394