Theorem fnssres 5491

Description: Restriction of a function with a subclass of its domain. (Contributed by NM, 2-Aug-1994.)

Assertion

Ref	Expression
fnssres	|- ( ( F Fn A /\ B C_ A ) -> ( F |` B ) Fn B )

Proof of Theorem fnssres

Step	Hyp	Ref	Expression
1		fnssresb 5490	. 2 |- ( F Fn A -> ( ( F |` B ) Fn B <-> B C_ A ) )
2	1	biimpar 297	1 |- ( ( F Fn A /\ B C_ A ) -> ( F |` B ) Fn B )

Syntax hints:   -> wi 4   /\ wa 104   C_ wss 3220   |` cres 4771   Fn wfn 5367

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 4244  ax-pow 4306  ax-pr 4341

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 3687  df-sn 3711  df-pr 3712  df-op 3714  df-br 4126  df-opab 4188  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-res 4781  df-fun 5374  df-fn 5375

This theorem is referenced by:  fnssresd  5492  fnresin1  5493  fnresin2  5494  fssres  5560  fvreseq  5803  fnreseql  5810  ffvresb  5862  fnressn  5892  ofres  6307  tfrlem1  6569  frecrdg  6669  resixp  7005  resfnfinfinss  7243  suplocexprlemell  8070  seq3feq2  10891  seqf1oglem2  10935  reeff1  12445  rngmgpf  14211  mgpf  14289  upxp  15296  uptx  15298  cnmpt1st  15312  cnmpt2nd  15313  ioocosf1o  15878  mpodvdsmulf1o  16018