Theorem fnssres 5032

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 5031	. 2 |- ( F Fn A -> ( ( F |` B ) Fn B <-> B C_ A ) )
2	1	biimpar 291	1 |- ( ( F Fn A /\ B C_ A ) -> ( F |` B ) Fn B )

Syntax hints:   -> wi 4   /\ wa 102   C_ wss 2973   |` cres 4365   Fn wfn 4917

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-sep 3896  ax-pow 3948  ax-pr 3964

This theorem depends on definitions:  df-bi 115  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ral 2353  df-rex 2354  df-v 2603  df-un 2977  df-in 2979  df-ss 2986  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-br 3786  df-opab 3840  df-xp 4369  df-rel 4370  df-cnv 4371  df-co 4372  df-dm 4373  df-res 4375  df-fun 4924  df-fn 4925

This theorem is referenced by:  fnresin1  5033  fnresin2  5034  fssres  5086  fvreseq  5292  fnreseql  5298  ffvresb  5349  fnressn  5370  ofres  5745  tfrlem1  5946  frecrdg  6015  iseqfeq2  9449  eucialg  10441