Theorem fssresd 5294

Description: Restriction of a function with a subclass of its domain, deduction form. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

Hypotheses

Ref	Expression
fssresd.1	|- ( ph -> F : A --> B )
fssresd.2	|- ( ph -> C C_ A )

Assertion

Ref	Expression
fssresd	|- ( ph -> ( F |` C ) : C --> B )

Proof of Theorem fssresd

Step	Hyp	Ref	Expression
1		fssresd.1	. 2 |- ( ph -> F : A --> B )
2		fssresd.2	. 2 |- ( ph -> C C_ A )
3		fssres 5293	. 2 |- ( ( F : A --> B /\ C C_ A ) -> ( F |` C ) : C --> B )
4	1, 2, 3	syl2anc 408	1 |- ( ph -> ( F |` C ) : C --> B )

Syntax hints:   -> wi 4   C_ wss 3066   |` cres 4536   -->wf 5114

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 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-pow 4093  ax-pr 4126

This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-v 2683  df-un 3070  df-in 3072  df-ss 3079  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-br 3925  df-opab 3985  df-xp 4540  df-rel 4541  df-cnv 4542  df-co 4543  df-dm 4544  df-rn 4545  df-res 4546  df-fun 5120  df-fn 5121  df-f 5122

This theorem is referenced by:  cnrest  12393  cnptopresti  12396  cnptoprest  12397  psmetres2  12491  xmetres2  12537  metres2  12539  xmetresbl  12598  rescncf  12726  trilpolemlt1  13223