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Theorem fssresd 5566
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
StepHypRef Expression
1 fssresd.1 . 2  |-  ( ph  ->  F : A --> B )
2 fssresd.2 . 2  |-  ( ph  ->  C  C_  A )
3 fssres 5565 . 2  |-  ( ( F : A --> B  /\  C  C_  A )  -> 
( F  |`  C ) : C --> B )
41, 2, 3syl2anc 415 1  |-  ( ph  ->  ( F  |`  C ) : C --> B )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    C_ wss 3220    |` cres 4776   -->wf 5373
This proof depends on 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 4249  ax-pow 4311  ax-pr 4346
This proof 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 3715  df-pr 3716  df-op 3718  df-br 4131  df-opab 4193  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-fun 5379  df-fn 5380  df-f 5381
This theorem is used by:  gzsumsplit1r  13715  gsump1  14157  gsumclfi  14159  gsummptfidmadd  14161  gsumsubmclfi  14163  znf1o  14986  cnrest  15336  cnptopresti  15339  cnptoprest  15340  psmetres2  15434  xmetres2  15480  metres2  15482  xmetresbl  15541  rescncf  15682  wlkres  16620  trilpolemlt1  17090
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