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Theorem fssresd 5564
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 (𝜑𝐹:𝐴𝐵)
fssresd.2 (𝜑𝐶𝐴)
Assertion
Ref Expression
fssresd (𝜑 → (𝐹𝐶):𝐶𝐵)

Proof of Theorem fssresd
StepHypRef Expression
1 fssresd.1 . 2 (𝜑𝐹:𝐴𝐵)
2 fssresd.2 . 2 (𝜑𝐶𝐴)
3 fssres 5563 . 2 ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹𝐶):𝐶𝐵)
41, 2, 3syl2anc 415 1 (𝜑 → (𝐹𝐶):𝐶𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4  wss 3220  cres 4774  wf 5371
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 4247  ax-pow 4309  ax-pr 4344
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 3690  df-sn 3714  df-pr 3715  df-op 3717  df-br 4129  df-opab 4191  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-fun 5377  df-fn 5378  df-f 5379
This theorem is referenced by:  gzsumsplit1r  13698  gsump1  14140  gsumclfi  14142  gsummptfidmadd  14144  gsumsubmclfi  14146  znf1o  14969  cnrest  15319  cnptopresti  15322  cnptoprest  15323  psmetres2  15417  xmetres2  15463  metres2  15465  xmetresbl  15524  rescncf  15665  wlkres  16603  trilpolemlt1  17064
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