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Theorem fssresd 5307
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 5306 . 2 ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹𝐶):𝐶𝐵)
41, 2, 3syl2anc 409 1 (𝜑 → (𝐹𝐶):𝐶𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4  wss 3076  cres 4549  wf 5127
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 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4054  ax-pow 4106  ax-pr 4139
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-v 2691  df-un 3080  df-in 3082  df-ss 3089  df-pw 3517  df-sn 3538  df-pr 3539  df-op 3541  df-br 3938  df-opab 3998  df-xp 4553  df-rel 4554  df-cnv 4555  df-co 4556  df-dm 4557  df-rn 4558  df-res 4559  df-fun 5133  df-fn 5134  df-f 5135
This theorem is referenced by:  cnrest  12443  cnptopresti  12446  cnptoprest  12447  psmetres2  12541  xmetres2  12587  metres2  12589  xmetresbl  12648  rescncf  12776  trilpolemlt1  13409
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