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Theorem fnssres 5494
Description: Restriction of a function with a subclass of its domain. (Contributed by NM, 2-Aug-1994.)
Assertion
Ref Expression
fnssres ((𝐹 Fn 𝐴𝐵𝐴) → (𝐹𝐵) Fn 𝐵)

Proof of Theorem fnssres
StepHypRef Expression
1 fnssresb 5493 . 2 (𝐹 Fn 𝐴 → ((𝐹𝐵) Fn 𝐵𝐵𝐴))
21biimpar 297 1 ((𝐹 Fn 𝐴𝐵𝐴) → (𝐹𝐵) Fn 𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wss 3220  cres 4774   Fn wfn 5370
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-res 4784  df-fun 5377  df-fn 5378
This theorem is referenced by:  fnssresd  5495  fnresin1  5496  fnresin2  5497  fssres  5563  fvreseq  5806  fnreseql  5813  ffvresb  5865  fnressn  5895  ofres  6311  tfrlem1  6573  frecrdg  6673  resixp  7009  resfnfinfinss  7247  suplocexprlemell  8074  seq3feq2  10896  seqf1oglem2  10940  reeff1  12450  rngmgpf  14219  mgpf  14298  upxp  15356  uptx  15358  cnmpt1st  15372  cnmpt2nd  15373  ioocosf1o  15938  mpodvdsmulf1o  16087
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