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Theorem fnssres 5439
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 5438 . 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 3197  cres 4722   Fn wfn 5316
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4259  ax-pr 4294
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-br 4084  df-opab 4146  df-xp 4726  df-rel 4727  df-cnv 4728  df-co 4729  df-dm 4730  df-res 4732  df-fun 5323  df-fn 5324
This theorem is referenced by:  fnssresd  5440  fnresin1  5441  fnresin2  5442  fssres  5506  fvreseq  5743  fnreseql  5750  ffvresb  5803  fnressn  5832  ofres  6242  tfrlem1  6465  frecrdg  6565  resixp  6893  resfnfinfinss  7122  suplocexprlemell  7916  seq3feq2  10715  seqf1oglem2  10759  reeff1  12232  rngmgpf  13921  mgpf  13995  upxp  14967  uptx  14969  cnmpt1st  14983  cnmpt2nd  14984  ioocosf1o  15549  mpodvdsmulf1o  15685
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