Theorem fnresin1 5493

Description: Restriction of a function's domain with an intersection. (Contributed by NM, 9-Aug-1994.)

Assertion

Ref	Expression
fnresin1	|- ( F Fn A -> ( F |` ( A i^i B ) ) Fn ( A i^i B ) )

Proof of Theorem fnresin1

Step	Hyp	Ref	Expression
1		inss1 3451	. 2 |- ( A i^i B ) C_ A
2		fnssres 5491	. 2 |- ( ( F Fn A /\ ( A i^i B ) C_ A ) -> ( F |` ( A i^i B ) ) Fn ( A i^i B ) )
3	1, 2	mpan2 429	1 |- ( F Fn A -> ( F |` ( A i^i B ) ) Fn ( A i^i B ) )

Syntax hints:   -> wi 4   i^i cin 3219   C_ wss 3220   |` cres 4771   Fn wfn 5367

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 4244  ax-pow 4306  ax-pr 4341

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 3687  df-sn 3711  df-pr 3712  df-op 3714  df-br 4126  df-opab 4188  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-res 4781  df-fun 5374  df-fn 5375

This theorem is referenced by:  frecfnom  6662