Theorem fnresin1 5302

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 3342	. 2 |- ( A i^i B ) C_ A
2		fnssres 5301	. 2 |- ( ( F Fn A /\ ( A i^i B ) C_ A ) -> ( F |` ( A i^i B ) ) Fn ( A i^i B ) )
3	1, 2	mpan2 422	1 |- ( F Fn A -> ( F |` ( A i^i B ) ) Fn ( A i^i B ) )

Syntax hints:   -> wi 4   i^i cin 3115   C_ wss 3116   |` cres 4606   Fn wfn 5183

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 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187

This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-br 3983  df-opab 4044  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-res 4616  df-fun 5190  df-fn 5191

This theorem is referenced by:  frecfnom  6369