Theorem ofexg 6271

Description: A function operation restricted to a set is a set. (Contributed by NM, 28-Jul-2014.)

Assertion

Ref	Expression
ofexg	|- ( A e. V -> ( oF R |` A ) e. _V )

Proof of Theorem ofexg

Dummy variables f g x are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-of 6266	. . 3 |- oF R = ( f e. _V , g e. _V |-> ( x e. ( dom f i^i dom g ) |-> ( ( f ` x ) R ( g ` x ) ) ) )
2	1	mpofun 6155	. 2 |- Fun oF R
3		resfunexg 5905	. 2 |- ( ( Fun oF R /\ A e. V ) -> ( oF R |` A ) e. _V )
4	2, 3	mpan 424	1 |- ( A e. V -> ( oF R |` A ) e. _V )

Syntax hints:   -> wi 4   e. wcel 2203   _Vcvv 2813   i^i cin 3210   |-> cmpt 4171   dom cdm 4749   |` cres 4751   Fun wfun 5346   ` cfv 5352  (class class class)co 6050   oFcof 6264

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2206  ax-ext 2214  ax-coll 4225  ax-sep 4228  ax-pow 4287  ax-pr 4322

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-oprab 6054  df-mpo 6055  df-of 6266

This theorem is referenced by:  ofmresex  6330