Theorem ofexg 6223

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 6218	. . 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 6106	. 2 |- Fun oF R
3		resfunexg 5860	. 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 2200   _Vcvv 2799   i^i cin 3196   |-> cmpt 4145   dom cdm 4719   |` cres 4721   Fun wfun 5312   ` cfv 5318  (class class class)co 6001   oFcof 6216

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-coll 4199  ax-sep 4202  ax-pow 4258  ax-pr 4293

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-oprab 6005  df-mpo 6006  df-of 6218

This theorem is referenced by:  ofmresex  6282