Theorem fovcl 5869

Description: Closure law for an operation. (Contributed by NM, 19-Apr-2007.)

Hypothesis

Ref	Expression
fovcl.1	|- F : ( R X. S ) --> C

Assertion

Ref	Expression
fovcl	|- ( ( A e. R /\ B e. S ) -> ( A F B ) e. C )

Proof of Theorem fovcl

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fovcl.1	. . 3 |- F : ( R X. S ) --> C
2		ffnov 5868	. . . 4 |- ( F : ( R X. S ) --> C <-> ( F Fn ( R X. S ) /\ A. x e. R A. y e. S ( x F y ) e. C ) )
3	2	simprbi 273	. . 3 |- ( F : ( R X. S ) --> C -> A. x e. R A. y e. S ( x F y ) e. C )
4	1, 3	ax-mp 5	. 2 |- A. x e. R A. y e. S ( x F y ) e. C
5		oveq1 5774	. . . 4 |- ( x = A -> ( x F y ) = ( A F y ) )
6	5	eleq1d 2206	. . 3 |- ( x = A -> ( ( x F y ) e. C <-> ( A F y ) e. C ) )
7		oveq2 5775	. . . 4 |- ( y = B -> ( A F y ) = ( A F B ) )
8	7	eleq1d 2206	. . 3 |- ( y = B -> ( ( A F y ) e. C <-> ( A F B ) e. C ) )
9	6, 8	rspc2v 2797	. 2 |- ( ( A e. R /\ B e. S ) -> ( A. x e. R A. y e. S ( x F y ) e. C -> ( A F B ) e. C ) )
10	4, 9	mpi 15	1 |- ( ( A e. R /\ B e. S ) -> ( A F B ) e. C )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1331   e. wcel 1480   A.wral 2414   X. cxp 4532   Fn wfn 5113   -->wf 5114  (class class class)co 5767

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 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-pow 4093  ax-pr 4126

This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2000  df-mo 2001  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-v 2683  df-sbc 2905  df-csb 2999  df-un 3070  df-in 3072  df-ss 3079  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-uni 3732  df-iun 3810  df-br 3925  df-opab 3985  df-mpt 3986  df-id 4210  df-xp 4540  df-rel 4541  df-cnv 4542  df-co 4543  df-dm 4544  df-rn 4545  df-iota 5083  df-fun 5120  df-fn 5121  df-f 5122  df-fv 5126  df-ov 5770

This theorem is referenced by:  xaddcl  9636  ixxssxr  9676  fzof  9914  elfzoelz  9917  fzoval  9918  addcncntoplem  12709