Theorem resoprab2 5939

Description: Restriction of an operator abstraction. (Contributed by Jeff Madsen, 2-Sep-2009.)

Assertion

Ref	Expression
resoprab2	|- ( ( C C_ A /\ D C_ B ) -> ( { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ ph ) } |` ( C X. D ) ) = { <. <. x , y >. , z >. | ( ( x e. C /\ y e. D ) /\ ph ) } )

Distinct variable groups:   x, A, y, z   x, B, y, z   x, C, y, z   x, D, y, z

Allowed substitution hints:   ph( x, y, z)

Proof of Theorem resoprab2

Step	Hyp	Ref	Expression
1		resoprab 5938	. 2 |- ( { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ ph ) } |` ( C X. D ) ) = { <. <. x , y >. , z >. | ( ( x e. C /\ y e. D ) /\ ( ( x e. A /\ y e. B ) /\ ph ) ) }
2		anass 399	. . . 4 |- ( ( ( ( x e. C /\ y e. D ) /\ ( x e. A /\ y e. B ) ) /\ ph ) <-> ( ( x e. C /\ y e. D ) /\ ( ( x e. A /\ y e. B ) /\ ph ) ) )
3		an4 576	. . . . . 6 |- ( ( ( x e. C /\ y e. D ) /\ ( x e. A /\ y e. B ) ) <-> ( ( x e. C /\ x e. A ) /\ ( y e. D /\ y e. B ) ) )
4		ssel 3136	. . . . . . . . 9 |- ( C C_ A -> ( x e. C -> x e. A ) )
5	4	pm4.71d 391	. . . . . . . 8 |- ( C C_ A -> ( x e. C <-> ( x e. C /\ x e. A ) ) )
6	5	bicomd 140	. . . . . . 7 |- ( C C_ A -> ( ( x e. C /\ x e. A ) <-> x e. C ) )
7		ssel 3136	. . . . . . . . 9 |- ( D C_ B -> ( y e. D -> y e. B ) )
8	7	pm4.71d 391	. . . . . . . 8 |- ( D C_ B -> ( y e. D <-> ( y e. D /\ y e. B ) ) )
9	8	bicomd 140	. . . . . . 7 |- ( D C_ B -> ( ( y e. D /\ y e. B ) <-> y e. D ) )
10	6, 9	bi2anan9 596	. . . . . 6 |- ( ( C C_ A /\ D C_ B ) -> ( ( ( x e. C /\ x e. A ) /\ ( y e. D /\ y e. B ) ) <-> ( x e. C /\ y e. D ) ) )
11	3, 10	syl5bb 191	. . . . 5 |- ( ( C C_ A /\ D C_ B ) -> ( ( ( x e. C /\ y e. D ) /\ ( x e. A /\ y e. B ) ) <-> ( x e. C /\ y e. D ) ) )
12	11	anbi1d 461	. . . 4 |- ( ( C C_ A /\ D C_ B ) -> ( ( ( ( x e. C /\ y e. D ) /\ ( x e. A /\ y e. B ) ) /\ ph ) <-> ( ( x e. C /\ y e. D ) /\ ph ) ) )
13	2, 12	bitr3id 193	. . 3 |- ( ( C C_ A /\ D C_ B ) -> ( ( ( x e. C /\ y e. D ) /\ ( ( x e. A /\ y e. B ) /\ ph ) ) <-> ( ( x e. C /\ y e. D ) /\ ph ) ) )
14	13	oprabbidv 5896	. 2 |- ( ( C C_ A /\ D C_ B ) -> { <. <. x , y >. , z >. | ( ( x e. C /\ y e. D ) /\ ( ( x e. A /\ y e. B ) /\ ph ) ) } = { <. <. x , y >. , z >. | ( ( x e. C /\ y e. D ) /\ ph ) } )
15	1, 14	syl5eq 2211	1 |- ( ( C C_ A /\ D C_ B ) -> ( { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ ph ) } |` ( C X. D ) ) = { <. <. x , y >. , z >. | ( ( x e. C /\ y e. D ) /\ ph ) } )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1343   e. wcel 2136   C_ wss 3116   X. cxp 4602   |` cres 4606   {coprab 5843

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-opab 4044  df-xp 4610  df-rel 4611  df-res 4616  df-oprab 5846

This theorem is referenced by:  resmpo  5940