Theorem resmpo 6118

Description: Restriction of the mapping operation. (Contributed by Mario Carneiro, 17-Dec-2013.)

Assertion

Ref	Expression
resmpo	|- ( ( C C_ A /\ D C_ B ) -> ( ( x e. A , y e. B |-> E ) |` ( C X. D ) ) = ( x e. C , y e. D |-> E ) )

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

Allowed substitution hints:   E( x, y)

Proof of Theorem resmpo

Dummy variable z is distinct from all other variables.

Step	Hyp	Ref	Expression
1		resoprab2 6117	. 2 |- ( ( C C_ A /\ D C_ B ) -> ( { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = E ) } |` ( C X. D ) ) = { <. <. x , y >. , z >. | ( ( x e. C /\ y e. D ) /\ z = E ) } )
2		df-mpo 6022	. . 3 |- ( x e. A , y e. B |-> E ) = { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = E ) }
3	2	reseq1i 5009	. 2 |- ( ( x e. A , y e. B |-> E ) |` ( C X. D ) ) = ( { <. <. x , y >. , z >. | ( ( x e. A /\ y e. B ) /\ z = E ) } |` ( C X. D ) )
4		df-mpo 6022	. 2 |- ( x e. C , y e. D |-> E ) = { <. <. x , y >. , z >. | ( ( x e. C /\ y e. D ) /\ z = E ) }
5	1, 3, 4	3eqtr4g 2289	1 |- ( ( C C_ A /\ D C_ B ) -> ( ( x e. A , y e. B |-> E ) |` ( C X. D ) ) = ( x e. C , y e. D |-> E ) )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1397   e. wcel 2202   C_ wss 3200   X. cxp 4723   |` cres 4727   {coprab 6018   e. cmpo 6019

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-opab 4151  df-xp 4731  df-rel 4732  df-res 4737  df-oprab 6021  df-mpo 6022

This theorem is referenced by:  ofmres  6297  divfnzn  9854  txss12  14989  txbasval  14990  cnmpt2res  15020