Theorem opelresg 5044

Description: Ordered pair membership in a restriction. Exercise 13 of [TakeutiZaring] p. 25. (Contributed by NM, 14-Oct-2005.)

Assertion

Ref	Expression
opelresg	|- ( B e. V -> ( <. A , B >. e. ( C |` D ) <-> ( <. A , B >. e. C /\ A e. D ) ) )

Proof of Theorem opelresg

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		opeq2 3883	. . 3 |- ( y = B -> <. A , y >. = <. A , B >. )
2	1	eleq1d 2301	. 2 |- ( y = B -> ( <. A , y >. e. ( C |` D ) <-> <. A , B >. e. ( C |` D ) ) )
3	1	eleq1d 2301	. . 3 |- ( y = B -> ( <. A , y >. e. C <-> <. A , B >. e. C ) )
4	3	anbi1d 465	. 2 |- ( y = B -> ( ( <. A , y >. e. C /\ A e. D ) <-> ( <. A , B >. e. C /\ A e. D ) ) )
5		vex 2815	. . 3 |- y e. _V
6	5	opelres 5042	. 2 |- ( <. A , y >. e. ( C |` D ) <-> ( <. A , y >. e. C /\ A e. D ) )
7	2, 4, 6	vtoclbg 2875	1 |- ( B e. V -> ( <. A , B >. e. ( C |` D ) <-> ( <. A , B >. e. C /\ A e. D ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1398   e. wcel 2203   <.cop 3691   |` cres 4750

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-sep 4227  ax-pow 4286  ax-pr 4321

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2814  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-opab 4171  df-xp 4754  df-res 4760

This theorem is referenced by:  brresg  5045  opelresi  5048  issref  5144