Theorem mpt2eq123dv 5725

Description: An equality deduction for the maps-to notation. (Contributed by NM, 12-Sep-2011.)

Hypotheses

Ref	Expression
mpt2eq123dv.1	|- ( ph -> A = D )
mpt2eq123dv.2	|- ( ph -> B = E )
mpt2eq123dv.3	|- ( ph -> C = F )

Assertion

Ref	Expression
mpt2eq123dv	|- ( ph -> ( x e. A , y e. B |-> C ) = ( x e. D , y e. E |-> F ) )

Distinct variable groups:   ph, x   ph, y

Allowed substitution hints:   A( x, y)   B( x, y)   C( x, y)   D( x, y)   E( x, y)   F( x, y)

Proof of Theorem mpt2eq123dv

Step	Hyp	Ref	Expression
1		mpt2eq123dv.1	. 2 |- ( ph -> A = D )
2		mpt2eq123dv.2	. . 3 |- ( ph -> B = E )
3	2	adantr 271	. 2 |- ( ( ph /\ x e. A ) -> B = E )
4		mpt2eq123dv.3	. . 3 |- ( ph -> C = F )
5	4	adantr 271	. 2 |- ( ( ph /\ ( x e. A /\ y e. B ) ) -> C = F )
6	1, 3, 5	mpt2eq123dva 5724	1 |- ( ph -> ( x e. A , y e. B |-> C ) = ( x e. D , y e. E |-> F ) )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1290   e. wcel 1439   |-> cmpt2 5668

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1382  ax-7 1383  ax-gen 1384  ax-ie1 1428  ax-ie2 1429  ax-8 1441  ax-11 1443  ax-4 1446  ax-17 1465  ax-i9 1469  ax-ial 1473  ax-i5r 1474  ax-ext 2071

This theorem depends on definitions:  df-bi 116  df-tru 1293  df-nf 1396  df-sb 1694  df-clab 2076  df-cleq 2082  df-clel 2085  df-oprab 5670  df-mpt2 5671

This theorem is referenced by:  mpt2eq123i  5726