Theorem mpteq2da 4215

Description: Slightly more general equality inference for the maps-to notation. (Contributed by FL, 14-Sep-2013.) (Revised by Mario Carneiro, 16-Dec-2013.)

Hypotheses

Ref	Expression
mpteq2da.1	|- F/ x ph
mpteq2da.2	|- ( ( ph /\ x e. A ) -> B = C )

Assertion

Ref	Expression
mpteq2da	|- ( ph -> ( x e. A |-> B ) = ( x e. A |-> C ) )

Proof of Theorem mpteq2da

Step	Hyp	Ref	Expression
1		eqid 2238	. . 3 |- A = A
2	1	ax-gen 1502	. 2 |- A. x A = A
3		mpteq2da.1	. . 3 |- F/ x ph
4		mpteq2da.2	. . . 4 |- ( ( ph /\ x e. A ) -> B = C )
5	4	ex 115	. . 3 |- ( ph -> ( x e. A -> B = C ) )
6	3, 5	ralrimi 2621	. 2 |- ( ph -> A. x e. A B = C )
7		mpteq12f 4206	. 2 |- ( ( A. x A = A /\ A. x e. A B = C ) -> ( x e. A |-> B ) = ( x e. A |-> C ) )
8	2, 6, 7	sylancr 418	1 |- ( ph -> ( x e. A |-> B ) = ( x e. A |-> C ) )

Syntax hints:   -> wi 4   /\ wa 104   A.wal 1400   = wceq 1402   F/wnf 1513   e. wcel 2209   A.wral 2528   |-> cmpt 4187

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-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-11 1559  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220

This theorem depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-ral 2533  df-opab 4188  df-mpt 4189

This theorem is referenced by:  mpteq2dva  4216  prodeq1f  12297  prodeq2  12302  gzsumsnfd  14124