Theorem csbxpgOLD 39053

Description: Distribute proper substitution through the Cartesian product of two classes. (Contributed by Alan Sare, 10-Nov-2012.) Obsolete as of 23-Aug-2018. Use csbrn 5596 instead. (New usage is discouraged.) (Proof modification is discouraged.)

Assertion

Ref	Expression
csbxpgOLD	|- ( A e. D -> [_ A / x ]_ ( B X. C ) = ( [_ A / x ]_ B X. [_ A / x ]_ C ) )

Proof of Theorem csbxpgOLD

Dummy variables w y z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		csbabgOLD 39050	. . 3 |- ( A e. D -> [_ A / x ]_ { z | E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) } = { z | [. A / x ]. E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) } )
2		sbcexgOLD 38753	. . . . 5 |- ( A e. D -> ( [. A / x ]. E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> E. w [. A / x ]. E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) ) )
3		sbcexgOLD 38753	. . . . . . 7 |- ( A e. D -> ( [. A / x ]. E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> E. y [. A / x ]. ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) ) )
4		sbcangOLD 38739	. . . . . . . . 9 |- ( A e. D -> ( [. A / x ]. ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> ( [. A / x ]. z = <. w , y >. /\ [. A / x ]. ( w e. B /\ y e. C ) ) ) )
5		sbcg 3503	. . . . . . . . . 10 |- ( A e. D -> ( [. A / x ]. z = <. w , y >. <-> z = <. w , y >. ) )
6		sbcangOLD 38739	. . . . . . . . . . 11 |- ( A e. D -> ( [. A / x ]. ( w e. B /\ y e. C ) <-> ( [. A / x ]. w e. B /\ [. A / x ]. y e. C ) ) )
7		sbcel2gOLD 38755	. . . . . . . . . . . 12 |- ( A e. D -> ( [. A / x ]. w e. B <-> w e. [_ A / x ]_ B ) )
8		sbcel2gOLD 38755	. . . . . . . . . . . 12 |- ( A e. D -> ( [. A / x ]. y e. C <-> y e. [_ A / x ]_ C ) )
9	7, 8	anbi12d 747	. . . . . . . . . . 11 |- ( A e. D -> ( ( [. A / x ]. w e. B /\ [. A / x ]. y e. C ) <-> ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) )
10	6, 9	bitrd 268	. . . . . . . . . 10 |- ( A e. D -> ( [. A / x ]. ( w e. B /\ y e. C ) <-> ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) )
11	5, 10	anbi12d 747	. . . . . . . . 9 |- ( A e. D -> ( ( [. A / x ]. z = <. w , y >. /\ [. A / x ]. ( w e. B /\ y e. C ) ) <-> ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) ) )
12	4, 11	bitrd 268	. . . . . . . 8 |- ( A e. D -> ( [. A / x ]. ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) ) )
13	12	exbidv 1850	. . . . . . 7 |- ( A e. D -> ( E. y [. A / x ]. ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) ) )
14	3, 13	bitrd 268	. . . . . 6 |- ( A e. D -> ( [. A / x ]. E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) ) )
15	14	exbidv 1850	. . . . 5 |- ( A e. D -> ( E. w [. A / x ]. E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> E. w E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) ) )
16	2, 15	bitrd 268	. . . 4 |- ( A e. D -> ( [. A / x ]. E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) <-> E. w E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) ) )
17	16	abbidv 2741	. . 3 |- ( A e. D -> { z | [. A / x ]. E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) } = { z | E. w E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) } )
18	1, 17	eqtrd 2656	. 2 |- ( A e. D -> [_ A / x ]_ { z | E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) } = { z | E. w E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) } )
19		df-xp 5120	. . . 4 |- ( B X. C ) = { <. w , y >. | ( w e. B /\ y e. C ) }
20		df-opab 4713	. . . 4 |- { <. w , y >. | ( w e. B /\ y e. C ) } = { z | E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) }
21	19, 20	eqtri 2644	. . 3 |- ( B X. C ) = { z | E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) }
22	21	csbeq2i 3993	. 2 |- [_ A / x ]_ ( B X. C ) = [_ A / x ]_ { z | E. w E. y ( z = <. w , y >. /\ ( w e. B /\ y e. C ) ) }
23		df-xp 5120	. . 3 |- ( [_ A / x ]_ B X. [_ A / x ]_ C ) = { <. w , y >. | ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) }
24		df-opab 4713	. . 3 |- { <. w , y >. | ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) } = { z | E. w E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) }
25	23, 24	eqtri 2644	. 2 |- ( [_ A / x ]_ B X. [_ A / x ]_ C ) = { z | E. w E. y ( z = <. w , y >. /\ ( w e. [_ A / x ]_ B /\ y e. [_ A / x ]_ C ) ) }
26	18, 22, 25	3eqtr4g 2681	1 |- ( A e. D -> [_ A / x ]_ ( B X. C ) = ( [_ A / x ]_ B X. [_ A / x ]_ C ) )

Syntax hints:   -> wi 4   /\ wa 384   = wceq 1483   E.wex 1704   e. wcel 1990   {cab 2608   [.wsbc 3435   [_csb 3533   <.cop 4183   {copab 4712   X. cxp 5112

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-v 3202  df-sbc 3436  df-csb 3534  df-opab 4713  df-xp 5120

This theorem is referenced by:  csbresgOLD  39055  csbresgVD  39131