Theorem mpoxopoveq 6328

Description: Value of an operation given by a maps-to rule, where the first argument is a pair and the base set of the second argument is the first component of the first argument. (Contributed by Alexander van der Vekens, 11-Oct-2017.)

Hypothesis

Ref	Expression
mpoxopoveq.f	|- F = ( x e. _V , y e. ( 1st ` x ) |-> { n e. ( 1st ` x ) | ph } )

Assertion

Ref	Expression
mpoxopoveq	|- ( ( ( V e. X /\ W e. Y ) /\ K e. V ) -> ( <. V , W >. F K ) = { n e. V | [. <. V , W >. / x ]. [. K / y ]. ph } )

Distinct variable groups:   n, K, x, y   n, V, x, y   n, W, x, y   n, X, x, y   n, Y, x, y

Allowed substitution hints:   ph( x, y, n)   F( x, y, n)

Proof of Theorem mpoxopoveq

Step	Hyp	Ref	Expression
1		mpoxopoveq.f	. . 3 |- F = ( x e. _V , y e. ( 1st ` x ) |-> { n e. ( 1st ` x ) | ph } )
2	1	a1i 9	. 2 |- ( ( ( V e. X /\ W e. Y ) /\ K e. V ) -> F = ( x e. _V , y e. ( 1st ` x ) |-> { n e. ( 1st ` x ) | ph } ) )
3		fveq2 5578	. . . . 5 |- ( x = <. V , W >. -> ( 1st ` x ) = ( 1st ` <. V , W >. ) )
4		op1stg 6238	. . . . . 6 |- ( ( V e. X /\ W e. Y ) -> ( 1st ` <. V , W >. ) = V )
5	4	adantr 276	. . . . 5 |- ( ( ( V e. X /\ W e. Y ) /\ K e. V ) -> ( 1st ` <. V , W >. ) = V )
6	3, 5	sylan9eqr 2260	. . . 4 |- ( ( ( ( V e. X /\ W e. Y ) /\ K e. V ) /\ x = <. V , W >. ) -> ( 1st ` x ) = V )
7	6	adantrr 479	. . 3 |- ( ( ( ( V e. X /\ W e. Y ) /\ K e. V ) /\ ( x = <. V , W >. /\ y = K ) ) -> ( 1st ` x ) = V )
8		sbceq1a 3008	. . . . . 6 |- ( y = K -> ( ph <-> [. K / y ]. ph ) )
9	8	adantl 277	. . . . 5 |- ( ( x = <. V , W >. /\ y = K ) -> ( ph <-> [. K / y ]. ph ) )
10	9	adantl 277	. . . 4 |- ( ( ( ( V e. X /\ W e. Y ) /\ K e. V ) /\ ( x = <. V , W >. /\ y = K ) ) -> ( ph <-> [. K / y ]. ph ) )
11		sbceq1a 3008	. . . . . 6 |- ( x = <. V , W >. -> ( [. K / y ]. ph <-> [. <. V , W >. / x ]. [. K / y ]. ph ) )
12	11	adantr 276	. . . . 5 |- ( ( x = <. V , W >. /\ y = K ) -> ( [. K / y ]. ph <-> [. <. V , W >. / x ]. [. K / y ]. ph ) )
13	12	adantl 277	. . . 4 |- ( ( ( ( V e. X /\ W e. Y ) /\ K e. V ) /\ ( x = <. V , W >. /\ y = K ) ) -> ( [. K / y ]. ph <-> [. <. V , W >. / x ]. [. K / y ]. ph ) )
14	10, 13	bitrd 188	. . 3 |- ( ( ( ( V e. X /\ W e. Y ) /\ K e. V ) /\ ( x = <. V , W >. /\ y = K ) ) -> ( ph <-> [. <. V , W >. / x ]. [. K / y ]. ph ) )
15	7, 14	rabeqbidv 2767	. 2 |- ( ( ( ( V e. X /\ W e. Y ) /\ K e. V ) /\ ( x = <. V , W >. /\ y = K ) ) -> { n e. ( 1st ` x ) | ph } = { n e. V | [. <. V , W >. / x ]. [. K / y ]. ph } )
16		opexg 4273	. . 3 |- ( ( V e. X /\ W e. Y ) -> <. V , W >. e. _V )
17	16	adantr 276	. 2 |- ( ( ( V e. X /\ W e. Y ) /\ K e. V ) -> <. V , W >. e. _V )
18		simpr 110	. 2 |- ( ( ( V e. X /\ W e. Y ) /\ K e. V ) -> K e. V )
19		rabexg 4188	. . 3 |- ( V e. X -> { n e. V | [. <. V , W >. / x ]. [. K / y ]. ph } e. _V )
20	19	ad2antrr 488	. 2 |- ( ( ( V e. X /\ W e. Y ) /\ K e. V ) -> { n e. V | [. <. V , W >. / x ]. [. K / y ]. ph } e. _V )
21		equid 1724	. . 3 |- z = z
22		nfvd 1552	. . 3 |- ( z = z -> F/ x ( ( V e. X /\ W e. Y ) /\ K e. V ) )
23	21, 22	ax-mp 5	. 2 |- F/ x ( ( V e. X /\ W e. Y ) /\ K e. V )
24		nfvd 1552	. . 3 |- ( z = z -> F/ y ( ( V e. X /\ W e. Y ) /\ K e. V ) )
25	21, 24	ax-mp 5	. 2 |- F/ y ( ( V e. X /\ W e. Y ) /\ K e. V )
26		nfcv 2348	. 2 |- F/_ y <. V , W >.
27		nfcv 2348	. 2 |- F/_ x K
28		nfsbc1v 3017	. . 3 |- F/ x [. <. V , W >. / x ]. [. K / y ]. ph
29		nfcv 2348	. . 3 |- F/_ x V
30	28, 29	nfrabw 2687	. 2 |- F/_ x { n e. V | [. <. V , W >. / x ]. [. K / y ]. ph }
31		nfsbc1v 3017	. . . 4 |- F/ y [. K / y ]. ph
32	26, 31	nfsbc 3019	. . 3 |- F/ y [. <. V , W >. / x ]. [. K / y ]. ph
33		nfcv 2348	. . 3 |- F/_ y V
34	32, 33	nfrabw 2687	. 2 |- F/_ y { n e. V | [. <. V , W >. / x ]. [. K / y ]. ph }
35	2, 15, 6, 17, 18, 20, 23, 25, 26, 27, 30, 34	ovmpodxf 6073	1 |- ( ( ( V e. X /\ W e. Y ) /\ K e. V ) -> ( <. V , W >. F K ) = { n e. V | [. <. V , W >. / x ]. [. K / y ]. ph } )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1373   F/wnf 1483   e. wcel 2176   {crab 2488   _Vcvv 2772   [.wsbc 2998   <.cop 3636   ` cfv 5272  (class class class)co 5946   e. cmpo 5948   1stc1st 6226

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-in1 615  ax-in2 616  ax-io 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-13 2178  ax-14 2179  ax-ext 2187  ax-sep 4163  ax-pow 4219  ax-pr 4254  ax-un 4481  ax-setind 4586

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1484  df-sb 1786  df-eu 2057  df-mo 2058  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-ne 2377  df-ral 2489  df-rex 2490  df-rab 2493  df-v 2774  df-sbc 2999  df-dif 3168  df-un 3170  df-in 3172  df-ss 3179  df-pw 3618  df-sn 3639  df-pr 3640  df-op 3642  df-uni 3851  df-br 4046  df-opab 4107  df-mpt 4108  df-id 4341  df-xp 4682  df-rel 4683  df-cnv 4684  df-co 4685  df-dm 4686  df-rn 4687  df-iota 5233  df-fun 5274  df-fv 5280  df-ov 5949  df-oprab 5950  df-mpo 5951  df-1st 6228

This theorem is referenced by:  mpoxopovel  6329