Theorem erovlem 6861

Description: Lemma for eroprf 6862. (Contributed by Jeff Madsen, 10-Jun-2010.) (Revised by Mario Carneiro, 30-Dec-2014.)

Hypotheses

Ref	Expression
eropr.1	|- J = ( A /. R )
eropr.2	|- K = ( B /. S )
eropr.3	|- ( ph -> T e. Z )
eropr.4	|- ( ph -> R Er U )
eropr.5	|- ( ph -> S Er V )
eropr.6	|- ( ph -> T Er W )
eropr.7	|- ( ph -> A C_ U )
eropr.8	|- ( ph -> B C_ V )
eropr.9	|- ( ph -> C C_ W )
eropr.10	|- ( ph -> .+ : ( A X. B ) --> C )
eropr.11	|- ( ( ph /\ ( ( r e. A /\ s e. A ) /\ ( t e. B /\ u e. B ) ) ) -> ( ( r R s /\ t S u ) -> ( r .+ t ) T ( s .+ u ) ) )
eropr.12	|- .+^ = { <. <. x , y >. , z >. | E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) }

Assertion

Ref	Expression
erovlem	|- ( ph -> .+^ = ( x e. J , y e. K |-> ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) )

Distinct variable groups:   q, p, r, s, t, u, x, y, z, A   B, p, q, r, s, t, u, x, y, z   J, p, q, x, y, z   R, p, q, r, s, t, u, x, y, z   K, p, q, x, y, z   S, p, q, r, s, t, u, x, y, z   .+ , p, q, r, s, t, u, x, y, z   ph, p, q, r, s, t, u, x, y, z   T, p, q, r, s, t, u, x, y, z

Allowed substitution hints:   C( x, y, z, u, t, s, r, q, p)   .+^ ( x, y, z, u, t, s, r, q, p)   U( x, y, z, u, t, s, r, q, p)   J( u, t, s, r)   K( u, t, s, r)   V( x, y, z, u, t, s, r, q, p)   W( x, y, z, u, t, s, r, q, p)   Z( x, y, z, u, t, s, r, q, p)

Proof of Theorem erovlem

Dummy variable w is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpl 109	. . . . . . . 8 |- ( ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) -> ( x = [ p ] R /\ y = [ q ] S ) )
2	1	reximi 2639	. . . . . . 7 |- ( E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) -> E. q e. B ( x = [ p ] R /\ y = [ q ] S ) )
3	2	reximi 2639	. . . . . 6 |- ( E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) -> E. p e. A E. q e. B ( x = [ p ] R /\ y = [ q ] S ) )
4		eropr.1	. . . . . . . . . 10 |- J = ( A /. R )
5	4	eleq2i 2299	. . . . . . . . 9 |- ( x e. J <-> x e. ( A /. R ) )
6		vex 2816	. . . . . . . . . 10 |- x e. _V
7	6	elqs 6820	. . . . . . . . 9 |- ( x e. ( A /. R ) <-> E. p e. A x = [ p ] R )
8	5, 7	bitri 184	. . . . . . . 8 |- ( x e. J <-> E. p e. A x = [ p ] R )
9		eropr.2	. . . . . . . . . 10 |- K = ( B /. S )
10	9	eleq2i 2299	. . . . . . . . 9 |- ( y e. K <-> y e. ( B /. S ) )
11		vex 2816	. . . . . . . . . 10 |- y e. _V
12	11	elqs 6820	. . . . . . . . 9 |- ( y e. ( B /. S ) <-> E. q e. B y = [ q ] S )
13	10, 12	bitri 184	. . . . . . . 8 |- ( y e. K <-> E. q e. B y = [ q ] S )
14	8, 13	anbi12i 460	. . . . . . 7 |- ( ( x e. J /\ y e. K ) <-> ( E. p e. A x = [ p ] R /\ E. q e. B y = [ q ] S ) )
15		reeanv 2713	. . . . . . 7 |- ( E. p e. A E. q e. B ( x = [ p ] R /\ y = [ q ] S ) <-> ( E. p e. A x = [ p ] R /\ E. q e. B y = [ q ] S ) )
16	14, 15	bitr4i 187	. . . . . 6 |- ( ( x e. J /\ y e. K ) <-> E. p e. A E. q e. B ( x = [ p ] R /\ y = [ q ] S ) )
17	3, 16	sylibr 134	. . . . 5 |- ( E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) -> ( x e. J /\ y e. K ) )
18	17	pm4.71ri 392	. . . 4 |- ( E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) <-> ( ( x e. J /\ y e. K ) /\ E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) )
19		eropr.3	. . . . . . . 8 |- ( ph -> T e. Z )
20		eropr.4	. . . . . . . 8 |- ( ph -> R Er U )
21		eropr.5	. . . . . . . 8 |- ( ph -> S Er V )
22		eropr.6	. . . . . . . 8 |- ( ph -> T Er W )
23		eropr.7	. . . . . . . 8 |- ( ph -> A C_ U )
24		eropr.8	. . . . . . . 8 |- ( ph -> B C_ V )
25		eropr.9	. . . . . . . 8 |- ( ph -> C C_ W )
26		eropr.10	. . . . . . . 8 |- ( ph -> .+ : ( A X. B ) --> C )
27		eropr.11	. . . . . . . 8 |- ( ( ph /\ ( ( r e. A /\ s e. A ) /\ ( t e. B /\ u e. B ) ) ) -> ( ( r R s /\ t S u ) -> ( r .+ t ) T ( s .+ u ) ) )
28	4, 9, 19, 20, 21, 22, 23, 24, 25, 26, 27	eroveu 6860	. . . . . . 7 |- ( ( ph /\ ( x e. J /\ y e. K ) ) -> E! z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) )
29		iota1 5327	. . . . . . 7 |- ( E! z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) -> ( E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) <-> ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) = z ) )
30	28, 29	syl 14	. . . . . 6 |- ( ( ph /\ ( x e. J /\ y e. K ) ) -> ( E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) <-> ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) = z ) )
31		eqcom 2234	. . . . . 6 |- ( ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) = z <-> z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) )
32	30, 31	bitrdi 196	. . . . 5 |- ( ( ph /\ ( x e. J /\ y e. K ) ) -> ( E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) <-> z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) )
33	32	pm5.32da 452	. . . 4 |- ( ph -> ( ( ( x e. J /\ y e. K ) /\ E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) <-> ( ( x e. J /\ y e. K ) /\ z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) ) )
34	18, 33	bitrid 192	. . 3 |- ( ph -> ( E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) <-> ( ( x e. J /\ y e. K ) /\ z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) ) )
35	34	oprabbidv 6107	. 2 |- ( ph -> { <. <. x , y >. , z >. | E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) } = { <. <. x , y >. , z >. | ( ( x e. J /\ y e. K ) /\ z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) } )
36		eropr.12	. 2 |- .+^ = { <. <. x , y >. , z >. | E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) }
37		df-mpo 6055	. . 3 |- ( x e. J , y e. K |-> ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) = { <. <. x , y >. , w >. | ( ( x e. J /\ y e. K ) /\ w = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) }
38		nfv 1577	. . . 4 |- F/ w ( ( x e. J /\ y e. K ) /\ z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) )
39		nfv 1577	. . . . 5 |- F/ z ( x e. J /\ y e. K )
40		nfiota1 5314	. . . . . 6 |- F/_ z ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) )
41	40	nfeq2 2396	. . . . 5 |- F/ z w = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) )
42	39, 41	nfan 1614	. . . 4 |- F/ z ( ( x e. J /\ y e. K ) /\ w = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) )
43		eqeq1 2239	. . . . 5 |- ( z = w -> ( z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) <-> w = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) )
44	43	anbi2d 464	. . . 4 |- ( z = w -> ( ( ( x e. J /\ y e. K ) /\ z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) <-> ( ( x e. J /\ y e. K ) /\ w = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) ) )
45	38, 42, 44	cbvoprab3 6129	. . 3 |- { <. <. x , y >. , z >. | ( ( x e. J /\ y e. K ) /\ z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) } = { <. <. x , y >. , w >. | ( ( x e. J /\ y e. K ) /\ w = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) }
46	37, 45	eqtr4i 2256	. 2 |- ( x e. J , y e. K |-> ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) = { <. <. x , y >. , z >. | ( ( x e. J /\ y e. K ) /\ z = ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) }
47	35, 36, 46	3eqtr4g 2290	1 |- ( ph -> .+^ = ( x e. J , y e. K |-> ( iota z E. p e. A E. q e. B ( ( x = [ p ] R /\ y = [ q ] S ) /\ z = [ ( p .+ q ) ] T ) ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1398   E!weu 2080   e. wcel 2203   E.wrex 2521   C_ wss 3211   class class class wbr 4109   X. cxp 4747   iotacio 5310   -->wf 5348  (class class class)co 6050   {coprab 6051   e. cmpo 6052   Er wer 6764   [cec 6765   /.cqs 6766

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-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2815  df-sbc 3043  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-br 4110  df-opab 4172  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-fv 5360  df-ov 6053  df-oprab 6054  df-mpo 6055  df-er 6767  df-ec 6769  df-qs 6773

This theorem is referenced by:  eroprf  6862