Theorem onfrALTlem2 33461

Description: Lemma for onfrALT 33464. (Contributed by Alan Sare, 22-Jul-2012.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
onfrALTlem2	|- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> E. y e. a ( a i^i y ) = (/) ) )

Distinct variable groups:   y, a   x, y

Proof of Theorem onfrALTlem2

Dummy variable z is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpr 461	. . . . . . . . . . . 12 |- ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> z e. ( a i^i y ) )
2	1	a1ii 27	. . . . . . . . . . 11 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> z e. ( a i^i y ) ) ) )
3		inss2 3715	. . . . . . . . . . . 12 |- ( a i^i y ) C_ y
4	3	sseli 3495	. . . . . . . . . . 11 |- ( z e. ( a i^i y ) -> z e. y )
5	2, 4	syl8 70	. . . . . . . . . 10 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> z e. y ) ) )
6		inss1 3714	. . . . . . . . . . . . 13 |- ( a i^i y ) C_ a
7	6	sseli 3495	. . . . . . . . . . . 12 |- ( z e. ( a i^i y ) -> z e. a )
8	2, 7	syl8 70	. . . . . . . . . . 11 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> z e. a ) ) )
9		simpl 457	. . . . . . . . . . . . . . 15 |- ( ( a C_ On /\ a =/= (/) ) -> a C_ On )
10		simpl 457	. . . . . . . . . . . . . . 15 |- ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> x e. a )
11		ssel 3493	. . . . . . . . . . . . . . 15 |- ( a C_ On -> ( x e. a -> x e. On ) )
12	9, 10, 11	syl2im 38	. . . . . . . . . . . . . 14 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> x e. On ) )
13		eloni 4897	. . . . . . . . . . . . . 14 |- ( x e. On -> Ord x )
14	12, 13	syl6 33	. . . . . . . . . . . . 13 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> Ord x ) )
15		ordtr 4901	. . . . . . . . . . . . 13 |- ( Ord x -> Tr x )
16	14, 15	syl6 33	. . . . . . . . . . . 12 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> Tr x ) )
17		simpll 753	. . . . . . . . . . . . . 14 |- ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> y e. ( a i^i x ) )
18	17	a1ii 27	. . . . . . . . . . . . 13 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> y e. ( a i^i x ) ) ) )
19		inss2 3715	. . . . . . . . . . . . . 14 |- ( a i^i x ) C_ x
20	19	sseli 3495	. . . . . . . . . . . . 13 |- ( y e. ( a i^i x ) -> y e. x )
21	18, 20	syl8 70	. . . . . . . . . . . 12 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> y e. x ) ) )
22		trel 4557	. . . . . . . . . . . . 13 |- ( Tr x -> ( ( z e. y /\ y e. x ) -> z e. x ) )
23	22	expcomd 438	. . . . . . . . . . . 12 |- ( Tr x -> ( y e. x -> ( z e. y -> z e. x ) ) )
24	16, 21, 5, 23	ee233 33432	. . . . . . . . . . 11 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> z e. x ) ) )
25		elin 3683	. . . . . . . . . . . 12 |- ( z e. ( a i^i x ) <-> ( z e. a /\ z e. x ) )
26	25	simplbi2 625	. . . . . . . . . . 11 |- ( z e. a -> ( z e. x -> z e. ( a i^i x ) ) )
27	8, 24, 26	ee33 33434	. . . . . . . . . 10 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> z e. ( a i^i x ) ) ) )
28		elin 3683	. . . . . . . . . . 11 |- ( z e. ( ( a i^i x ) i^i y ) <-> ( z e. ( a i^i x ) /\ z e. y ) )
29	28	simplbi2com 627	. . . . . . . . . 10 |- ( z e. y -> ( z e. ( a i^i x ) -> z e. ( ( a i^i x ) i^i y ) ) )
30	5, 27, 29	ee33 33434	. . . . . . . . 9 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) /\ z e. ( a i^i y ) ) -> z e. ( ( a i^i x ) i^i y ) ) ) )
31	30	exp4a 606	. . . . . . . 8 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( z e. ( a i^i y ) -> z e. ( ( a i^i x ) i^i y ) ) ) ) )
32	31	ggen31 33460	. . . . . . 7 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> A. z ( z e. ( a i^i y ) -> z e. ( ( a i^i x ) i^i y ) ) ) ) )
33		dfss2 3488	. . . . . . . 8 |- ( ( a i^i y ) C_ ( ( a i^i x ) i^i y ) <-> A. z ( z e. ( a i^i y ) -> z e. ( ( a i^i x ) i^i y ) ) )
34	33	biimpri 206	. . . . . . 7 |- ( A. z ( z e. ( a i^i y ) -> z e. ( ( a i^i x ) i^i y ) ) -> ( a i^i y ) C_ ( ( a i^i x ) i^i y ) )
35	32, 34	syl8 70	. . . . . 6 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( a i^i y ) C_ ( ( a i^i x ) i^i y ) ) ) )
36		simpr 461	. . . . . . 7 |- ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( ( a i^i x ) i^i y ) = (/) )
37	36	a1ii 27	. . . . . 6 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( ( a i^i x ) i^i y ) = (/) ) ) )
38		sseq0 3826	. . . . . . 7 |- ( ( ( a i^i y ) C_ ( ( a i^i x ) i^i y ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( a i^i y ) = (/) )
39	38	ex 434	. . . . . 6 |- ( ( a i^i y ) C_ ( ( a i^i x ) i^i y ) -> ( ( ( a i^i x ) i^i y ) = (/) -> ( a i^i y ) = (/) ) )
40	35, 37, 39	ee33 33434	. . . . 5 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( a i^i y ) = (/) ) ) )
41		simpl 457	. . . . . . 7 |- ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> y e. ( a i^i x ) )
42	41	a1ii 27	. . . . . 6 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> y e. ( a i^i x ) ) ) )
43		inss1 3714	. . . . . . 7 |- ( a i^i x ) C_ a
44	43	sseli 3495	. . . . . 6 |- ( y e. ( a i^i x ) -> y e. a )
45	42, 44	syl8 70	. . . . 5 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> y e. a ) ) )
46		pm3.21 448	. . . . 5 |- ( ( a i^i y ) = (/) -> ( y e. a -> ( y e. a /\ ( a i^i y ) = (/) ) ) )
47	40, 45, 46	ee33 33434	. . . 4 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( y e. a /\ ( a i^i y ) = (/) ) ) ) )
48	47	alrimdv 1722	. . 3 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> A. y ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( y e. a /\ ( a i^i y ) = (/) ) ) ) )
49		onfrALTlem3 33459	. . . 4 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> E. y e. ( a i^i x ) ( ( a i^i x ) i^i y ) = (/) ) )
50		df-rex 2813	. . . 4 |- ( E. y e. ( a i^i x ) ( ( a i^i x ) i^i y ) = (/) <-> E. y ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) )
51	49, 50	syl6ib 226	. . 3 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> E. y ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) ) )
52		exim 1655	. . 3 |- ( A. y ( ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> ( y e. a /\ ( a i^i y ) = (/) ) ) -> ( E. y ( y e. ( a i^i x ) /\ ( ( a i^i x ) i^i y ) = (/) ) -> E. y ( y e. a /\ ( a i^i y ) = (/) ) ) )
53	48, 51, 52	syl6c 64	. 2 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> E. y ( y e. a /\ ( a i^i y ) = (/) ) ) )
54		df-rex 2813	. 2 |- ( E. y e. a ( a i^i y ) = (/) <-> E. y ( y e. a /\ ( a i^i y ) = (/) ) )
55	53, 54	syl6ibr 227	1 |- ( ( a C_ On /\ a =/= (/) ) -> ( ( x e. a /\ -. ( a i^i x ) = (/) ) -> E. y e. a ( a i^i y ) = (/) ) )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 369   A.wal 1393   = wceq 1395   E.wex 1613   e. wcel 1819   =/= wne 2652   E.wrex 2808   i^i cin 3470   C_ wss 3471   (/)c0 3793   Tr wtr 4550   Ord word 4886   Oncon0 4887

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1619  ax-4 1632  ax-5 1705  ax-6 1748  ax-7 1791  ax-9 1823  ax-10 1838  ax-11 1843  ax-12 1855  ax-13 2000  ax-ext 2435  ax-sep 4578  ax-nul 4586  ax-pr 4695

This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 975  df-tru 1398  df-fal 1401  df-ex 1614  df-nf 1618  df-sb 1741  df-eu 2287  df-mo 2288  df-clab 2443  df-cleq 2449  df-clel 2452  df-nfc 2607  df-ne 2654  df-ral 2812  df-rex 2813  df-rab 2816  df-v 3111  df-sbc 3328  df-csb 3431  df-dif 3474  df-un 3476  df-in 3478  df-ss 3485  df-nul 3794  df-if 3945  df-sn 4033  df-pr 4035  df-op 4039  df-uni 4252  df-br 4457  df-opab 4516  df-tr 4551  df-eprel 4800  df-po 4809  df-so 4810  df-fr 4847  df-we 4849  df-ord 4890  df-on 4891

This theorem is referenced by:  onfrALT  33464