Theorem seqomlem1 7545

Description: Lemma for seq_𝜔. The underlying recursion generates a sequence of pairs with the expected first values. (Contributed by Stefan O'Rear, 1-Nov-2014.) (Revised by Mario Carneiro, 23-Jun-2015.)

Hypothesis

Ref	Expression
seqomlem.a	|- Q = rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. )

Assertion

Ref	Expression
seqomlem1	|- ( A e. om -> ( Q ` A ) = <. A , ( 2nd ` ( Q ` A ) ) >. )

Distinct variable groups:   Q, i, v   A, i, v   i, F, v

Allowed substitution hints:   I( v, i)

Proof of Theorem seqomlem1

Dummy variables a b are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fveq2 6191	. . 3 |- ( a = (/) -> ( Q ` a ) = ( Q ` (/) ) )
2		id 22	. . . 4 |- ( a = (/) -> a = (/) )
3	1	fveq2d 6195	. . . 4 |- ( a = (/) -> ( 2nd ` ( Q ` a ) ) = ( 2nd ` ( Q ` (/) ) ) )
4	2, 3	opeq12d 4410	. . 3 |- ( a = (/) -> <. a , ( 2nd ` ( Q ` a ) ) >. = <. (/) , ( 2nd ` ( Q ` (/) ) ) >. )
5	1, 4	eqeq12d 2637	. 2 |- ( a = (/) -> ( ( Q ` a ) = <. a , ( 2nd ` ( Q ` a ) ) >. <-> ( Q ` (/) ) = <. (/) , ( 2nd ` ( Q ` (/) ) ) >. ) )
6		fveq2 6191	. . 3 |- ( a = b -> ( Q ` a ) = ( Q ` b ) )
7		id 22	. . . 4 |- ( a = b -> a = b )
8	6	fveq2d 6195	. . . 4 |- ( a = b -> ( 2nd ` ( Q ` a ) ) = ( 2nd ` ( Q ` b ) ) )
9	7, 8	opeq12d 4410	. . 3 |- ( a = b -> <. a , ( 2nd ` ( Q ` a ) ) >. = <. b , ( 2nd ` ( Q ` b ) ) >. )
10	6, 9	eqeq12d 2637	. 2 |- ( a = b -> ( ( Q ` a ) = <. a , ( 2nd ` ( Q ` a ) ) >. <-> ( Q ` b ) = <. b , ( 2nd ` ( Q ` b ) ) >. ) )
11		fveq2 6191	. . 3 |- ( a = suc b -> ( Q ` a ) = ( Q ` suc b ) )
12		id 22	. . . 4 |- ( a = suc b -> a = suc b )
13	11	fveq2d 6195	. . . 4 |- ( a = suc b -> ( 2nd ` ( Q ` a ) ) = ( 2nd ` ( Q ` suc b ) ) )
14	12, 13	opeq12d 4410	. . 3 |- ( a = suc b -> <. a , ( 2nd ` ( Q ` a ) ) >. = <. suc b , ( 2nd ` ( Q ` suc b ) ) >. )
15	11, 14	eqeq12d 2637	. 2 |- ( a = suc b -> ( ( Q ` a ) = <. a , ( 2nd ` ( Q ` a ) ) >. <-> ( Q ` suc b ) = <. suc b , ( 2nd ` ( Q ` suc b ) ) >. ) )
16		fveq2 6191	. . 3 |- ( a = A -> ( Q ` a ) = ( Q ` A ) )
17		id 22	. . . 4 |- ( a = A -> a = A )
18	16	fveq2d 6195	. . . 4 |- ( a = A -> ( 2nd ` ( Q ` a ) ) = ( 2nd ` ( Q ` A ) ) )
19	17, 18	opeq12d 4410	. . 3 |- ( a = A -> <. a , ( 2nd ` ( Q ` a ) ) >. = <. A , ( 2nd ` ( Q ` A ) ) >. )
20	16, 19	eqeq12d 2637	. 2 |- ( a = A -> ( ( Q ` a ) = <. a , ( 2nd ` ( Q ` a ) ) >. <-> ( Q ` A ) = <. A , ( 2nd ` ( Q ` A ) ) >. ) )
21		seqomlem.a	. . . . 5 |- Q = rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. )
22	21	fveq1i 6192	. . . 4 |- ( Q ` (/) ) = ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) ` (/) )
23		opex 4932	. . . . 5 |- <. (/) , ( _I ` I ) >. e. _V
24	23	rdg0 7517	. . . 4 |- ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) ` (/) ) = <. (/) , ( _I ` I ) >.
25	22, 24	eqtri 2644	. . 3 |- ( Q ` (/) ) = <. (/) , ( _I ` I ) >.
26		0ex 4790	. . . . . . 7 |- (/) e. _V
27		fvex 6201	. . . . . . 7 |- ( _I ` I ) e. _V
28	26, 27	op2nd 7177	. . . . . 6 |- ( 2nd ` <. (/) , ( _I ` I ) >. ) = ( _I ` I )
29	28	eqcomi 2631	. . . . 5 |- ( _I ` I ) = ( 2nd ` <. (/) , ( _I ` I ) >. )
30	29	opeq2i 4406	. . . 4 |- <. (/) , ( _I ` I ) >. = <. (/) , ( 2nd ` <. (/) , ( _I ` I ) >. ) >.
31		id 22	. . . 4 |- ( ( Q ` (/) ) = <. (/) , ( _I ` I ) >. -> ( Q ` (/) ) = <. (/) , ( _I ` I ) >. )
32		fveq2 6191	. . . . 5 |- ( ( Q ` (/) ) = <. (/) , ( _I ` I ) >. -> ( 2nd ` ( Q ` (/) ) ) = ( 2nd ` <. (/) , ( _I ` I ) >. ) )
33	32	opeq2d 4409	. . . 4 |- ( ( Q ` (/) ) = <. (/) , ( _I ` I ) >. -> <. (/) , ( 2nd ` ( Q ` (/) ) ) >. = <. (/) , ( 2nd ` <. (/) , ( _I ` I ) >. ) >. )
34	30, 31, 33	3eqtr4a 2682	. . 3 |- ( ( Q ` (/) ) = <. (/) , ( _I ` I ) >. -> ( Q ` (/) ) = <. (/) , ( 2nd ` ( Q ` (/) ) ) >. )
35	25, 34	ax-mp 5	. 2 |- ( Q ` (/) ) = <. (/) , ( 2nd ` ( Q ` (/) ) ) >.
36		df-ov 6653	. . . . . 6 |- ( b ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ( 2nd ` ( Q ` b ) ) ) = ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` <. b , ( 2nd ` ( Q ` b ) ) >. )
37		fvex 6201	. . . . . . 7 |- ( 2nd ` ( Q ` b ) ) e. _V
38		suceq 5790	. . . . . . . . 9 |- ( i = b -> suc i = suc b )
39		oveq1 6657	. . . . . . . . 9 |- ( i = b -> ( i F v ) = ( b F v ) )
40	38, 39	opeq12d 4410	. . . . . . . 8 |- ( i = b -> <. suc i , ( i F v ) >. = <. suc b , ( b F v ) >. )
41		oveq2 6658	. . . . . . . . 9 |- ( v = ( 2nd ` ( Q ` b ) ) -> ( b F v ) = ( b F ( 2nd ` ( Q ` b ) ) ) )
42	41	opeq2d 4409	. . . . . . . 8 |- ( v = ( 2nd ` ( Q ` b ) ) -> <. suc b , ( b F v ) >. = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. )
43		eqid 2622	. . . . . . . 8 |- ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) = ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. )
44		opex 4932	. . . . . . . 8 |- <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. e. _V
45	40, 42, 43, 44	ovmpt2 6796	. . . . . . 7 |- ( ( b e. om /\ ( 2nd ` ( Q ` b ) ) e. _V ) -> ( b ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ( 2nd ` ( Q ` b ) ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. )
46	37, 45	mpan2 707	. . . . . 6 |- ( b e. om -> ( b ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ( 2nd ` ( Q ` b ) ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. )
47	36, 46	syl5eqr 2670	. . . . 5 |- ( b e. om -> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` <. b , ( 2nd ` ( Q ` b ) ) >. ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. )
48		fveq2 6191	. . . . . 6 |- ( ( Q ` b ) = <. b , ( 2nd ` ( Q ` b ) ) >. -> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` <. b , ( 2nd ` ( Q ` b ) ) >. ) )
49	48	eqeq1d 2624	. . . . 5 |- ( ( Q ` b ) = <. b , ( 2nd ` ( Q ` b ) ) >. -> ( ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. <-> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` <. b , ( 2nd ` ( Q ` b ) ) >. ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) )
50	47, 49	syl5ibrcom 237	. . . 4 |- ( b e. om -> ( ( Q ` b ) = <. b , ( 2nd ` ( Q ` b ) ) >. -> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) )
51		vex 3203	. . . . . . . . . 10 |- b e. _V
52	51	sucex 7011	. . . . . . . . 9 |- suc b e. _V
53		ovex 6678	. . . . . . . . 9 |- ( b F ( 2nd ` ( Q ` b ) ) ) e. _V
54	52, 53	op2nd 7177	. . . . . . . 8 |- ( 2nd ` <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) = ( b F ( 2nd ` ( Q ` b ) ) )
55	54	eqcomi 2631	. . . . . . 7 |- ( b F ( 2nd ` ( Q ` b ) ) ) = ( 2nd ` <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. )
56	55	a1i 11	. . . . . 6 |- ( b e. om -> ( b F ( 2nd ` ( Q ` b ) ) ) = ( 2nd ` <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) )
57	56	opeq2d 4409	. . . . 5 |- ( b e. om -> <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. = <. suc b , ( 2nd ` <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) >. )
58		id 22	. . . . . 6 |- ( ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. -> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. )
59		fveq2 6191	. . . . . . 7 |- ( ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. -> ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) = ( 2nd ` <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) )
60	59	opeq2d 4409	. . . . . 6 |- ( ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. -> <. suc b , ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) >. = <. suc b , ( 2nd ` <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) >. )
61	58, 60	eqeq12d 2637	. . . . 5 |- ( ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. -> ( ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) >. <-> <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. = <. suc b , ( 2nd ` <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. ) >. ) )
62	57, 61	syl5ibrcom 237	. . . 4 |- ( b e. om -> ( ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( b F ( 2nd ` ( Q ` b ) ) ) >. -> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) >. ) )
63	50, 62	syld 47	. . 3 |- ( b e. om -> ( ( Q ` b ) = <. b , ( 2nd ` ( Q ` b ) ) >. -> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) >. ) )
64		frsuc 7532	. . . . 5 |- ( b e. om -> ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` suc b ) = ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` b ) ) )
65		peano2 7086	. . . . . . 7 |- ( b e. om -> suc b e. om )
66		fvres 6207	. . . . . . 7 |- ( suc b e. om -> ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` suc b ) = ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) ` suc b ) )
67	65, 66	syl 17	. . . . . 6 |- ( b e. om -> ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` suc b ) = ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) ` suc b ) )
68	21	fveq1i 6192	. . . . . 6 |- ( Q ` suc b ) = ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) ` suc b )
69	67, 68	syl6eqr 2674	. . . . 5 |- ( b e. om -> ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` suc b ) = ( Q ` suc b ) )
70		fvres 6207	. . . . . . 7 |- ( b e. om -> ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` b ) = ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) ` b ) )
71	21	fveq1i 6192	. . . . . . 7 |- ( Q ` b ) = ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) ` b )
72	70, 71	syl6eqr 2674	. . . . . 6 |- ( b e. om -> ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` b ) = ( Q ` b ) )
73	72	fveq2d 6195	. . . . 5 |- ( b e. om -> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( ( rec ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) , <. (/) , ( _I ` I ) >. ) |` om ) ` b ) ) = ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) )
74	64, 69, 73	3eqtr3d 2664	. . . 4 |- ( b e. om -> ( Q ` suc b ) = ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) )
75	74	fveq2d 6195	. . . . 5 |- ( b e. om -> ( 2nd ` ( Q ` suc b ) ) = ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) )
76	75	opeq2d 4409	. . . 4 |- ( b e. om -> <. suc b , ( 2nd ` ( Q ` suc b ) ) >. = <. suc b , ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) >. )
77	74, 76	eqeq12d 2637	. . 3 |- ( b e. om -> ( ( Q ` suc b ) = <. suc b , ( 2nd ` ( Q ` suc b ) ) >. <-> ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) = <. suc b , ( 2nd ` ( ( i e. om , v e. _V |-> <. suc i , ( i F v ) >. ) ` ( Q ` b ) ) ) >. ) )
78	63, 77	sylibrd 249	. 2 |- ( b e. om -> ( ( Q ` b ) = <. b , ( 2nd ` ( Q ` b ) ) >. -> ( Q ` suc b ) = <. suc b , ( 2nd ` ( Q ` suc b ) ) >. ) )
79	5, 10, 15, 20, 35, 78	finds 7092	1 |- ( A e. om -> ( Q ` A ) = <. A , ( 2nd ` ( Q ` A ) ) >. )

Syntax hints:   -> wi 4   = wceq 1483   e. wcel 1990   _Vcvv 3200   (/)c0 3915   <.cop 4183   _I cid 5023   |` cres 5116   suc csuc 5725   ` cfv 5888  (class class class)co 6650   |-> cmpt2 6652   omcom 7065   2ndc2nd 7167   reccrdg 7505

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-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506

This theorem is referenced by:  seqomlem2  7546  seqomlem4  7548