Theorem 1idprl 7905

Description: Lemma for 1idpr 7907. (Contributed by Jim Kingdon, 13-Dec-2019.)

Assertion

Ref	Expression
1idprl	|- ( A e. P. -> ( 1st ` ( A .P. 1P ) ) = ( 1st ` A ) )

Proof of Theorem 1idprl

Dummy variables x y z w v u f g are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ssid 3258	. . . . . 6 |- ( 1st ` 1P ) C_ ( 1st ` 1P )
2		rexss 3305	. . . . . 6 |- ( ( 1st ` 1P ) C_ ( 1st ` 1P ) -> ( E. g e. ( 1st ` 1P ) x = ( f .Q g ) <-> E. g e. ( 1st ` 1P ) ( g e. ( 1st ` 1P ) /\ x = ( f .Q g ) ) ) )
3	1, 2	ax-mp 5	. . . . 5 |- ( E. g e. ( 1st ` 1P ) x = ( f .Q g ) <-> E. g e. ( 1st ` 1P ) ( g e. ( 1st ` 1P ) /\ x = ( f .Q g ) ) )
4		1pr 7869	. . . . . . . . . . 11 |- 1P e. P.
5		prop 7790	. . . . . . . . . . . 12 |- ( 1P e. P. -> <. ( 1st ` 1P ) , ( 2nd ` 1P ) >. e. P. )
6		elprnql 7796	. . . . . . . . . . . 12 |- ( ( <. ( 1st ` 1P ) , ( 2nd ` 1P ) >. e. P. /\ g e. ( 1st ` 1P ) ) -> g e. Q. )
7	5, 6	sylan 283	. . . . . . . . . . 11 |- ( ( 1P e. P. /\ g e. ( 1st ` 1P ) ) -> g e. Q. )
8	4, 7	mpan 424	. . . . . . . . . 10 |- ( g e. ( 1st ` 1P ) -> g e. Q. )
9		prop 7790	. . . . . . . . . . . 12 |- ( A e. P. -> <. ( 1st ` A ) , ( 2nd ` A ) >. e. P. )
10		elprnql 7796	. . . . . . . . . . . 12 |- ( ( <. ( 1st ` A ) , ( 2nd ` A ) >. e. P. /\ f e. ( 1st ` A ) ) -> f e. Q. )
11	9, 10	sylan 283	. . . . . . . . . . 11 |- ( ( A e. P. /\ f e. ( 1st ` A ) ) -> f e. Q. )
12		breq1 4112	. . . . . . . . . . . . 13 |- ( x = ( f .Q g ) -> ( x <Q f <-> ( f .Q g ) <Q f ) )
13	12	3ad2ant3 1047	. . . . . . . . . . . 12 |- ( ( f e. Q. /\ g e. Q. /\ x = ( f .Q g ) ) -> ( x <Q f <-> ( f .Q g ) <Q f ) )
14		1prl 7870	. . . . . . . . . . . . . . 15 |- ( 1st ` 1P ) = { g | g <Q 1Q }
15	14	abeq2i 2343	. . . . . . . . . . . . . 14 |- ( g e. ( 1st ` 1P ) <-> g <Q 1Q )
16		1nq 7681	. . . . . . . . . . . . . . . . 17 |- 1Q e. Q.
17		ltmnqg 7716	. . . . . . . . . . . . . . . . 17 |- ( ( g e. Q. /\ 1Q e. Q. /\ f e. Q. ) -> ( g <Q 1Q <-> ( f .Q g ) <Q ( f .Q 1Q ) ) )
18	16, 17	mp3an2 1362	. . . . . . . . . . . . . . . 16 |- ( ( g e. Q. /\ f e. Q. ) -> ( g <Q 1Q <-> ( f .Q g ) <Q ( f .Q 1Q ) ) )
19	18	ancoms 268	. . . . . . . . . . . . . . 15 |- ( ( f e. Q. /\ g e. Q. ) -> ( g <Q 1Q <-> ( f .Q g ) <Q ( f .Q 1Q ) ) )
20		mulidnq 7704	. . . . . . . . . . . . . . . . 17 |- ( f e. Q. -> ( f .Q 1Q ) = f )
21	20	breq2d 4121	. . . . . . . . . . . . . . . 16 |- ( f e. Q. -> ( ( f .Q g ) <Q ( f .Q 1Q ) <-> ( f .Q g ) <Q f ) )
22	21	adantr 276	. . . . . . . . . . . . . . 15 |- ( ( f e. Q. /\ g e. Q. ) -> ( ( f .Q g ) <Q ( f .Q 1Q ) <-> ( f .Q g ) <Q f ) )
23	19, 22	bitrd 188	. . . . . . . . . . . . . 14 |- ( ( f e. Q. /\ g e. Q. ) -> ( g <Q 1Q <-> ( f .Q g ) <Q f ) )
24	15, 23	bitr2id 193	. . . . . . . . . . . . 13 |- ( ( f e. Q. /\ g e. Q. ) -> ( ( f .Q g ) <Q f <-> g e. ( 1st ` 1P ) ) )
25	24	3adant3 1044	. . . . . . . . . . . 12 |- ( ( f e. Q. /\ g e. Q. /\ x = ( f .Q g ) ) -> ( ( f .Q g ) <Q f <-> g e. ( 1st ` 1P ) ) )
26	13, 25	bitrd 188	. . . . . . . . . . 11 |- ( ( f e. Q. /\ g e. Q. /\ x = ( f .Q g ) ) -> ( x <Q f <-> g e. ( 1st ` 1P ) ) )
27	11, 26	syl3an1 1307	. . . . . . . . . 10 |- ( ( ( A e. P. /\ f e. ( 1st ` A ) ) /\ g e. Q. /\ x = ( f .Q g ) ) -> ( x <Q f <-> g e. ( 1st ` 1P ) ) )
28	8, 27	syl3an2 1308	. . . . . . . . 9 |- ( ( ( A e. P. /\ f e. ( 1st ` A ) ) /\ g e. ( 1st ` 1P ) /\ x = ( f .Q g ) ) -> ( x <Q f <-> g e. ( 1st ` 1P ) ) )
29	28	3expia 1232	. . . . . . . 8 |- ( ( ( A e. P. /\ f e. ( 1st ` A ) ) /\ g e. ( 1st ` 1P ) ) -> ( x = ( f .Q g ) -> ( x <Q f <-> g e. ( 1st ` 1P ) ) ) )
30	29	pm5.32rd 451	. . . . . . 7 |- ( ( ( A e. P. /\ f e. ( 1st ` A ) ) /\ g e. ( 1st ` 1P ) ) -> ( ( x <Q f /\ x = ( f .Q g ) ) <-> ( g e. ( 1st ` 1P ) /\ x = ( f .Q g ) ) ) )
31	30	rexbidva 2539	. . . . . 6 |- ( ( A e. P. /\ f e. ( 1st ` A ) ) -> ( E. g e. ( 1st ` 1P ) ( x <Q f /\ x = ( f .Q g ) ) <-> E. g e. ( 1st ` 1P ) ( g e. ( 1st ` 1P ) /\ x = ( f .Q g ) ) ) )
32		r19.42v 2700	. . . . . 6 |- ( E. g e. ( 1st ` 1P ) ( x <Q f /\ x = ( f .Q g ) ) <-> ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) )
33	31, 32	bitr3di 195	. . . . 5 |- ( ( A e. P. /\ f e. ( 1st ` A ) ) -> ( E. g e. ( 1st ` 1P ) ( g e. ( 1st ` 1P ) /\ x = ( f .Q g ) ) <-> ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) ) )
34	3, 33	bitrid 192	. . . 4 |- ( ( A e. P. /\ f e. ( 1st ` A ) ) -> ( E. g e. ( 1st ` 1P ) x = ( f .Q g ) <-> ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) ) )
35	34	rexbidva 2539	. . 3 |- ( A e. P. -> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` 1P ) x = ( f .Q g ) <-> E. f e. ( 1st ` A ) ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) ) )
36		df-imp 7784	. . . . 5 |- .P. = ( y e. P. , z e. P. |-> <. { w e. Q. | E. u e. Q. E. v e. Q. ( u e. ( 1st ` y ) /\ v e. ( 1st ` z ) /\ w = ( u .Q v ) ) } , { w e. Q. | E. u e. Q. E. v e. Q. ( u e. ( 2nd ` y ) /\ v e. ( 2nd ` z ) /\ w = ( u .Q v ) ) } >. )
37		mulclnq 7691	. . . . 5 |- ( ( u e. Q. /\ v e. Q. ) -> ( u .Q v ) e. Q. )
38	36, 37	genpelvl 7827	. . . 4 |- ( ( A e. P. /\ 1P e. P. ) -> ( x e. ( 1st ` ( A .P. 1P ) ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) )
39	4, 38	mpan2 425	. . 3 |- ( A e. P. -> ( x e. ( 1st ` ( A .P. 1P ) ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) )
40		prnmaxl 7803	. . . . . . 7 |- ( ( <. ( 1st ` A ) , ( 2nd ` A ) >. e. P. /\ x e. ( 1st ` A ) ) -> E. f e. ( 1st ` A ) x <Q f )
41	9, 40	sylan 283	. . . . . 6 |- ( ( A e. P. /\ x e. ( 1st ` A ) ) -> E. f e. ( 1st ` A ) x <Q f )
42		ltrelnq 7680	. . . . . . . . . . . . 13 |- <Q C_ ( Q. X. Q. )
43	42	brel 4802	. . . . . . . . . . . 12 |- ( x <Q f -> ( x e. Q. /\ f e. Q. ) )
44		ltmnqg 7716	. . . . . . . . . . . . . . . 16 |- ( ( y e. Q. /\ z e. Q. /\ w e. Q. ) -> ( y <Q z <-> ( w .Q y ) <Q ( w .Q z ) ) )
45	44	adantl 277	. . . . . . . . . . . . . . 15 |- ( ( ( x e. Q. /\ f e. Q. ) /\ ( y e. Q. /\ z e. Q. /\ w e. Q. ) ) -> ( y <Q z <-> ( w .Q y ) <Q ( w .Q z ) ) )
46		simpl 109	. . . . . . . . . . . . . . 15 |- ( ( x e. Q. /\ f e. Q. ) -> x e. Q. )
47		simpr 110	. . . . . . . . . . . . . . 15 |- ( ( x e. Q. /\ f e. Q. ) -> f e. Q. )
48		recclnq 7707	. . . . . . . . . . . . . . . 16 |- ( f e. Q. -> ( *Q ` f ) e. Q. )
49	48	adantl 277	. . . . . . . . . . . . . . 15 |- ( ( x e. Q. /\ f e. Q. ) -> ( *Q ` f ) e. Q. )
50		mulcomnqg 7698	. . . . . . . . . . . . . . . 16 |- ( ( y e. Q. /\ z e. Q. ) -> ( y .Q z ) = ( z .Q y ) )
51	50	adantl 277	. . . . . . . . . . . . . . 15 |- ( ( ( x e. Q. /\ f e. Q. ) /\ ( y e. Q. /\ z e. Q. ) ) -> ( y .Q z ) = ( z .Q y ) )
52	45, 46, 47, 49, 51	caovord2d 6224	. . . . . . . . . . . . . 14 |- ( ( x e. Q. /\ f e. Q. ) -> ( x <Q f <-> ( x .Q ( *Q ` f ) ) <Q ( f .Q ( *Q ` f ) ) ) )
53		recidnq 7708	. . . . . . . . . . . . . . . 16 |- ( f e. Q. -> ( f .Q ( *Q ` f ) ) = 1Q )
54	53	breq2d 4121	. . . . . . . . . . . . . . 15 |- ( f e. Q. -> ( ( x .Q ( *Q ` f ) ) <Q ( f .Q ( *Q ` f ) ) <-> ( x .Q ( *Q ` f ) ) <Q 1Q ) )
55	54	adantl 277	. . . . . . . . . . . . . 14 |- ( ( x e. Q. /\ f e. Q. ) -> ( ( x .Q ( *Q ` f ) ) <Q ( f .Q ( *Q ` f ) ) <-> ( x .Q ( *Q ` f ) ) <Q 1Q ) )
56	52, 55	bitrd 188	. . . . . . . . . . . . 13 |- ( ( x e. Q. /\ f e. Q. ) -> ( x <Q f <-> ( x .Q ( *Q ` f ) ) <Q 1Q ) )
57	56	biimpd 144	. . . . . . . . . . . 12 |- ( ( x e. Q. /\ f e. Q. ) -> ( x <Q f -> ( x .Q ( *Q ` f ) ) <Q 1Q ) )
58	43, 57	mpcom 36	. . . . . . . . . . 11 |- ( x <Q f -> ( x .Q ( *Q ` f ) ) <Q 1Q )
59		mulclnq 7691	. . . . . . . . . . . . . 14 |- ( ( x e. Q. /\ ( *Q ` f ) e. Q. ) -> ( x .Q ( *Q ` f ) ) e. Q. )
60	48, 59	sylan2 286	. . . . . . . . . . . . 13 |- ( ( x e. Q. /\ f e. Q. ) -> ( x .Q ( *Q ` f ) ) e. Q. )
61	43, 60	syl 14	. . . . . . . . . . . 12 |- ( x <Q f -> ( x .Q ( *Q ` f ) ) e. Q. )
62		breq1 4112	. . . . . . . . . . . . 13 |- ( g = ( x .Q ( *Q ` f ) ) -> ( g <Q 1Q <-> ( x .Q ( *Q ` f ) ) <Q 1Q ) )
63	62, 14	elab2g 2964	. . . . . . . . . . . 12 |- ( ( x .Q ( *Q ` f ) ) e. Q. -> ( ( x .Q ( *Q ` f ) ) e. ( 1st ` 1P ) <-> ( x .Q ( *Q ` f ) ) <Q 1Q ) )
64	61, 63	syl 14	. . . . . . . . . . 11 |- ( x <Q f -> ( ( x .Q ( *Q ` f ) ) e. ( 1st ` 1P ) <-> ( x .Q ( *Q ` f ) ) <Q 1Q ) )
65	58, 64	mpbird 167	. . . . . . . . . 10 |- ( x <Q f -> ( x .Q ( *Q ` f ) ) e. ( 1st ` 1P ) )
66		mulassnqg 7699	. . . . . . . . . . . . . 14 |- ( ( y e. Q. /\ z e. Q. /\ w e. Q. ) -> ( ( y .Q z ) .Q w ) = ( y .Q ( z .Q w ) ) )
67	66	adantl 277	. . . . . . . . . . . . 13 |- ( ( ( x e. Q. /\ f e. Q. ) /\ ( y e. Q. /\ z e. Q. /\ w e. Q. ) ) -> ( ( y .Q z ) .Q w ) = ( y .Q ( z .Q w ) ) )
68	47, 46, 49, 51, 67	caov12d 6236	. . . . . . . . . . . 12 |- ( ( x e. Q. /\ f e. Q. ) -> ( f .Q ( x .Q ( *Q ` f ) ) ) = ( x .Q ( f .Q ( *Q ` f ) ) ) )
69	53	oveq2d 6066	. . . . . . . . . . . . 13 |- ( f e. Q. -> ( x .Q ( f .Q ( *Q ` f ) ) ) = ( x .Q 1Q ) )
70	69	adantl 277	. . . . . . . . . . . 12 |- ( ( x e. Q. /\ f e. Q. ) -> ( x .Q ( f .Q ( *Q ` f ) ) ) = ( x .Q 1Q ) )
71		mulidnq 7704	. . . . . . . . . . . . 13 |- ( x e. Q. -> ( x .Q 1Q ) = x )
72	71	adantr 276	. . . . . . . . . . . 12 |- ( ( x e. Q. /\ f e. Q. ) -> ( x .Q 1Q ) = x )
73	68, 70, 72	3eqtrrd 2270	. . . . . . . . . . 11 |- ( ( x e. Q. /\ f e. Q. ) -> x = ( f .Q ( x .Q ( *Q ` f ) ) ) )
74	43, 73	syl 14	. . . . . . . . . 10 |- ( x <Q f -> x = ( f .Q ( x .Q ( *Q ` f ) ) ) )
75		oveq2 6058	. . . . . . . . . . . 12 |- ( g = ( x .Q ( *Q ` f ) ) -> ( f .Q g ) = ( f .Q ( x .Q ( *Q ` f ) ) ) )
76	75	eqeq2d 2244	. . . . . . . . . . 11 |- ( g = ( x .Q ( *Q ` f ) ) -> ( x = ( f .Q g ) <-> x = ( f .Q ( x .Q ( *Q ` f ) ) ) ) )
77	76	rspcev 2921	. . . . . . . . . 10 |- ( ( ( x .Q ( *Q ` f ) ) e. ( 1st ` 1P ) /\ x = ( f .Q ( x .Q ( *Q ` f ) ) ) ) -> E. g e. ( 1st ` 1P ) x = ( f .Q g ) )
78	65, 74, 77	syl2anc 411	. . . . . . . . 9 |- ( x <Q f -> E. g e. ( 1st ` 1P ) x = ( f .Q g ) )
79	78	a1i 9	. . . . . . . 8 |- ( f e. ( 1st ` A ) -> ( x <Q f -> E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) )
80	79	ancld 325	. . . . . . 7 |- ( f e. ( 1st ` A ) -> ( x <Q f -> ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) ) )
81	80	reximia 2637	. . . . . 6 |- ( E. f e. ( 1st ` A ) x <Q f -> E. f e. ( 1st ` A ) ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) )
82	41, 81	syl 14	. . . . 5 |- ( ( A e. P. /\ x e. ( 1st ` A ) ) -> E. f e. ( 1st ` A ) ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) )
83	82	ex 115	. . . 4 |- ( A e. P. -> ( x e. ( 1st ` A ) -> E. f e. ( 1st ` A ) ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) ) )
84		prcdnql 7799	. . . . . . 7 |- ( ( <. ( 1st ` A ) , ( 2nd ` A ) >. e. P. /\ f e. ( 1st ` A ) ) -> ( x <Q f -> x e. ( 1st ` A ) ) )
85	9, 84	sylan 283	. . . . . 6 |- ( ( A e. P. /\ f e. ( 1st ` A ) ) -> ( x <Q f -> x e. ( 1st ` A ) ) )
86	85	adantrd 279	. . . . 5 |- ( ( A e. P. /\ f e. ( 1st ` A ) ) -> ( ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) -> x e. ( 1st ` A ) ) )
87	86	rexlimdva 2660	. . . 4 |- ( A e. P. -> ( E. f e. ( 1st ` A ) ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) -> x e. ( 1st ` A ) ) )
88	83, 87	impbid 129	. . 3 |- ( A e. P. -> ( x e. ( 1st ` A ) <-> E. f e. ( 1st ` A ) ( x <Q f /\ E. g e. ( 1st ` 1P ) x = ( f .Q g ) ) ) )
89	35, 39, 88	3bitr4d 220	. 2 |- ( A e. P. -> ( x e. ( 1st ` ( A .P. 1P ) ) <-> x e. ( 1st ` A ) ) )
90	89	eqrdv 2230	1 |- ( A e. P. -> ( 1st ` ( A .P. 1P ) ) = ( 1st ` A ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   /\ w3a 1005   = wceq 1398   e. wcel 2203   E.wrex 2521   C_ wss 3211   <.cop 3692   class class class wbr 4109   ` cfv 5352  (class class class)co 6050   1stc1st 6332   2ndc2nd 6333   Q.cnq 7595   1Qc1q 7596   .Q cmq 7598   *Qcrq 7599   <Q cltq 7600   P.cnp 7606   1Pc1p 7607   .P. cmp 7609

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 619  ax-in2 620  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-coll 4225  ax-sep 4228  ax-nul 4236  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-iinf 4710

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  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-ne 2413  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-nul 3509  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-tr 4209  df-eprel 4410  df-id 4414  df-po 4417  df-iso 4418  df-iord 4487  df-on 4489  df-suc 4492  df-iom 4713  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-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-ov 6053  df-oprab 6054  df-mpo 6055  df-1st 6334  df-2nd 6335  df-recs 6536  df-irdg 6601  df-1o 6647  df-oadd 6651  df-omul 6652  df-er 6767  df-ec 6769  df-qs 6773  df-ni 7619  df-pli 7620  df-mi 7621  df-lti 7622  df-plpq 7659  df-mpq 7660  df-enq 7662  df-nqqs 7663  df-plqqs 7664  df-mqqs 7665  df-1nqqs 7666  df-rq 7667  df-ltnqqs 7668  df-inp 7781  df-i1p 7782  df-imp 7784

This theorem is referenced by:  1idpr  7907