Theorem suplocexprlemmu 7901

Description: Lemma for suplocexpr 7908. The upper cut of the putative supremum is inhabited. (Contributed by Jim Kingdon, 7-Jan-2024.)

Hypotheses

Ref	Expression
suplocexpr.m	|- ( ph -> E. x x e. A )
suplocexpr.ub	|- ( ph -> E. x e. P. A. y e. A y <P x )
suplocexpr.loc	|- ( ph -> A. x e. P. A. y e. P. ( x <P y -> ( E. z e. A x <P z \/ A. z e. A z <P y ) ) )
suplocexpr.b	|- B = <. U. ( 1st " A ) , { u e. Q. | E. w e. |^| ( 2nd " A ) w <Q u } >.

Assertion

Ref	Expression
suplocexprlemmu	|- ( ph -> E. s e. Q. s e. ( 2nd ` B ) )

Distinct variable groups:   A, s, u, w   x, A, y, s, u   B, s   ph, s, u, x, y

Allowed substitution hints:   ph( z, w)   A( z)   B( x, y, z, w, u)

Proof of Theorem suplocexprlemmu

Dummy variables j t are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		suplocexpr.ub	. . . 4 |- ( ph -> E. x e. P. A. y e. A y <P x )
2		prop 7658	. . . . . . 7 |- ( x e. P. -> <. ( 1st ` x ) , ( 2nd ` x ) >. e. P. )
3		prmu 7661	. . . . . . 7 |- ( <. ( 1st ` x ) , ( 2nd ` x ) >. e. P. -> E. s e. Q. s e. ( 2nd ` x ) )
4	2, 3	syl 14	. . . . . 6 |- ( x e. P. -> E. s e. Q. s e. ( 2nd ` x ) )
5	4	ad2antrl 490	. . . . 5 |- ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) -> E. s e. Q. s e. ( 2nd ` x ) )
6		fo2nd 6302	. . . . . . . . . . . . 13 |- 2nd : _V -onto-> _V
7		fofun 5548	. . . . . . . . . . . . 13 |- ( 2nd : _V -onto-> _V -> Fun 2nd )
8	6, 7	ax-mp 5	. . . . . . . . . . . 12 |- Fun 2nd
9		fvelima 5684	. . . . . . . . . . . 12 |- ( ( Fun 2nd /\ t e. ( 2nd " A ) ) -> E. u e. A ( 2nd ` u ) = t )
10	8, 9	mpan 424	. . . . . . . . . . 11 |- ( t e. ( 2nd " A ) -> E. u e. A ( 2nd ` u ) = t )
11	10	adantl 277	. . . . . . . . . 10 |- ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) -> E. u e. A ( 2nd ` u ) = t )
12		suplocexpr.m	. . . . . . . . . . . . . . . 16 |- ( ph -> E. x x e. A )
13		suplocexpr.loc	. . . . . . . . . . . . . . . 16 |- ( ph -> A. x e. P. A. y e. P. ( x <P y -> ( E. z e. A x <P z \/ A. z e. A z <P y ) ) )
14	12, 1, 13	suplocexprlemss 7898	. . . . . . . . . . . . . . 15 |- ( ph -> A C_ P. )
15	14	ad5antr 496	. . . . . . . . . . . . . 14 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> A C_ P. )
16		simprl 529	. . . . . . . . . . . . . 14 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> u e. A )
17	15, 16	sseldd 3225	. . . . . . . . . . . . 13 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> u e. P. )
18		simprl 529	. . . . . . . . . . . . . 14 |- ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) -> x e. P. )
19	18	ad4antr 494	. . . . . . . . . . . . 13 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> x e. P. )
20		breq1 4085	. . . . . . . . . . . . . . 15 |- ( y = u -> ( y <P x <-> u <P x ) )
21		simprr 531	. . . . . . . . . . . . . . . 16 |- ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) -> A. y e. A y <P x )
22	21	ad4antr 494	. . . . . . . . . . . . . . 15 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> A. y e. A y <P x )
23	20, 22, 16	rspcdva 2912	. . . . . . . . . . . . . 14 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> u <P x )
24		ltsopr 7779	. . . . . . . . . . . . . . . . 17 |- <P Or P.
25		so2nr 4411	. . . . . . . . . . . . . . . . 17 |- ( ( <P Or P. /\ ( u e. P. /\ x e. P. ) ) -> -. ( u <P x /\ x <P u ) )
26	24, 25	mpan 424	. . . . . . . . . . . . . . . 16 |- ( ( u e. P. /\ x e. P. ) -> -. ( u <P x /\ x <P u ) )
27	17, 19, 26	syl2anc 411	. . . . . . . . . . . . . . 15 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> -. ( u <P x /\ x <P u ) )
28		imnan 694	. . . . . . . . . . . . . . 15 |- ( ( u <P x -> -. x <P u ) <-> -. ( u <P x /\ x <P u ) )
29	27, 28	sylibr 134	. . . . . . . . . . . . . 14 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> ( u <P x -> -. x <P u ) )
30	23, 29	mpd 13	. . . . . . . . . . . . 13 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> -. x <P u )
31		aptiprlemu 7823	. . . . . . . . . . . . 13 |- ( ( u e. P. /\ x e. P. /\ -. x <P u ) -> ( 2nd ` x ) C_ ( 2nd ` u ) )
32	17, 19, 30, 31	syl3anc 1271	. . . . . . . . . . . 12 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> ( 2nd ` x ) C_ ( 2nd ` u ) )
33		simpllr 534	. . . . . . . . . . . 12 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> s e. ( 2nd ` x ) )
34	32, 33	sseldd 3225	. . . . . . . . . . 11 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> s e. ( 2nd ` u ) )
35		simprr 531	. . . . . . . . . . 11 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> ( 2nd ` u ) = t )
36	34, 35	eleqtrd 2308	. . . . . . . . . 10 |- ( ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) /\ ( u e. A /\ ( 2nd ` u ) = t ) ) -> s e. t )
37	11, 36	rexlimddv 2653	. . . . . . . . 9 |- ( ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) /\ t e. ( 2nd " A ) ) -> s e. t )
38	37	ralrimiva 2603	. . . . . . . 8 |- ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) -> A. t e. ( 2nd " A ) s e. t )
39		vex 2802	. . . . . . . . 9 |- s e. _V
40	39	elint2 3929	. . . . . . . 8 |- ( s e. |^| ( 2nd " A ) <-> A. t e. ( 2nd " A ) s e. t )
41	38, 40	sylibr 134	. . . . . . 7 |- ( ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) /\ s e. ( 2nd ` x ) ) -> s e. |^| ( 2nd " A ) )
42	41	ex 115	. . . . . 6 |- ( ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) /\ s e. Q. ) -> ( s e. ( 2nd ` x ) -> s e. |^| ( 2nd " A ) ) )
43	42	reximdva 2632	. . . . 5 |- ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) -> ( E. s e. Q. s e. ( 2nd ` x ) -> E. s e. Q. s e. |^| ( 2nd " A ) ) )
44	5, 43	mpd 13	. . . 4 |- ( ( ph /\ ( x e. P. /\ A. y e. A y <P x ) ) -> E. s e. Q. s e. |^| ( 2nd " A ) )
45	1, 44	rexlimddv 2653	. . 3 |- ( ph -> E. s e. Q. s e. |^| ( 2nd " A ) )
46		simprr 531	. . . . . . 7 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> s e. |^| ( 2nd " A ) )
47		simprl 529	. . . . . . . . 9 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> s e. Q. )
48		1nq 7549	. . . . . . . . 9 |- 1Q e. Q.
49		addclnq 7558	. . . . . . . . 9 |- ( ( s e. Q. /\ 1Q e. Q. ) -> ( s +Q 1Q ) e. Q. )
50	47, 48, 49	sylancl 413	. . . . . . . 8 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> ( s +Q 1Q ) e. Q. )
51		ltaddnq 7590	. . . . . . . . 9 |- ( ( s e. Q. /\ 1Q e. Q. ) -> s <Q ( s +Q 1Q ) )
52	47, 48, 51	sylancl 413	. . . . . . . 8 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> s <Q ( s +Q 1Q ) )
53		breq2 4086	. . . . . . . . 9 |- ( j = ( s +Q 1Q ) -> ( s <Q j <-> s <Q ( s +Q 1Q ) ) )
54	53	rspcev 2907	. . . . . . . 8 |- ( ( ( s +Q 1Q ) e. Q. /\ s <Q ( s +Q 1Q ) ) -> E. j e. Q. s <Q j )
55	50, 52, 54	syl2anc 411	. . . . . . 7 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> E. j e. Q. s <Q j )
56		breq1 4085	. . . . . . . . 9 |- ( w = s -> ( w <Q j <-> s <Q j ) )
57	56	rexbidv 2531	. . . . . . . 8 |- ( w = s -> ( E. j e. Q. w <Q j <-> E. j e. Q. s <Q j ) )
58	57	rspcev 2907	. . . . . . 7 |- ( ( s e. |^| ( 2nd " A ) /\ E. j e. Q. s <Q j ) -> E. w e. |^| ( 2nd " A ) E. j e. Q. w <Q j )
59	46, 55, 58	syl2anc 411	. . . . . 6 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> E. w e. |^| ( 2nd " A ) E. j e. Q. w <Q j )
60		rexcom 2695	. . . . . 6 |- ( E. w e. |^| ( 2nd " A ) E. j e. Q. w <Q j <-> E. j e. Q. E. w e. |^| ( 2nd " A ) w <Q j )
61	59, 60	sylib 122	. . . . 5 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> E. j e. Q. E. w e. |^| ( 2nd " A ) w <Q j )
62		ssid 3244	. . . . . 6 |- Q. C_ Q.
63		rexss 3291	. . . . . 6 |- ( Q. C_ Q. -> ( E. j e. Q. E. w e. |^| ( 2nd " A ) w <Q j <-> E. j e. Q. ( j e. Q. /\ E. w e. |^| ( 2nd " A ) w <Q j ) ) )
64	62, 63	ax-mp 5	. . . . 5 |- ( E. j e. Q. E. w e. |^| ( 2nd " A ) w <Q j <-> E. j e. Q. ( j e. Q. /\ E. w e. |^| ( 2nd " A ) w <Q j ) )
65	61, 64	sylib 122	. . . 4 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> E. j e. Q. ( j e. Q. /\ E. w e. |^| ( 2nd " A ) w <Q j ) )
66		suplocexpr.b	. . . . . . . . . 10 |- B = <. U. ( 1st " A ) , { u e. Q. | E. w e. |^| ( 2nd " A ) w <Q u } >.
67	66	suplocexprlem2b 7897	. . . . . . . . 9 |- ( A C_ P. -> ( 2nd ` B ) = { u e. Q. | E. w e. |^| ( 2nd " A ) w <Q u } )
68	14, 67	syl 14	. . . . . . . 8 |- ( ph -> ( 2nd ` B ) = { u e. Q. | E. w e. |^| ( 2nd " A ) w <Q u } )
69	68	eleq2d 2299	. . . . . . 7 |- ( ph -> ( j e. ( 2nd ` B ) <-> j e. { u e. Q. | E. w e. |^| ( 2nd " A ) w <Q u } ) )
70		breq2 4086	. . . . . . . . 9 |- ( u = j -> ( w <Q u <-> w <Q j ) )
71	70	rexbidv 2531	. . . . . . . 8 |- ( u = j -> ( E. w e. |^| ( 2nd " A ) w <Q u <-> E. w e. |^| ( 2nd " A ) w <Q j ) )
72	71	elrab 2959	. . . . . . 7 |- ( j e. { u e. Q. | E. w e. |^| ( 2nd " A ) w <Q u } <-> ( j e. Q. /\ E. w e. |^| ( 2nd " A ) w <Q j ) )
73	69, 72	bitrdi 196	. . . . . 6 |- ( ph -> ( j e. ( 2nd ` B ) <-> ( j e. Q. /\ E. w e. |^| ( 2nd " A ) w <Q j ) ) )
74	73	rexbidv 2531	. . . . 5 |- ( ph -> ( E. j e. Q. j e. ( 2nd ` B ) <-> E. j e. Q. ( j e. Q. /\ E. w e. |^| ( 2nd " A ) w <Q j ) ) )
75	74	adantr 276	. . . 4 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> ( E. j e. Q. j e. ( 2nd ` B ) <-> E. j e. Q. ( j e. Q. /\ E. w e. |^| ( 2nd " A ) w <Q j ) ) )
76	65, 75	mpbird 167	. . 3 |- ( ( ph /\ ( s e. Q. /\ s e. |^| ( 2nd " A ) ) ) -> E. j e. Q. j e. ( 2nd ` B ) )
77	45, 76	rexlimddv 2653	. 2 |- ( ph -> E. j e. Q. j e. ( 2nd ` B ) )
78		eleq1w 2290	. . 3 |- ( j = s -> ( j e. ( 2nd ` B ) <-> s e. ( 2nd ` B ) ) )
79	78	cbvrexv 2766	. 2 |- ( E. j e. Q. j e. ( 2nd ` B ) <-> E. s e. Q. s e. ( 2nd ` B ) )
80	77, 79	sylib 122	1 |- ( ph -> E. s e. Q. s e. ( 2nd ` B ) )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 713   = wceq 1395   E.wex 1538   e. wcel 2200   A.wral 2508   E.wrex 2509   {crab 2512   _Vcvv 2799   C_ wss 3197   <.cop 3669   U.cuni 3887   |^|cint 3922   class class class wbr 4082   Or wor 4385   "cima 4721   Fun wfun 5311   -onto->wfo 5315   ` cfv 5317  (class class class)co 6000   1stc1st 6282   2ndc2nd 6283   Q.cnq 7463   1Qc1q 7464   +Q cplq 7465   <Q cltq 7468   P.cnp 7474   <P cltp 7478

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4198  ax-sep 4201  ax-nul 4209  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-setind 4628  ax-iinf 4679

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-iun 3966  df-br 4083  df-opab 4145  df-mpt 4146  df-tr 4182  df-eprel 4379  df-id 4383  df-po 4386  df-iso 4387  df-iord 4456  df-on 4458  df-suc 4461  df-iom 4682  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-rn 4729  df-res 4730  df-ima 4731  df-iota 5277  df-fun 5319  df-fn 5320  df-f 5321  df-f1 5322  df-fo 5323  df-f1o 5324  df-fv 5325  df-ov 6003  df-oprab 6004  df-mpo 6005  df-1st 6284  df-2nd 6285  df-recs 6449  df-irdg 6514  df-1o 6560  df-2o 6561  df-oadd 6564  df-omul 6565  df-er 6678  df-ec 6680  df-qs 6684  df-ni 7487  df-pli 7488  df-mi 7489  df-lti 7490  df-plpq 7527  df-mpq 7528  df-enq 7530  df-nqqs 7531  df-plqqs 7532  df-mqqs 7533  df-1nqqs 7534  df-rq 7535  df-ltnqqs 7536  df-enq0 7607  df-nq0 7608  df-0nq0 7609  df-plq0 7610  df-mq0 7611  df-inp 7649  df-iltp 7653

This theorem is referenced by:  suplocexprlemex  7905