Theorem dedekindeulemeu 15646

Description: Lemma for dedekindeu 15647. Part of proving uniqueness. (Contributed by Jim Kingdon, 31-Jan-2024.)

Hypotheses

Ref	Expression
dedekindeu.lss	|- ( ph -> L C_ RR )
dedekindeu.uss	|- ( ph -> U C_ RR )
dedekindeu.lm	|- ( ph -> E. q e. RR q e. L )
dedekindeu.um	|- ( ph -> E. r e. RR r e. U )
dedekindeu.lr	|- ( ph -> A. q e. RR ( q e. L <-> E. r e. L q < r ) )
dedekindeu.ur	|- ( ph -> A. r e. RR ( r e. U <-> E. q e. U q < r ) )
dedekindeu.disj	|- ( ph -> ( L i^i U ) = (/) )
dedekindeu.loc	|- ( ph -> A. q e. RR A. r e. RR ( q < r -> ( q e. L \/ r e. U ) ) )
dedekindeulemeu.are	|- ( ph -> A e. RR )
dedekindeulemeu.ac	|- ( ph -> ( A. q e. L q < A /\ A. r e. U A < r ) )
dedekindeulemeu.bre	|- ( ph -> B e. RR )
dedekindeulemeu.bc	|- ( ph -> ( A. q e. L q < B /\ A. r e. U B < r ) )
dedekindeulemeu.lt	|- ( ph -> A < B )

Assertion

Ref	Expression
dedekindeulemeu	|- ( ph -> F. )

Distinct variable groups:   A, q, r   B, r   L, q, r   U, q, r

Allowed substitution hints:   ph( r, q)   B( q)

Proof of Theorem dedekindeulemeu

Step	Hyp	Ref	Expression
1		breq1 4128	. . . 4 |- ( q = A -> ( q < A <-> A < A ) )
2		dedekindeulemeu.ac	. . . . . 6 |- ( ph -> ( A. q e. L q < A /\ A. r e. U A < r ) )
3	2	simpld 112	. . . . 5 |- ( ph -> A. q e. L q < A )
4	3	adantr 276	. . . 4 |- ( ( ph /\ A e. L ) -> A. q e. L q < A )
5		simpr 110	. . . 4 |- ( ( ph /\ A e. L ) -> A e. L )
6	1, 4, 5	rspcdva 2934	. . 3 |- ( ( ph /\ A e. L ) -> A < A )
7		dedekindeulemeu.are	. . . . 5 |- ( ph -> A e. RR )
8	7	ltnrd 8427	. . . 4 |- ( ph -> -. A < A )
9	8	adantr 276	. . 3 |- ( ( ph /\ A e. L ) -> -. A < A )
10	6, 9	pm2.21fal 1422	. 2 |- ( ( ph /\ A e. L ) -> F. )
11		breq2 4129	. . . 4 |- ( r = B -> ( B < r <-> B < B ) )
12		dedekindeulemeu.bc	. . . . . 6 |- ( ph -> ( A. q e. L q < B /\ A. r e. U B < r ) )
13	12	simprd 114	. . . . 5 |- ( ph -> A. r e. U B < r )
14	13	adantr 276	. . . 4 |- ( ( ph /\ B e. U ) -> A. r e. U B < r )
15		simpr 110	. . . 4 |- ( ( ph /\ B e. U ) -> B e. U )
16	11, 14, 15	rspcdva 2934	. . 3 |- ( ( ph /\ B e. U ) -> B < B )
17		dedekindeulemeu.bre	. . . . 5 |- ( ph -> B e. RR )
18	17	ltnrd 8427	. . . 4 |- ( ph -> -. B < B )
19	18	adantr 276	. . 3 |- ( ( ph /\ B e. U ) -> -. B < B )
20	16, 19	pm2.21fal 1422	. 2 |- ( ( ph /\ B e. U ) -> F. )
21		dedekindeulemeu.lt	. . 3 |- ( ph -> A < B )
22		breq2 4129	. . . . 5 |- ( r = B -> ( A < r <-> A < B ) )
23		eleq1 2301	. . . . . 6 |- ( r = B -> ( r e. U <-> B e. U ) )
24	23	orbi2d 802	. . . . 5 |- ( r = B -> ( ( A e. L \/ r e. U ) <-> ( A e. L \/ B e. U ) ) )
25	22, 24	imbi12d 234	. . . 4 |- ( r = B -> ( ( A < r -> ( A e. L \/ r e. U ) ) <-> ( A < B -> ( A e. L \/ B e. U ) ) ) )
26		breq1 4128	. . . . . . 7 |- ( q = A -> ( q < r <-> A < r ) )
27		eleq1 2301	. . . . . . . 8 |- ( q = A -> ( q e. L <-> A e. L ) )
28	27	orbi1d 803	. . . . . . 7 |- ( q = A -> ( ( q e. L \/ r e. U ) <-> ( A e. L \/ r e. U ) ) )
29	26, 28	imbi12d 234	. . . . . 6 |- ( q = A -> ( ( q < r -> ( q e. L \/ r e. U ) ) <-> ( A < r -> ( A e. L \/ r e. U ) ) ) )
30	29	ralbidv 2550	. . . . 5 |- ( q = A -> ( A. r e. RR ( q < r -> ( q e. L \/ r e. U ) ) <-> A. r e. RR ( A < r -> ( A e. L \/ r e. U ) ) ) )
31		dedekindeu.loc	. . . . 5 |- ( ph -> A. q e. RR A. r e. RR ( q < r -> ( q e. L \/ r e. U ) ) )
32	30, 31, 7	rspcdva 2934	. . . 4 |- ( ph -> A. r e. RR ( A < r -> ( A e. L \/ r e. U ) ) )
33	25, 32, 17	rspcdva 2934	. . 3 |- ( ph -> ( A < B -> ( A e. L \/ B e. U ) ) )
34	21, 33	mpd 13	. 2 |- ( ph -> ( A e. L \/ B e. U ) )
35	10, 20, 34	mpjaodan 810	1 |- ( ph -> F. )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 720   = wceq 1402   F. wfal 1407   e. wcel 2209   A.wral 2528   E.wrex 2529   i^i cin 3219   C_ wss 3220   (/)c0 3520   class class class wbr 4125   RRcr 8168   < clt 8350

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-pre-ltirr 8281

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-br 4126  df-opab 4188  df-xp 4775  df-pnf 8352  df-mnf 8353  df-ltxr 8355

This theorem is referenced by:  dedekindeu  15647