Theorem sotric 5061

Description: A strict order relation satisfies strict trichotomy. (Contributed by NM, 19-Feb-1996.)

Assertion

Ref	Expression
sotric	|- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( B R C <-> -. ( B = C \/ C R B ) ) )

Proof of Theorem sotric

Step	Hyp	Ref	Expression
1		sonr 5056	. . . . . 6 |- ( ( R Or A /\ B e. A ) -> -. B R B )
2		breq2 4657	. . . . . . 7 |- ( B = C -> ( B R B <-> B R C ) )
3	2	notbid 308	. . . . . 6 |- ( B = C -> ( -. B R B <-> -. B R C ) )
4	1, 3	syl5ibcom 235	. . . . 5 |- ( ( R Or A /\ B e. A ) -> ( B = C -> -. B R C ) )
5	4	adantrr 753	. . . 4 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( B = C -> -. B R C ) )
6		so2nr 5059	. . . . . 6 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> -. ( B R C /\ C R B ) )
7		imnan 438	. . . . . 6 |- ( ( B R C -> -. C R B ) <-> -. ( B R C /\ C R B ) )
8	6, 7	sylibr 224	. . . . 5 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( B R C -> -. C R B ) )
9	8	con2d 129	. . . 4 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( C R B -> -. B R C ) )
10	5, 9	jaod 395	. . 3 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( ( B = C \/ C R B ) -> -. B R C ) )
11		solin 5058	. . . . 5 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( B R C \/ B = C \/ C R B ) )
12		3orass 1040	. . . . 5 |- ( ( B R C \/ B = C \/ C R B ) <-> ( B R C \/ ( B = C \/ C R B ) ) )
13	11, 12	sylib 208	. . . 4 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( B R C \/ ( B = C \/ C R B ) ) )
14	13	ord 392	. . 3 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( -. B R C -> ( B = C \/ C R B ) ) )
15	10, 14	impbid 202	. 2 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( ( B = C \/ C R B ) <-> -. B R C ) )
16	15	con2bid 344	1 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( B R C <-> -. ( B = C \/ C R B ) ) )

Syntax hints:   -. wn 3   -> wi 4   <-> wb 196   \/ wo 383   /\ wa 384   \/ w3o 1036   = wceq 1483   e. wcel 1990   class class class wbr 4653   Or wor 5034

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-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602

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-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-po 5035  df-so 5036

This theorem is referenced by:  sotr2  5064  sotri2  5525  sotri3  5526  somin1  5529  somincom  5530  soisores  6577  soisoi  6578  fimaxg  8207  suplub2  8367  supgtoreq  8376  fiming  8404  ordtypelem7  8429  fpwwe2  9465  indpi  9729  nqereu  9751  ltsonq  9791  prub  9816  ltapr  9867  suplem2pr  9875  ltsosr  9915  axpre-lttri  9986  sotr3  31656  soasym  31657  noetalem3  31865  sleloe  31879