Theorem solin 5058

Description: A strict order relation is linear (satisfies trichotomy). (Contributed by NM, 21-Jan-1996.)

Assertion

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

Proof of Theorem solin

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		breq1 4656	. . . . 5 |- ( x = B -> ( x R y <-> B R y ) )
2		eqeq1 2626	. . . . 5 |- ( x = B -> ( x = y <-> B = y ) )
3		breq2 4657	. . . . 5 |- ( x = B -> ( y R x <-> y R B ) )
4	1, 2, 3	3orbi123d 1398	. . . 4 |- ( x = B -> ( ( x R y \/ x = y \/ y R x ) <-> ( B R y \/ B = y \/ y R B ) ) )
5	4	imbi2d 330	. . 3 |- ( x = B -> ( ( R Or A -> ( x R y \/ x = y \/ y R x ) ) <-> ( R Or A -> ( B R y \/ B = y \/ y R B ) ) ) )
6		breq2 4657	. . . . 5 |- ( y = C -> ( B R y <-> B R C ) )
7		eqeq2 2633	. . . . 5 |- ( y = C -> ( B = y <-> B = C ) )
8		breq1 4656	. . . . 5 |- ( y = C -> ( y R B <-> C R B ) )
9	6, 7, 8	3orbi123d 1398	. . . 4 |- ( y = C -> ( ( B R y \/ B = y \/ y R B ) <-> ( B R C \/ B = C \/ C R B ) ) )
10	9	imbi2d 330	. . 3 |- ( y = C -> ( ( R Or A -> ( B R y \/ B = y \/ y R B ) ) <-> ( R Or A -> ( B R C \/ B = C \/ C R B ) ) ) )
11		df-so 5036	. . . . 5 |- ( R Or A <-> ( R Po A /\ A. x e. A A. y e. A ( x R y \/ x = y \/ y R x ) ) )
12		rsp2 2936	. . . . 5 |- ( A. x e. A A. y e. A ( x R y \/ x = y \/ y R x ) -> ( ( x e. A /\ y e. A ) -> ( x R y \/ x = y \/ y R x ) ) )
13	11, 12	simplbiim 659	. . . 4 |- ( R Or A -> ( ( x e. A /\ y e. A ) -> ( x R y \/ x = y \/ y R x ) ) )
14	13	com12 32	. . 3 |- ( ( x e. A /\ y e. A ) -> ( R Or A -> ( x R y \/ x = y \/ y R x ) ) )
15	5, 10, 14	vtocl2ga 3274	. 2 |- ( ( B e. A /\ C e. A ) -> ( R Or A -> ( B R C \/ B = C \/ C R B ) ) )
16	15	impcom 446	1 |- ( ( R Or A /\ ( B e. A /\ C e. A ) ) -> ( B R C \/ B = C \/ C R B ) )

Syntax hints:   -> wi 4   /\ wa 384   \/ w3o 1036   = wceq 1483   e. wcel 1990   A.wral 2912   class class class wbr 4653   Po wpo 5033   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-so 5036

This theorem is referenced by:  sotric  5061  sotrieq  5062  somo  5069  wecmpep  5106  sorpssi  6943  soxp  7290  wfrlem10  7424  wemaplem2  8452  fpwwe2lem12  9463  fpwwe2lem13  9464  lttri4  10122  xmullem  12094  xmulasslem  12115  orngsqr  29804  noresle  31846  nosupbnd1lem6  31859  sltlin  31874  fin2so  33396  fnwe2lem3  37622