Theorem cvrnbtwn4 36409

Description: The covers relation implies no in-betweenness. Part of proof of Lemma 7.5.1 of [MaedaMaeda] p. 31. (cvnbtwn4 30060 analog.) (Contributed by NM, 18-Oct-2011.)

Hypotheses

Ref	Expression
cvrle.b	⊢ 𝐵 = (Base‘𝐾)
cvrle.l	⊢ ≤ = (le‘𝐾)
cvrle.c	⊢ 𝐶 = ( ⋖ ‘𝐾)

Assertion

Ref	Expression
cvrnbtwn4	⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ↔ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)))

Proof of Theorem cvrnbtwn4

Step	Hyp	Ref	Expression
1		cvrle.b	. . . 4 ⊢ 𝐵 = (Base‘𝐾)
2		eqid 2821	. . . 4 ⊢ (lt‘𝐾) = (lt‘𝐾)
3		cvrle.c	. . . 4 ⊢ 𝐶 = ( ⋖ ‘𝐾)
4	1, 2, 3	cvrnbtwn 36401	. . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ¬ (𝑋(lt‘𝐾)𝑍 ∧ 𝑍(lt‘𝐾)𝑌))
5		iman 404	. . . . 5 ⊢ (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) → (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)) ↔ ¬ ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)))
6		cvrle.l	. . . . . . . . . 10 ⊢ ≤ = (le‘𝐾)
7	6, 2	pltval 17564	. . . . . . . . 9 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋(lt‘𝐾)𝑍 ↔ (𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍)))
8	7	3adant3r2 1179	. . . . . . . 8 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋(lt‘𝐾)𝑍 ↔ (𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍)))
9	6, 2	pltval 17564	. . . . . . . . . 10 ⊢ ((𝐾 ∈ Poset ∧ 𝑍 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑍(lt‘𝐾)𝑌 ↔ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
10	9	3com23 1122	. . . . . . . . 9 ⊢ ((𝐾 ∈ Poset ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑍(lt‘𝐾)𝑌 ↔ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
11	10	3adant3r1 1178	. . . . . . . 8 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑍(lt‘𝐾)𝑌 ↔ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
12	8, 11	anbi12d 632	. . . . . . 7 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋(lt‘𝐾)𝑍 ∧ 𝑍(lt‘𝐾)𝑌) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍) ∧ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌))))
13		neanior 3109	. . . . . . . . 9 ⊢ ((𝑋 ≠ 𝑍 ∧ 𝑍 ≠ 𝑌) ↔ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌))
14	13	anbi2i 624	. . . . . . . 8 ⊢ (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ (𝑋 ≠ 𝑍 ∧ 𝑍 ≠ 𝑌)) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)))
15		an4 654	. . . . . . . 8 ⊢ (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ (𝑋 ≠ 𝑍 ∧ 𝑍 ≠ 𝑌)) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍) ∧ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
16	14, 15	bitr3i 279	. . . . . . 7 ⊢ (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍) ∧ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
17	12, 16	syl6rbbr 292	. . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)) ↔ (𝑋(lt‘𝐾)𝑍 ∧ 𝑍(lt‘𝐾)𝑌)))
18	17	notbid 320	. . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (¬ ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)) ↔ ¬ (𝑋(lt‘𝐾)𝑍 ∧ 𝑍(lt‘𝐾)𝑌)))
19	5, 18	syl5rbb 286	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (¬ (𝑋(lt‘𝐾)𝑍 ∧ 𝑍(lt‘𝐾)𝑌) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) → (𝑋 = 𝑍 ∨ 𝑍 = 𝑌))))
20	19	3adant3 1128	. . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (¬ (𝑋(lt‘𝐾)𝑍 ∧ 𝑍(lt‘𝐾)𝑌) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) → (𝑋 = 𝑍 ∨ 𝑍 = 𝑌))))
21	4, 20	mpbid 234	. 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) → (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)))
22	1, 6	posref 17555	. . . . . . 7 ⊢ ((𝐾 ∈ Poset ∧ 𝑍 ∈ 𝐵) → 𝑍 ≤ 𝑍)
23	22	3ad2antr3 1186	. . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → 𝑍 ≤ 𝑍)
24	23	3adant3 1128	. . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → 𝑍 ≤ 𝑍)
25		breq1 5062	. . . . 5 ⊢ (𝑋 = 𝑍 → (𝑋 ≤ 𝑍 ↔ 𝑍 ≤ 𝑍))
26	24, 25	syl5ibrcom 249	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑋 = 𝑍 → 𝑋 ≤ 𝑍))
27	1, 6, 3	cvrle 36408	. . . . . . . 8 ⊢ (((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → 𝑋 ≤ 𝑌)
28	27	ex 415	. . . . . . 7 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋𝐶𝑌 → 𝑋 ≤ 𝑌))
29	28	3adant3r3 1180	. . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋𝐶𝑌 → 𝑋 ≤ 𝑌))
30	29	3impia 1113	. . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → 𝑋 ≤ 𝑌)
31		breq2 5063	. . . . 5 ⊢ (𝑍 = 𝑌 → (𝑋 ≤ 𝑍 ↔ 𝑋 ≤ 𝑌))
32	30, 31	syl5ibrcom 249	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑍 = 𝑌 → 𝑋 ≤ 𝑍))
33	26, 32	jaod 855	. . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 = 𝑍 ∨ 𝑍 = 𝑌) → 𝑋 ≤ 𝑍))
34		breq1 5062	. . . . 5 ⊢ (𝑋 = 𝑍 → (𝑋 ≤ 𝑌 ↔ 𝑍 ≤ 𝑌))
35	30, 34	syl5ibcom 247	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑋 = 𝑍 → 𝑍 ≤ 𝑌))
36		breq2 5063	. . . . 5 ⊢ (𝑍 = 𝑌 → (𝑍 ≤ 𝑍 ↔ 𝑍 ≤ 𝑌))
37	24, 36	syl5ibcom 247	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑍 = 𝑌 → 𝑍 ≤ 𝑌))
38	35, 37	jaod 855	. . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 = 𝑍 ∨ 𝑍 = 𝑌) → 𝑍 ≤ 𝑌))
39	33, 38	jcad 515	. 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 = 𝑍 ∨ 𝑍 = 𝑌) → (𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌)))
40	21, 39	impbid 214	1 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ↔ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∨ wo 843   ∧ w3a 1083   = wceq 1533   ∈ wcel 2110   ≠ wne 3016   class class class wbr 5059  ‘cfv 6350  Basecbs 16477  lecple 16566  Posetcpo 17544  ltcplt 17545   ⋖ ccvr 36392

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3497  df-sbc 3773  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-iota 6309  df-fun 6352  df-fv 6358  df-proset 17532  df-poset 17550  df-plt 17562  df-covers 36396

This theorem is referenced by:  cvrcmp  36413  leatb  36422  2llnmat  36654  2lnat  36914