Theorem cvrnbtwn4 34566

Description: The covers relation implies no in-betweenness. Part of proof of Lemma 7.5.1 of [MaedaMaeda] p. 31. (cvnbtwn4 29148 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 2622	. . . 4 ⊢ (lt‘𝐾) = (lt‘𝐾)
3		cvrle.c	. . . 4 ⊢ 𝐶 = ( ⋖ ‘𝐾)
4	1, 2, 3	cvrnbtwn 34558	. . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ¬ (𝑋(lt‘𝐾)𝑍 ∧ 𝑍(lt‘𝐾)𝑌))
5		iman 440	. . . . 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 16960	. . . . . . . . 9 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋(lt‘𝐾)𝑍 ↔ (𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍)))
8	7	3adant3r2 1275	. . . . . . . 8 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋(lt‘𝐾)𝑍 ↔ (𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍)))
9	6, 2	pltval 16960	. . . . . . . . . 10 ⊢ ((𝐾 ∈ Poset ∧ 𝑍 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑍(lt‘𝐾)𝑌 ↔ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
10	9	3com23 1271	. . . . . . . . 9 ⊢ ((𝐾 ∈ Poset ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑍(lt‘𝐾)𝑌 ↔ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
11	10	3adant3r1 1274	. . . . . . . 8 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑍(lt‘𝐾)𝑌 ↔ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
12	8, 11	anbi12d 747	. . . . . . 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 2886	. . . . . . . . 9 ⊢ ((𝑋 ≠ 𝑍 ∧ 𝑍 ≠ 𝑌) ↔ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌))
14	13	anbi2i 730	. . . . . . . 8 ⊢ (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ (𝑋 ≠ 𝑍 ∧ 𝑍 ≠ 𝑌)) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)))
15		an4 865	. . . . . . . 8 ⊢ (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ (𝑋 ≠ 𝑍 ∧ 𝑍 ≠ 𝑌)) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍) ∧ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
16	14, 15	bitr3i 266	. . . . . . 7 ⊢ (((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) ∧ ¬ (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)) ↔ ((𝑋 ≤ 𝑍 ∧ 𝑋 ≠ 𝑍) ∧ (𝑍 ≤ 𝑌 ∧ 𝑍 ≠ 𝑌)))
17	12, 16	syl6rbbr 279	. . . . . 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 308	. . . . 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 273	. . . 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 1081	. . 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 222	. 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌) → (𝑋 = 𝑍 ∨ 𝑍 = 𝑌)))
22	1, 6	posref 16951	. . . . . . 7 ⊢ ((𝐾 ∈ Poset ∧ 𝑍 ∈ 𝐵) → 𝑍 ≤ 𝑍)
23	22	3ad2antr3 1228	. . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → 𝑍 ≤ 𝑍)
24	23	3adant3 1081	. . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → 𝑍 ≤ 𝑍)
25		breq1 4656	. . . . 5 ⊢ (𝑋 = 𝑍 → (𝑋 ≤ 𝑍 ↔ 𝑍 ≤ 𝑍))
26	24, 25	syl5ibrcom 237	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑋 = 𝑍 → 𝑋 ≤ 𝑍))
27	1, 6, 3	cvrle 34565	. . . . . . . 8 ⊢ (((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → 𝑋 ≤ 𝑌)
28	27	ex 450	. . . . . . 7 ⊢ ((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋𝐶𝑌 → 𝑋 ≤ 𝑌))
29	28	3adant3r3 1276	. . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋𝐶𝑌 → 𝑋 ≤ 𝑌))
30	29	3impia 1261	. . . . 5 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → 𝑋 ≤ 𝑌)
31		breq2 4657	. . . . 5 ⊢ (𝑍 = 𝑌 → (𝑋 ≤ 𝑍 ↔ 𝑋 ≤ 𝑌))
32	30, 31	syl5ibrcom 237	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑍 = 𝑌 → 𝑋 ≤ 𝑍))
33	26, 32	jaod 395	. . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 = 𝑍 ∨ 𝑍 = 𝑌) → 𝑋 ≤ 𝑍))
34		breq1 4656	. . . . 5 ⊢ (𝑋 = 𝑍 → (𝑋 ≤ 𝑌 ↔ 𝑍 ≤ 𝑌))
35	30, 34	syl5ibcom 235	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑋 = 𝑍 → 𝑍 ≤ 𝑌))
36		breq2 4657	. . . . 5 ⊢ (𝑍 = 𝑌 → (𝑍 ≤ 𝑍 ↔ 𝑍 ≤ 𝑌))
37	24, 36	syl5ibcom 235	. . . 4 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → (𝑍 = 𝑌 → 𝑍 ≤ 𝑌))
38	35, 37	jaod 395	. . 3 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 = 𝑍 ∨ 𝑍 = 𝑌) → 𝑍 ≤ 𝑌))
39	33, 38	jcad 555	. 2 ⊢ ((𝐾 ∈ Poset ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ((𝑋 = 𝑍 ∨ 𝑍 = 𝑌) → (𝑋 ≤ 𝑍 ∧ 𝑍 ≤ 𝑌)))
40	21, 39	impbid 202	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 196   ∨ wo 383   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990   ≠ wne 2794   class class class wbr 4653  ‘cfv 5888  Basecbs 15857  lecple 15948  Posetcpo 16940  ltcplt 16941   ⋖ ccvr 34549

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-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-iota 5851  df-fun 5890  df-fv 5896  df-preset 16928  df-poset 16946  df-plt 16958  df-covers 34553

This theorem is referenced by:  cvrcmp  34570  leatb  34579  2llnmat  34810  2lnat  35070