Theorem cvrnbtwn 36422

Description: There is no element between the two arguments of the covers relation. (cvnbtwn 30063 analog.) (Contributed by NM, 18-Oct-2011.)

Hypotheses

Ref	Expression
cvrfval.b	⊢ 𝐵 = (Base‘𝐾)
cvrfval.s	⊢ < = (lt‘𝐾)
cvrfval.c	⊢ 𝐶 = ( ⋖ ‘𝐾)

Assertion

Ref	Expression
cvrnbtwn	⊢ ((𝐾 ∈ 𝐴 ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌))

Proof of Theorem cvrnbtwn

Dummy variable 𝑧 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		cvrfval.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐾)
2		cvrfval.s	. . . . 5 ⊢ < = (lt‘𝐾)
3		cvrfval.c	. . . . 5 ⊢ 𝐶 = ( ⋖ ‘𝐾)
4	1, 2, 3	cvrval 36420	. . . 4 ⊢ ((𝐾 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋𝐶𝑌 ↔ (𝑋 < 𝑌 ∧ ¬ ∃𝑧 ∈ 𝐵 (𝑋 < 𝑧 ∧ 𝑧 < 𝑌))))
5	4	3adant3r3 1180	. . 3 ⊢ ((𝐾 ∈ 𝐴 ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋𝐶𝑌 ↔ (𝑋 < 𝑌 ∧ ¬ ∃𝑧 ∈ 𝐵 (𝑋 < 𝑧 ∧ 𝑧 < 𝑌))))
6		ralnex 3236	. . . . . . 7 ⊢ (∀𝑧 ∈ 𝐵 ¬ (𝑋 < 𝑧 ∧ 𝑧 < 𝑌) ↔ ¬ ∃𝑧 ∈ 𝐵 (𝑋 < 𝑧 ∧ 𝑧 < 𝑌))
7		breq2 5070	. . . . . . . . . 10 ⊢ (𝑧 = 𝑍 → (𝑋 < 𝑧 ↔ 𝑋 < 𝑍))
8		breq1 5069	. . . . . . . . . 10 ⊢ (𝑧 = 𝑍 → (𝑧 < 𝑌 ↔ 𝑍 < 𝑌))
9	7, 8	anbi12d 632	. . . . . . . . 9 ⊢ (𝑧 = 𝑍 → ((𝑋 < 𝑧 ∧ 𝑧 < 𝑌) ↔ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
10	9	notbid 320	. . . . . . . 8 ⊢ (𝑧 = 𝑍 → (¬ (𝑋 < 𝑧 ∧ 𝑧 < 𝑌) ↔ ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
11	10	rspcv 3618	. . . . . . 7 ⊢ (𝑍 ∈ 𝐵 → (∀𝑧 ∈ 𝐵 ¬ (𝑋 < 𝑧 ∧ 𝑧 < 𝑌) → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
12	6, 11	syl5bir 245	. . . . . 6 ⊢ (𝑍 ∈ 𝐵 → (¬ ∃𝑧 ∈ 𝐵 (𝑋 < 𝑧 ∧ 𝑧 < 𝑌) → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
13	12	adantld 493	. . . . 5 ⊢ (𝑍 ∈ 𝐵 → ((𝑋 < 𝑌 ∧ ¬ ∃𝑧 ∈ 𝐵 (𝑋 < 𝑧 ∧ 𝑧 < 𝑌)) → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
14	13	3ad2ant3 1131	. . . 4 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → ((𝑋 < 𝑌 ∧ ¬ ∃𝑧 ∈ 𝐵 (𝑋 < 𝑧 ∧ 𝑧 < 𝑌)) → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
15	14	adantl 484	. . 3 ⊢ ((𝐾 ∈ 𝐴 ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 < 𝑌 ∧ ¬ ∃𝑧 ∈ 𝐵 (𝑋 < 𝑧 ∧ 𝑧 < 𝑌)) → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
16	5, 15	sylbid 242	. 2 ⊢ ((𝐾 ∈ 𝐴 ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋𝐶𝑌 → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌)))
17	16	3impia 1113	1 ⊢ ((𝐾 ∈ 𝐴 ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) ∧ 𝑋𝐶𝑌) → ¬ (𝑋 < 𝑍 ∧ 𝑍 < 𝑌))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1083   = wceq 1537   ∈ wcel 2114  ∀wral 3138  ∃wrex 3139   class class class wbr 5066  ‘cfv 6355  Basecbs 16483  ltcplt 17551   ⋖ ccvr 36413

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5203  ax-nul 5210  ax-pow 5266  ax-pr 5330  ax-un 7461

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  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 4568  df-pr 4570  df-op 4574  df-uni 4839  df-br 5067  df-opab 5129  df-mpt 5147  df-id 5460  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-iota 6314  df-fun 6357  df-fv 6363  df-covers 36417

This theorem is referenced by:  cvrnbtwn2  36426  cvrnbtwn3  36427  cvrnbtwn4  36430  ltltncvr  36574