lcvnbtwn3 - Mathbox for Norm Megill

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Theorem lcvnbtwn3 38392

Description: The covers relation implies no in-betweenness. (cvnbtwn3 32013 analog.) (Contributed by NM, 7-Jan-2015.)

**Hypotheses**
Ref	Expression
lcvnbtwn.s	⊢ 𝑆 = (LSubSp‘𝑊)
lcvnbtwn.c	⊢ 𝐶 = ( ⋖_L ‘𝑊)
lcvnbtwn.w	⊢ (𝜑 → 𝑊 ∈ 𝑋)
lcvnbtwn.r	⊢ (𝜑 → 𝑅 ∈ 𝑆)
lcvnbtwn.t	⊢ (𝜑 → 𝑇 ∈ 𝑆)
lcvnbtwn.u	⊢ (𝜑 → 𝑈 ∈ 𝑆)
lcvnbtwn.d	⊢ (𝜑 → 𝑅𝐶𝑇)
lcvnbtwn3.p	⊢ (𝜑 → 𝑅 ⊆ 𝑈)
lcvnbtwn3.q	⊢ (𝜑 → 𝑈 ⊊ 𝑇)

**Assertion**
Ref	Expression
lcvnbtwn3	⊢ (𝜑 → 𝑈 = 𝑅)

**Proof of Theorem lcvnbtwn3**
Step	Hyp	Ref	Expression
1		lcvnbtwn3.p	. 2 ⊢ (𝜑 → 𝑅 ⊆ 𝑈)
2		lcvnbtwn3.q	. 2 ⊢ (𝜑 → 𝑈 ⊊ 𝑇)
3		lcvnbtwn.s	. . . 4 ⊢ 𝑆 = (LSubSp‘𝑊)
4		lcvnbtwn.c	. . . 4 ⊢ 𝐶 = ( ⋖_L ‘𝑊)
5		lcvnbtwn.w	. . . 4 ⊢ (𝜑 → 𝑊 ∈ 𝑋)
6		lcvnbtwn.r	. . . 4 ⊢ (𝜑 → 𝑅 ∈ 𝑆)
7		lcvnbtwn.t	. . . 4 ⊢ (𝜑 → 𝑇 ∈ 𝑆)
8		lcvnbtwn.u	. . . 4 ⊢ (𝜑 → 𝑈 ∈ 𝑆)
9		lcvnbtwn.d	. . . 4 ⊢ (𝜑 → 𝑅𝐶𝑇)
10	3, 4, 5, 6, 7, 8, 9	lcvnbtwn 38389	. . 3 ⊢ (𝜑 → ¬ (𝑅 ⊊ 𝑈 ∧ 𝑈 ⊊ 𝑇))
11		iman 401	. . . 4 ⊢ (((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) → 𝑅 = 𝑈) ↔ ¬ ((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) ∧ ¬ 𝑅 = 𝑈))
12		eqcom 2731	. . . . 5 ⊢ (𝑈 = 𝑅 ↔ 𝑅 = 𝑈)
13	12	imbi2i 336	. . . 4 ⊢ (((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) → 𝑈 = 𝑅) ↔ ((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) → 𝑅 = 𝑈))
14		dfpss2 4078	. . . . . . 7 ⊢ (𝑅 ⊊ 𝑈 ↔ (𝑅 ⊆ 𝑈 ∧ ¬ 𝑅 = 𝑈))
15	14	anbi1i 623	. . . . . 6 ⊢ ((𝑅 ⊊ 𝑈 ∧ 𝑈 ⊊ 𝑇) ↔ ((𝑅 ⊆ 𝑈 ∧ ¬ 𝑅 = 𝑈) ∧ 𝑈 ⊊ 𝑇))
16		an32 643	. . . . . 6 ⊢ (((𝑅 ⊆ 𝑈 ∧ ¬ 𝑅 = 𝑈) ∧ 𝑈 ⊊ 𝑇) ↔ ((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) ∧ ¬ 𝑅 = 𝑈))
17	15, 16	bitri 275	. . . . 5 ⊢ ((𝑅 ⊊ 𝑈 ∧ 𝑈 ⊊ 𝑇) ↔ ((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) ∧ ¬ 𝑅 = 𝑈))
18	17	notbii 320	. . . 4 ⊢ (¬ (𝑅 ⊊ 𝑈 ∧ 𝑈 ⊊ 𝑇) ↔ ¬ ((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) ∧ ¬ 𝑅 = 𝑈))
19	11, 13, 18	3bitr4ri 304	. . 3 ⊢ (¬ (𝑅 ⊊ 𝑈 ∧ 𝑈 ⊊ 𝑇) ↔ ((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) → 𝑈 = 𝑅))
20	10, 19	sylib 217	. 2 ⊢ (𝜑 → ((𝑅 ⊆ 𝑈 ∧ 𝑈 ⊊ 𝑇) → 𝑈 = 𝑅))
21	1, 2, 20	mp2and 696	1 ⊢ (𝜑 → 𝑈 = 𝑅)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1533 ∈ wcel 2098 ⊆ wss 3941 ⊊ wpss 3942 class class class wbr 5139 ‘cfv 6534 LSubSpclss 20770 ⋖_L clcv 38382

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2695 ax-sep 5290 ax-nul 5297 ax-pow 5354 ax-pr 5418 ax-un 7719

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-ral 3054 df-rex 3063 df-rab 3425 df-v 3468 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3960 df-nul 4316 df-if 4522 df-pw 4597 df-sn 4622 df-pr 4624 df-op 4628 df-uni 4901 df-br 5140 df-opab 5202 df-mpt 5223 df-id 5565 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-iota 6486 df-fun 6536 df-fv 6542 df-lcv 38383

This theorem is referenced by: lsatcveq0 38396 lsatcvatlem 38413

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