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Theorem lcvnbtwn 35046
Description: The covers relation implies no in-betweenness. (cvnbtwn 29670 analog.) (Contributed by NM, 7-Jan-2015.)
Hypotheses
Ref Expression
lcvnbtwn.s 𝑆 = (LSubSp‘𝑊)
lcvnbtwn.c 𝐶 = ( ⋖L𝑊)
lcvnbtwn.w (𝜑𝑊𝑋)
lcvnbtwn.r (𝜑𝑅𝑆)
lcvnbtwn.t (𝜑𝑇𝑆)
lcvnbtwn.u (𝜑𝑈𝑆)
lcvnbtwn.d (𝜑𝑅𝐶𝑇)
Assertion
Ref Expression
lcvnbtwn (𝜑 → ¬ (𝑅𝑈𝑈𝑇))

Proof of Theorem lcvnbtwn
Dummy variable 𝑢 is distinct from all other variables.
StepHypRef Expression
1 lcvnbtwn.d . . . 4 (𝜑𝑅𝐶𝑇)
2 lcvnbtwn.s . . . . 5 𝑆 = (LSubSp‘𝑊)
3 lcvnbtwn.c . . . . 5 𝐶 = ( ⋖L𝑊)
4 lcvnbtwn.w . . . . 5 (𝜑𝑊𝑋)
5 lcvnbtwn.r . . . . 5 (𝜑𝑅𝑆)
6 lcvnbtwn.t . . . . 5 (𝜑𝑇𝑆)
72, 3, 4, 5, 6lcvbr 35042 . . . 4 (𝜑 → (𝑅𝐶𝑇 ↔ (𝑅𝑇 ∧ ¬ ∃𝑢𝑆 (𝑅𝑢𝑢𝑇))))
81, 7mpbid 224 . . 3 (𝜑 → (𝑅𝑇 ∧ ¬ ∃𝑢𝑆 (𝑅𝑢𝑢𝑇)))
98simprd 490 . 2 (𝜑 → ¬ ∃𝑢𝑆 (𝑅𝑢𝑢𝑇))
10 lcvnbtwn.u . . 3 (𝜑𝑈𝑆)
11 psseq2 3892 . . . . 5 (𝑢 = 𝑈 → (𝑅𝑢𝑅𝑈))
12 psseq1 3891 . . . . 5 (𝑢 = 𝑈 → (𝑢𝑇𝑈𝑇))
1311, 12anbi12d 625 . . . 4 (𝑢 = 𝑈 → ((𝑅𝑢𝑢𝑇) ↔ (𝑅𝑈𝑈𝑇)))
1413rspcev 3497 . . 3 ((𝑈𝑆 ∧ (𝑅𝑈𝑈𝑇)) → ∃𝑢𝑆 (𝑅𝑢𝑢𝑇))
1510, 14sylan 576 . 2 ((𝜑 ∧ (𝑅𝑈𝑈𝑇)) → ∃𝑢𝑆 (𝑅𝑢𝑢𝑇))
169, 15mtand 851 1 (𝜑 → ¬ (𝑅𝑈𝑈𝑇))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 385   = wceq 1653  wcel 2157  wrex 3090  wpss 3770   class class class wbr 4843  cfv 6101  LSubSpclss 19250  L clcv 35039
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-8 2159  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2377  ax-ext 2777  ax-sep 4975  ax-nul 4983  ax-pow 5035  ax-pr 5097  ax-un 7183
This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2591  df-eu 2609  df-clab 2786  df-cleq 2792  df-clel 2795  df-nfc 2930  df-ne 2972  df-ral 3094  df-rex 3095  df-rab 3098  df-v 3387  df-sbc 3634  df-dif 3772  df-un 3774  df-in 3776  df-ss 3783  df-pss 3785  df-nul 4116  df-if 4278  df-pw 4351  df-sn 4369  df-pr 4371  df-op 4375  df-uni 4629  df-br 4844  df-opab 4906  df-mpt 4923  df-id 5220  df-xp 5318  df-rel 5319  df-cnv 5320  df-co 5321  df-dm 5322  df-iota 6064  df-fun 6103  df-fv 6109  df-lcv 35040
This theorem is referenced by:  lcvntr  35047  lcvnbtwn2  35048  lcvnbtwn3  35049
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