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Theorem cvrnbtwn 37212
Description: There is no element between the two arguments of the covers relation. (cvnbtwn 30549 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 ((𝐾𝐴 ∧ (𝑋𝐵𝑌𝐵𝑍𝐵) ∧ 𝑋𝐶𝑌) → ¬ (𝑋 < 𝑍𝑍 < 𝑌))

Proof of Theorem cvrnbtwn
Dummy variable 𝑧 is distinct from all other variables.
StepHypRef Expression
1 cvrfval.b . . . . 5 𝐵 = (Base‘𝐾)
2 cvrfval.s . . . . 5 < = (lt‘𝐾)
3 cvrfval.c . . . . 5 𝐶 = ( ⋖ ‘𝐾)
41, 2, 3cvrval 37210 . . . 4 ((𝐾𝐴𝑋𝐵𝑌𝐵) → (𝑋𝐶𝑌 ↔ (𝑋 < 𝑌 ∧ ¬ ∃𝑧𝐵 (𝑋 < 𝑧𝑧 < 𝑌))))
543adant3r3 1182 . . 3 ((𝐾𝐴 ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋𝐶𝑌 ↔ (𝑋 < 𝑌 ∧ ¬ ∃𝑧𝐵 (𝑋 < 𝑧𝑧 < 𝑌))))
6 ralnex 3163 . . . . . . 7 (∀𝑧𝐵 ¬ (𝑋 < 𝑧𝑧 < 𝑌) ↔ ¬ ∃𝑧𝐵 (𝑋 < 𝑧𝑧 < 𝑌))
7 breq2 5074 . . . . . . . . . 10 (𝑧 = 𝑍 → (𝑋 < 𝑧𝑋 < 𝑍))
8 breq1 5073 . . . . . . . . . 10 (𝑧 = 𝑍 → (𝑧 < 𝑌𝑍 < 𝑌))
97, 8anbi12d 630 . . . . . . . . 9 (𝑧 = 𝑍 → ((𝑋 < 𝑧𝑧 < 𝑌) ↔ (𝑋 < 𝑍𝑍 < 𝑌)))
109notbid 317 . . . . . . . 8 (𝑧 = 𝑍 → (¬ (𝑋 < 𝑧𝑧 < 𝑌) ↔ ¬ (𝑋 < 𝑍𝑍 < 𝑌)))
1110rspcv 3547 . . . . . . 7 (𝑍𝐵 → (∀𝑧𝐵 ¬ (𝑋 < 𝑧𝑧 < 𝑌) → ¬ (𝑋 < 𝑍𝑍 < 𝑌)))
126, 11syl5bir 242 . . . . . 6 (𝑍𝐵 → (¬ ∃𝑧𝐵 (𝑋 < 𝑧𝑧 < 𝑌) → ¬ (𝑋 < 𝑍𝑍 < 𝑌)))
1312adantld 490 . . . . 5 (𝑍𝐵 → ((𝑋 < 𝑌 ∧ ¬ ∃𝑧𝐵 (𝑋 < 𝑧𝑧 < 𝑌)) → ¬ (𝑋 < 𝑍𝑍 < 𝑌)))
14133ad2ant3 1133 . . . 4 ((𝑋𝐵𝑌𝐵𝑍𝐵) → ((𝑋 < 𝑌 ∧ ¬ ∃𝑧𝐵 (𝑋 < 𝑧𝑧 < 𝑌)) → ¬ (𝑋 < 𝑍𝑍 < 𝑌)))
1514adantl 481 . . 3 ((𝐾𝐴 ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 < 𝑌 ∧ ¬ ∃𝑧𝐵 (𝑋 < 𝑧𝑧 < 𝑌)) → ¬ (𝑋 < 𝑍𝑍 < 𝑌)))
165, 15sylbid 239 . 2 ((𝐾𝐴 ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋𝐶𝑌 → ¬ (𝑋 < 𝑍𝑍 < 𝑌)))
17163impia 1115 1 ((𝐾𝐴 ∧ (𝑋𝐵𝑌𝐵𝑍𝐵) ∧ 𝑋𝐶𝑌) → ¬ (𝑋 < 𝑍𝑍 < 𝑌))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 205  wa 395  w3a 1085   = wceq 1539  wcel 2108  wral 3063  wrex 3064   class class class wbr 5070  cfv 6418  Basecbs 16840  ltcplt 17941  ccvr 37203
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ral 3068  df-rex 3069  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-iota 6376  df-fun 6420  df-fv 6426  df-covers 37207
This theorem is referenced by:  cvrnbtwn2  37216  cvrnbtwn3  37217  cvrnbtwn4  37220  ltltncvr  37364
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