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Theorem cvrnrefN 39945
Description: The covers relation is not reflexive. (cvnref 32583 analog.) (Contributed by NM, 1-Nov-2012.) (New usage is discouraged.)
Hypotheses
Ref Expression
cvrne.b 𝐵 = (Base‘𝐾)
cvrne.c 𝐶 = ( ⋖ ‘𝐾)
Assertion
Ref Expression
cvrnrefN ((𝐾𝐴𝑋𝐵) → ¬ 𝑋𝐶𝑋)

Proof of Theorem cvrnrefN
StepHypRef Expression
1 eqid 2769 . 2 𝑋 = 𝑋
2 simpll 778 . . . . 5 (((𝐾𝐴𝑋𝐵) ∧ 𝑋𝐶𝑋) → 𝐾𝐴)
3 simplr 780 . . . . 5 (((𝐾𝐴𝑋𝐵) ∧ 𝑋𝐶𝑋) → 𝑋𝐵)
4 simpr 489 . . . . 5 (((𝐾𝐴𝑋𝐵) ∧ 𝑋𝐶𝑋) → 𝑋𝐶𝑋)
5 cvrne.b . . . . . 6 𝐵 = (Base‘𝐾)
6 cvrne.c . . . . . 6 𝐶 = ( ⋖ ‘𝐾)
75, 6cvrne 39944 . . . . 5 (((𝐾𝐴𝑋𝐵𝑋𝐵) ∧ 𝑋𝐶𝑋) → 𝑋𝑋)
82, 3, 3, 4, 7syl31anc 1398 . . . 4 (((𝐾𝐴𝑋𝐵) ∧ 𝑋𝐶𝑋) → 𝑋𝑋)
98ex 417 . . 3 ((𝐾𝐴𝑋𝐵) → (𝑋𝐶𝑋𝑋𝑋))
109necon2bd 2980 . 2 ((𝐾𝐴𝑋𝐵) → (𝑋 = 𝑋 → ¬ 𝑋𝐶𝑋))
111, 10mpi 21 1 ((𝐾𝐴𝑋𝐵) → ¬ 𝑋𝐶𝑋)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 400   = wceq 1567  wcel 2149  wne 2964   class class class wbr 5113  cfv 6537  Basecbs 17268  ccvr 39925
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5261  ax-nul 5271  ax-pow 5337  ax-pr 5405  ax-un 7733
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-br 5114  df-opab 5178  df-mpt 5197  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-iota 6493  df-fun 6539  df-fv 6545  df-plt 18383  df-covers 39929
This theorem is referenced by: (None)
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