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Theorem cvrnrefN 30017
Description: The covers relation is not reflexive. (cvnref 23786 analog.) (Contributed by NM, 1-Nov-2012.) (New usage is discouraged.)
Hypotheses
Ref Expression
cvrne.b  |-  B  =  ( Base `  K
)
cvrne.c  |-  C  =  (  <o  `  K )
Assertion
Ref Expression
cvrnrefN  |-  ( ( K  e.  A  /\  X  e.  B )  ->  -.  X C X )

Proof of Theorem cvrnrefN
StepHypRef Expression
1 eqid 2435 . 2  |-  X  =  X
2 simpll 731 . . . . 5  |-  ( ( ( K  e.  A  /\  X  e.  B
)  /\  X C X )  ->  K  e.  A )
3 simplr 732 . . . . 5  |-  ( ( ( K  e.  A  /\  X  e.  B
)  /\  X C X )  ->  X  e.  B )
4 simpr 448 . . . . 5  |-  ( ( ( K  e.  A  /\  X  e.  B
)  /\  X C X )  ->  X C X )
5 cvrne.b . . . . . 6  |-  B  =  ( Base `  K
)
6 cvrne.c . . . . . 6  |-  C  =  (  <o  `  K )
75, 6cvrne 30016 . . . . 5  |-  ( ( ( K  e.  A  /\  X  e.  B  /\  X  e.  B
)  /\  X C X )  ->  X  =/=  X )
82, 3, 3, 4, 7syl31anc 1187 . . . 4  |-  ( ( ( K  e.  A  /\  X  e.  B
)  /\  X C X )  ->  X  =/=  X )
98ex 424 . . 3  |-  ( ( K  e.  A  /\  X  e.  B )  ->  ( X C X  ->  X  =/=  X
) )
109necon2bd 2647 . 2  |-  ( ( K  e.  A  /\  X  e.  B )  ->  ( X  =  X  ->  -.  X C X ) )
111, 10mpi 17 1  |-  ( ( K  e.  A  /\  X  e.  B )  ->  -.  X C X )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 359    = wceq 1652    e. wcel 1725    =/= wne 2598   class class class wbr 4204   ` cfv 5446   Basecbs 13461    <o ccvr 29997
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-13 1727  ax-14 1729  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2416  ax-sep 4322  ax-nul 4330  ax-pow 4369  ax-pr 4395  ax-un 4693
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-eu 2284  df-mo 2285  df-clab 2422  df-cleq 2428  df-clel 2431  df-nfc 2560  df-ne 2600  df-ral 2702  df-rex 2703  df-rab 2706  df-v 2950  df-sbc 3154  df-dif 3315  df-un 3317  df-in 3319  df-ss 3326  df-nul 3621  df-if 3732  df-pw 3793  df-sn 3812  df-pr 3813  df-op 3815  df-uni 4008  df-br 4205  df-opab 4259  df-mpt 4260  df-id 4490  df-xp 4876  df-rel 4877  df-cnv 4878  df-co 4879  df-dm 4880  df-iota 5410  df-fun 5448  df-fv 5454  df-plt 14407  df-covers 30001
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