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Theorem pltnlt 16226
Description: The less-than relation implies the negation of its inverse. (Contributed by NM, 18-Oct-2011.)
Hypotheses
Ref Expression
pltnlt.b  |-  B  =  ( Base `  K
)
pltnlt.s  |-  .<  =  ( lt `  K )
Assertion
Ref Expression
pltnlt  |-  ( ( ( K  e.  Poset  /\  X  e.  B  /\  Y  e.  B )  /\  X  .<  Y )  ->  -.  Y  .<  X )

Proof of Theorem pltnlt
StepHypRef Expression
1 pltnlt.b . . 3  |-  B  =  ( Base `  K
)
2 eqid 2453 . . 3  |-  ( le
`  K )  =  ( le `  K
)
3 pltnlt.s . . 3  |-  .<  =  ( lt `  K )
41, 2, 3pltnle 16224 . 2  |-  ( ( ( K  e.  Poset  /\  X  e.  B  /\  Y  e.  B )  /\  X  .<  Y )  ->  -.  Y ( le `  K ) X )
52, 3pltle 16219 . . . 4  |-  ( ( K  e.  Poset  /\  Y  e.  B  /\  X  e.  B )  ->  ( Y  .<  X  ->  Y
( le `  K
) X ) )
653com23 1215 . . 3  |-  ( ( K  e.  Poset  /\  X  e.  B  /\  Y  e.  B )  ->  ( Y  .<  X  ->  Y
( le `  K
) X ) )
76adantr 467 . 2  |-  ( ( ( K  e.  Poset  /\  X  e.  B  /\  Y  e.  B )  /\  X  .<  Y )  ->  ( Y  .<  X  ->  Y ( le
`  K ) X ) )
84, 7mtod 181 1  |-  ( ( ( K  e.  Poset  /\  X  e.  B  /\  Y  e.  B )  /\  X  .<  Y )  ->  -.  Y  .<  X )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 371    /\ w3a 986    = wceq 1446    e. wcel 1889   class class class wbr 4405   ` cfv 5585   Basecbs 15133   lecple 15209   Posetcpo 16197   ltcplt 16198
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1671  ax-4 1684  ax-5 1760  ax-6 1807  ax-7 1853  ax-9 1898  ax-10 1917  ax-11 1922  ax-12 1935  ax-13 2093  ax-ext 2433  ax-sep 4528  ax-nul 4537  ax-pr 4642
This theorem depends on definitions:  df-bi 189  df-or 372  df-an 373  df-3an 988  df-tru 1449  df-ex 1666  df-nf 1670  df-sb 1800  df-eu 2305  df-mo 2306  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2583  df-ne 2626  df-ral 2744  df-rex 2745  df-rab 2748  df-v 3049  df-sbc 3270  df-dif 3409  df-un 3411  df-in 3413  df-ss 3420  df-nul 3734  df-if 3884  df-sn 3971  df-pr 3973  df-op 3977  df-uni 4202  df-br 4406  df-opab 4465  df-mpt 4466  df-id 4752  df-xp 4843  df-rel 4844  df-cnv 4845  df-co 4846  df-dm 4847  df-iota 5549  df-fun 5587  df-fv 5593  df-preset 16185  df-poset 16203  df-plt 16216
This theorem is referenced by: (None)
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