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Theorem ltso 8152
Description: 'Less than' is a strict ordering. (Contributed by NM, 19-Jan-1997.)
Assertion
Ref Expression
ltso  |-  <  Or  RR

Proof of Theorem ltso
Dummy variables  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ltnr 8151 . . . . 5  |-  ( x  e.  RR  ->  -.  x  <  x )
21adantl 277 . . . 4  |-  ( ( T.  /\  x  e.  RR )  ->  -.  x  <  x )
3 lttr 8148 . . . . 5  |-  ( ( x  e.  RR  /\  y  e.  RR  /\  z  e.  RR )  ->  (
( x  <  y  /\  y  <  z )  ->  x  <  z
) )
43adantl 277 . . . 4  |-  ( ( T.  /\  ( x  e.  RR  /\  y  e.  RR  /\  z  e.  RR ) )  -> 
( ( x  < 
y  /\  y  <  z )  ->  x  <  z ) )
52, 4ispod 4352 . . 3  |-  ( T. 
->  <  Po  RR )
65mptru 1382 . 2  |-  <  Po  RR
7 axltwlin 8142 . . 3  |-  ( ( x  e.  RR  /\  y  e.  RR  /\  z  e.  RR )  ->  (
x  <  y  ->  ( x  <  z  \/  z  <  y ) ) )
87rgen3 2593 . 2  |-  A. x  e.  RR  A. y  e.  RR  A. z  e.  RR  ( x  < 
y  ->  ( x  <  z  \/  z  < 
y ) )
9 df-iso 4345 . 2  |-  (  < 
Or  RR  <->  (  <  Po  RR  /\  A. x  e.  RR  A. y  e.  RR  A. z  e.  RR  ( x  < 
y  ->  ( x  <  z  \/  z  < 
y ) ) ) )
106, 8, 9mpbir2an 945 1  |-  <  Or  RR
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    \/ wo 710    /\ w3a 981   T. wtru 1374    e. wcel 2176   A.wral 2484   class class class wbr 4045    Po wpo 4342    Or wor 4343   RRcr 7926    < clt 8109
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-13 2178  ax-14 2179  ax-ext 2187  ax-sep 4163  ax-pow 4219  ax-pr 4254  ax-un 4481  ax-setind 4586  ax-cnex 8018  ax-resscn 8019  ax-pre-ltirr 8039  ax-pre-ltwlin 8040  ax-pre-lttrn 8041
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1484  df-sb 1786  df-eu 2057  df-mo 2058  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-ne 2377  df-nel 2472  df-ral 2489  df-rex 2490  df-rab 2493  df-v 2774  df-dif 3168  df-un 3170  df-in 3172  df-ss 3179  df-pw 3618  df-sn 3639  df-pr 3640  df-op 3642  df-uni 3851  df-br 4046  df-opab 4107  df-po 4344  df-iso 4345  df-xp 4682  df-pnf 8111  df-mnf 8112  df-ltxr 8114
This theorem is referenced by:  gtso  8153  ltnsym2  8165  suprlubex  9027  fimaxq  10974
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