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Theorem ltso 8031
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 8030 . . . . 5  |-  ( x  e.  RR  ->  -.  x  <  x )
21adantl 277 . . . 4  |-  ( ( T.  /\  x  e.  RR )  ->  -.  x  <  x )
3 lttr 8027 . . . . 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 4303 . . 3  |-  ( T. 
->  <  Po  RR )
65mptru 1362 . 2  |-  <  Po  RR
7 axltwlin 8021 . . 3  |-  ( ( x  e.  RR  /\  y  e.  RR  /\  z  e.  RR )  ->  (
x  <  y  ->  ( x  <  z  \/  z  <  y ) ) )
87rgen3 2564 . 2  |-  A. x  e.  RR  A. y  e.  RR  A. z  e.  RR  ( x  < 
y  ->  ( x  <  z  \/  z  < 
y ) )
9 df-iso 4296 . 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 942 1  |-  <  Or  RR
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    \/ wo 708    /\ w3a 978   T. wtru 1354    e. wcel 2148   A.wral 2455   class class class wbr 4002    Po wpo 4293    Or wor 4294   RRcr 7807    < clt 7988
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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-sep 4120  ax-pow 4173  ax-pr 4208  ax-un 4432  ax-setind 4535  ax-cnex 7899  ax-resscn 7900  ax-pre-ltirr 7920  ax-pre-ltwlin 7921  ax-pre-lttrn 7922
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-nel 2443  df-ral 2460  df-rex 2461  df-rab 2464  df-v 2739  df-dif 3131  df-un 3133  df-in 3135  df-ss 3142  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-br 4003  df-opab 4064  df-po 4295  df-iso 4296  df-xp 4631  df-pnf 7990  df-mnf 7991  df-ltxr 7993
This theorem is referenced by:  gtso  8032  ltnsym2  8044  suprlubex  8905  fimaxq  10800
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