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Theorem ltso 8104
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 8103 . . . . 5  |-  ( x  e.  RR  ->  -.  x  <  x )
21adantl 277 . . . 4  |-  ( ( T.  /\  x  e.  RR )  ->  -.  x  <  x )
3 lttr 8100 . . . . 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 4339 . . 3  |-  ( T. 
->  <  Po  RR )
65mptru 1373 . 2  |-  <  Po  RR
7 axltwlin 8094 . . 3  |-  ( ( x  e.  RR  /\  y  e.  RR  /\  z  e.  RR )  ->  (
x  <  y  ->  ( x  <  z  \/  z  <  y ) ) )
87rgen3 2584 . 2  |-  A. x  e.  RR  A. y  e.  RR  A. z  e.  RR  ( x  < 
y  ->  ( x  <  z  \/  z  < 
y ) )
9 df-iso 4332 . 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 944 1  |-  <  Or  RR
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    \/ wo 709    /\ w3a 980   T. wtru 1365    e. wcel 2167   A.wral 2475   class class class wbr 4033    Po wpo 4329    Or wor 4330   RRcr 7878    < clt 8061
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 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-cnex 7970  ax-resscn 7971  ax-pre-ltirr 7991  ax-pre-ltwlin 7992  ax-pre-lttrn 7993
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-rab 2484  df-v 2765  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-br 4034  df-opab 4095  df-po 4331  df-iso 4332  df-xp 4669  df-pnf 8063  df-mnf 8064  df-ltxr 8066
This theorem is referenced by:  gtso  8105  ltnsym2  8117  suprlubex  8979  fimaxq  10919
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