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Theorem lenlti 10157
Description: 'Less than or equal to' in terms of 'less than'. (Contributed by NM, 24-May-1999.)
Hypotheses
Ref Expression
lt.1  |-  A  e.  RR
lt.2  |-  B  e.  RR
Assertion
Ref Expression
lenlti  |-  ( A  <_  B  <->  -.  B  <  A )

Proof of Theorem lenlti
StepHypRef Expression
1 lt.1 . 2  |-  A  e.  RR
2 lt.2 . 2  |-  B  e.  RR
3 lenlt 10116 . 2  |-  ( ( A  e.  RR  /\  B  e.  RR )  ->  ( A  <_  B  <->  -.  B  <  A ) )
41, 2, 3mp2an 708 1  |-  ( A  <_  B  <->  -.  B  <  A )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    <-> wb 196    e. wcel 1990   class class class wbr 4653   RRcr 9935    < clt 10074    <_ cle 10075
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-xp 5120  df-cnv 5122  df-xr 10078  df-le 10080
This theorem is referenced by:  ltnlei  10158  hashgt12el  13210  hashgt12el2  13211  georeclim  14603  geoisumr  14609  divalglem6  15121  umgrislfupgrlem  26017  ballotlem4  30560  signswch  30638
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