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Theorem ltnlei 10761
Description: 'Less than' in terms of 'less than or equal to'. (Contributed by NM, 11-Jul-2005.)
Hypotheses
Ref Expression
lt.1 𝐴 ∈ ℝ
lt.2 𝐵 ∈ ℝ
Assertion
Ref Expression
ltnlei (𝐴 < 𝐵 ↔ ¬ 𝐵𝐴)

Proof of Theorem ltnlei
StepHypRef Expression
1 lt.2 . . 3 𝐵 ∈ ℝ
2 lt.1 . . 3 𝐴 ∈ ℝ
31, 2lenlti 10760 . 2 (𝐵𝐴 ↔ ¬ 𝐴 < 𝐵)
43con2bii 360 1 (𝐴 < 𝐵 ↔ ¬ 𝐵𝐴)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wb 208  wcel 2114   class class class wbr 5066  cr 10536   < clt 10675  cle 10676
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5203  ax-nul 5210  ax-pr 5330
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4568  df-pr 4570  df-op 4574  df-br 5067  df-opab 5129  df-xp 5561  df-cnv 5563  df-xr 10679  df-le 10681
This theorem is referenced by:  letrii  10765  nn0ge2m1nn  11965  0nelfz1  12927  fzpreddisj  12957  hashnn0n0nn  13753  hashge2el2dif  13839  n2dvds1OLD  15718  divalglem5  15748  divalglem6  15749  sadcadd  15807  htpycc  23584  pco1  23619  pcohtpylem  23623  pcopt  23626  pcopt2  23627  pcoass  23628  pcorevlem  23630  vitalilem5  24213  vieta1lem2  24900  ppiltx  25754  ppiublem1  25778  chtub  25788  axlowdimlem16  26743  axlowdim  26747  lfgrnloop  26910  lfuhgr1v0e  27036  lfgrwlkprop  27469  ballotlem2  31746  subfacp1lem1  32426  subfacp1lem5  32431  bcneg1  32968  poimirlem9  34916  poimirlem16  34923  poimirlem17  34924  poimirlem19  34926  poimirlem20  34927  poimirlem22  34929  fdc  35035  pellexlem6  39451  jm2.23  39613
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