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Theorem lenlti 11341
Description: 'Less than or equal to' in terms of 'less than'. (Contributed by NM, 24-May-1999.)
Hypotheses
Ref Expression
lt.1 𝐴 ∈ ℝ
lt.2 𝐵 ∈ ℝ
Assertion
Ref Expression
lenlti (𝐴𝐵 ↔ ¬ 𝐵 < 𝐴)

Proof of Theorem lenlti
StepHypRef Expression
1 lt.1 . 2 𝐴 ∈ ℝ
2 lt.2 . 2 𝐵 ∈ ℝ
3 lenlt 11299 . 2 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴𝐵 ↔ ¬ 𝐵 < 𝐴))
41, 2, 3mp2an 705 1 (𝐴𝐵 ↔ ¬ 𝐵 < 𝐴)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3  wb 209  wcel 2146   class class class wbr 5111  cr 11110   < clt 11254  cle 11255
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-ext 2737  ax-sep 5259  ax-pr 5406
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2744  df-cleq 2757  df-clel 2840  df-ral 3082  df-rex 3092  df-rab 3419  df-v 3459  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4287  df-if 4490  df-sn 4592  df-pr 4594  df-op 4598  df-br 5112  df-opab 5176  df-xp 5669  df-cnv 5671  df-xr 11258  df-le 11260
This theorem is used by:  ltnlei  11342  hashgt12el  14473  hashgt12el2  14474  georeclim  15945  geoisumr  15951  divalglem6  16474  umgrislfupgrlem  29503  ballotlem4  34930  signswch  34989  limsup10ex  46520
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