Theorem lenlti 11365

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	⊢ (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)

Proof of Theorem lenlti

Step	Hyp	Ref	Expression
1		lt.1	. 2 ⊢ 𝐴 ∈ ℝ
2		lt.2	. 2 ⊢ 𝐵 ∈ ℝ
3		lenlt 11323	. 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴))
4	1, 2, 3	mp2an 691	1 ⊢ (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴)

Syntax hints:  ¬ wn 3   ↔ wb 205   ∈ wcel 2099   class class class wbr 5148  ℝcr 11138   < clt 11279   ≤ cle 11280

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2101  ax-9 2109  ax-ext 2699  ax-sep 5299  ax-nul 5306  ax-pr 5429

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 847  df-3an 1087  df-tru 1537  df-fal 1547  df-ex 1775  df-sb 2061  df-clab 2706  df-cleq 2720  df-clel 2806  df-ral 3059  df-rex 3068  df-rab 3430  df-v 3473  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-nul 4324  df-if 4530  df-sn 4630  df-pr 4632  df-op 4636  df-br 5149  df-opab 5211  df-xp 5684  df-cnv 5686  df-xr 11283  df-le 11285

This theorem is referenced by:  ltnlei  11366  hashgt12el  14414  hashgt12el2  14415  georeclim  15851  geoisumr  15857  divalglem6  16375  umgrislfupgrlem  28948  ballotlem4  34118  signswch  34193  limsup10ex  45161

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