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Theorem xrnltled 11391
Description: "Not less than" implies "less than or equal to". (Contributed by Glauco Siliprandi, 11-Dec-2019.)
Hypotheses
Ref Expression
xrnltled.1 (𝜑 → 𝐴 ∈ ℝ*)
xrnltled.2 (𝜑 → 𝐵 ∈ ℝ*)
xrnltled.3 (𝜑 → ¬ 𝐵 < 𝐴)
Assertion
Ref Expression
xrnltled (𝜑 → 𝐴 ≤ 𝐵)

Proof of Theorem xrnltled
StepHypRef Expression
1 xrnltled.3 . 2 (𝜑 → ¬ 𝐵 < 𝐴)
2 xrnltled.1 . . 3 (𝜑 → 𝐴 ∈ ℝ*)
3 xrnltled.2 . . 3 (𝜑 → 𝐵 ∈ ℝ*)
42, 3xrlenltd 11388 . 2 (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴))
51, 4mpbird 260 1 (𝜑 → 𝐴 ≤ 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   → wi 4   ∈ wcel 2146   class class class wbr 5106  ℝ*cxr 11355   < clt 11356   ≤ cle 11357
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1944  ax-6 2001  ax-7 2042  ax-8 2148  ax-9 2156  ax-ext 2735  ax-sep 5252  ax-pr 5395
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2101  df-clab 2742  df-cleq 2755  df-clel 2839  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4839  df-br 5107  df-opab 5171  df-xp 5661  df-cnv 5663  df-le 11362
This theorem is used by:  supxrub  13467  infxrlb  13478  ixxub  13510  ixxlb  13511  supicclub2  13648  radcnvle  26762  xrge0infssd  33409  infxrge0lb  33412  omssubadd  34988  pimxrneun  46643  liminflbuz2  46970  icccncfext  47042
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