Theorem xrnltled 11199

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

Step	Hyp	Ref	Expression
1		xrnltled.3	. 2 ⊢ (𝜑 → ¬ 𝐵 < 𝐴)
2		xrnltled.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ*)
3		xrnltled.2	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ*)
4	2, 3	xrlenltd 11196	. 2 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴))
5	1, 4	mpbird 257	1 ⊢ (𝜑 → 𝐴 ≤ 𝐵)

Syntax hints:  ¬ wn 3   → wi 4   ∈ wcel 2113   class class class wbr 5096  ℝ^*cxr 11163   < clt 11164   ≤ cle 11165

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 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2706  ax-sep 5239  ax-nul 5249  ax-pr 5375

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2713  df-cleq 2726  df-clel 2809  df-ral 3050  df-rex 3059  df-rab 3398  df-v 3440  df-dif 3902  df-un 3904  df-ss 3916  df-nul 4284  df-if 4478  df-sn 4579  df-pr 4581  df-op 4585  df-br 5097  df-opab 5159  df-xp 5628  df-cnv 5630  df-le 11170

This theorem is referenced by:  supxrub  13237  infxrlb  13248  ixxub  13280  ixxlb  13281  supicclub2  13418  radcnvle  26383  xrge0infssd  32790  infxrge0lb  32793  pimxrneun  45674  liminflbuz2  46001  icccncfext  46073