Theorem xrnltled 11249

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 11247	. 2 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴))
5	1, 4	mpbird 257	1 ⊢ (𝜑 → 𝐴 ≤ 𝐵)

Syntax hints:  ¬ wn 3   → wi 4   ∈ wcel 2109   class class class wbr 5110  ℝ^*cxr 11214   < clt 11215   ≤ cle 11216

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2702  ax-sep 5254  ax-nul 5264  ax-pr 5390

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2709  df-cleq 2722  df-clel 2804  df-ral 3046  df-rex 3055  df-rab 3409  df-v 3452  df-dif 3920  df-un 3922  df-ss 3934  df-nul 4300  df-if 4492  df-sn 4593  df-pr 4595  df-op 4599  df-br 5111  df-opab 5173  df-xp 5647  df-cnv 5649  df-le 11221

This theorem is referenced by:  supxrub  13291  infxrlb  13302  ixxub  13334  ixxlb  13335  supicclub2  13472  radcnvle  26336  xrge0infssd  32691  infxrge0lb  32694  pimxrneun  45491  liminflbuz2  45820  icccncfext  45892