Theorem nltled 10790

Description: 'Not less than ' implies 'less than or equal to'. (Contributed by Glauco Siliprandi, 11-Dec-2019.)

Hypotheses

Ref	Expression
ltd.1	⊢ (𝜑 → 𝐴 ∈ ℝ)
ltd.2	⊢ (𝜑 → 𝐵 ∈ ℝ)
nltled.1	⊢ (𝜑 → ¬ 𝐵 < 𝐴)

Assertion

Ref	Expression
nltled	⊢ (𝜑 → 𝐴 ≤ 𝐵)

Proof of Theorem nltled

Step	Hyp	Ref	Expression
1		nltled.1	. 2 ⊢ (𝜑 → ¬ 𝐵 < 𝐴)
2		ltd.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ)
3		ltd.2	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ)
4	2, 3	lenltd 10786	. 2 ⊢ (𝜑 → (𝐴 ≤ 𝐵 ↔ ¬ 𝐵 < 𝐴))
5	1, 4	mpbird 259	1 ⊢ (𝜑 → 𝐴 ≤ 𝐵)

Syntax hints:  ¬ wn 3   → wi 4   ∈ wcel 2114   class class class wbr 5066  ℝcr 10536   < clt 10675   ≤ cle 10676

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 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5203  ax-nul 5210  ax-pr 5330

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4568  df-pr 4570  df-op 4574  df-br 5067  df-opab 5129  df-xp 5561  df-cnv 5563  df-xr 10679  df-le 10681

This theorem is referenced by:  dedekind  10803  suprub  11602  infrelb  11626  suprzub  12340  prodge0rd  12497  seqf1olem1  13410  bitsfzolem  15783  bitsmod  15785  reconnlem2  23435  ioombl1lem4  24162  dgrub  24824  dgrlb  24826  1smat1  31069  imo72b2  40545  dvbdfbdioolem2  42234  stoweidlem14  42319  fourierdlem10  42422  fourierdlem12  42424  fourierdlem20  42432  fourierdlem24  42436  fourierdlem50  42461  fourierdlem54  42465  fourierdlem63  42474  fourierdlem65  42476  fourierdlem75  42486  fourierdlem79  42490  fouriersw  42536  etransclem3  42542  etransclem7  42546  etransclem10  42549  etransclem15  42554  etransclem20  42559  etransclem21  42560  etransclem22  42561  etransclem24  42563  etransclem25  42564  etransclem27  42566  etransclem32  42571