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Theorem lensymd 10390
Description: 'Less than or equal to' implies 'not less than'. (Contributed by Glauco Siliprandi, 11-Dec-2019.)
Hypotheses
Ref Expression
ltd.1 (𝜑𝐴 ∈ ℝ)
ltd.2 (𝜑𝐵 ∈ ℝ)
lensymd.3 (𝜑𝐴𝐵)
Assertion
Ref Expression
lensymd (𝜑 → ¬ 𝐵 < 𝐴)

Proof of Theorem lensymd
StepHypRef Expression
1 lensymd.3 . 2 (𝜑𝐴𝐵)
2 ltd.1 . . 3 (𝜑𝐴 ∈ ℝ)
3 ltd.2 . . 3 (𝜑𝐵 ∈ ℝ)
42, 3lenltd 10385 . 2 (𝜑 → (𝐴𝐵 ↔ ¬ 𝐵 < 𝐴))
51, 4mpbid 222 1 (𝜑 → ¬ 𝐵 < 𝐴)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wcel 2145   class class class wbr 4786  cr 10137   < clt 10276  cle 10277
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-sep 4915  ax-nul 4923  ax-pr 5034
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 837  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-eu 2622  df-mo 2623  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3353  df-dif 3726  df-un 3728  df-in 3730  df-ss 3737  df-nul 4064  df-if 4226  df-sn 4317  df-pr 4319  df-op 4323  df-br 4787  df-opab 4847  df-xp 5255  df-cnv 5257  df-xr 10280  df-le 10282
This theorem is referenced by:  lbinf  11178  prodge0rd  12140  infmrp1  12379  addmodlteq  12953  ccatalpha  13575  lcmgcdlem  15527  nmoleub2lem3  23134  pntlem3  25519  unblimceq0lem  32834  mblfinlem2  33780  imo72b2  39001  climisp  40496  stoweidlem52  40786  fourierdlem10  40851  fourierdlem12  40853  fourierdlem20  40861  fourierdlem50  40890  fourierdlem54  40894  fourierdlem103  40943  fouriersw  40965  etransclem35  41003  etransc  41017
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