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Theorem nleltd 46199
Description: 'Not less than or equal to' implies 'grater than'. (Contributed by Glauco Siliprandi, 2-Jan-2022.)
Hypotheses
Ref Expression
nleltd.1 (𝜑𝐴 ∈ ℝ)
nleltd.2 (𝜑𝐵 ∈ ℝ)
nleltd.3 (𝜑 → ¬ 𝐵𝐴)
Assertion
Ref Expression
nleltd (𝜑𝐴 < 𝐵)

Proof of Theorem nleltd
StepHypRef Expression
1 nleltd.3 . 2 (𝜑 → ¬ 𝐵𝐴)
2 nleltd.1 . . 3 (𝜑𝐴 ∈ ℝ)
3 nleltd.2 . . 3 (𝜑𝐵 ∈ ℝ)
42, 3ltnled 11375 . 2 (𝜑 → (𝐴 < 𝐵 ↔ ¬ 𝐵𝐴))
51, 4mpbird 260 1 (𝜑𝐴 < 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3  wi 4  wcel 2146   class class class wbr 5114  cr 11117   < clt 11261  cle 11262
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-ext 2738  ax-sep 5262  ax-pr 5409
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2745  df-cleq 2758  df-clel 2841  df-ral 3083  df-rex 3093  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4290  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-br 5115  df-opab 5179  df-xp 5672  df-cnv 5674  df-xr 11265  df-le 11267
This theorem is used by:  limsup10exlem  46519
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