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Theorem ltlecasei 11457
Description: Ordering elimination by cases. (Contributed by NM, 1-Jul-2007.) (Proof shortened by Mario Carneiro, 27-May-2016.)
Hypotheses
Ref Expression
ltlecasei.1 ((𝜑 ∧ 𝐴 < 𝐵) → 𝜓)
ltlecasei.2 ((𝜑 ∧ 𝐵 ≤ 𝐴) → 𝜓)
ltlecasei.3 (𝜑 → 𝐴 ∈ ℝ)
ltlecasei.4 (𝜑 → 𝐵 ∈ ℝ)
Assertion
Ref Expression
ltlecasei (𝜑 → 𝜓)

Proof of Theorem ltlecasei
StepHypRef Expression
1 ltlecasei.2 . 2 ((𝜑 ∧ 𝐵 ≤ 𝐴) → 𝜓)
2 ltlecasei.1 . 2 ((𝜑 ∧ 𝐴 < 𝐵) → 𝜓)
3 ltlecasei.4 . . 3 (𝜑 → 𝐵 ∈ ℝ)
4 ltlecasei.3 . . 3 (𝜑 → 𝐴 ∈ ℝ)
5 lelttric 11456 . . 3 ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 ≤ 𝐴 ∨ 𝐴 < 𝐵))
63, 4, 5syl2anc 596 . 2 (𝜑 → (𝐵 ≤ 𝐴 ∨ 𝐴 < 𝐵))
71, 2, 6mpjaodan 973 1 (𝜑 → 𝜓)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∨ wo 861   ∈ wcel 2147   class class class wbr 5108  ℝcr 11238   < clt 11382   ≤ cle 11383
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 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735  ax-sep 5255  ax-pr 5398
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 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4841  df-br 5109  df-opab 5174  df-xp 5664  df-cnv 5666  df-xr 11386  df-le 11388
This theorem is used by:  iccsplit  13656  expnbnd  14417  hashf1  14643  absmax  15540  sinltx  16401  iccntr  25196  pmltpclem2  25825  cniccbdd  25837  iccvolcl  25943  ioovolcl  25946  dyaddisjlem  25971  mbfposr  26028  itg1ge0a  26087  itg2monolem1  26126  itgioo  26191  c1lip1  26372  plyeq0lem  26584  aalioulem5  26720  pserulm  26806  tanord  26923  birthdaylem3  27338  fsumharmonic  27396  chpo1ubb  27865  cos9thpiminplylem1  34525  mblfinlem2  38844  ioodvbdlimc1  47216  ioodvbdlimc2  47218  ibliooicc  47254  fourierdlem107  47496
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