Theorem ltlecasei 11230

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

Step	Hyp	Ref	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 11229	. . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 ≤ 𝐴 ∨ 𝐴 < 𝐵))
6	3, 4, 5	syl2anc 584	. 2 ⊢ (𝜑 → (𝐵 ≤ 𝐴 ∨ 𝐴 < 𝐵))
7	1, 2, 6	mpjaodan 960	1 ⊢ (𝜑 → 𝜓)

Syntax hints:   → wi 4   ∧ wa 395   ∨ wo 847   ∈ wcel 2113   class class class wbr 5095  ℝcr 11014   < clt 11155   ≤ cle 11156

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 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2705  ax-sep 5238  ax-nul 5248  ax-pr 5374

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2712  df-cleq 2725  df-clel 2808  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-dif 3901  df-un 3903  df-ss 3915  df-nul 4283  df-if 4477  df-sn 4578  df-pr 4580  df-op 4584  df-br 5096  df-opab 5158  df-xp 5627  df-cnv 5629  df-xr 11159  df-le 11161

This theorem is referenced by:  iccsplit  13389  expnbnd  14143  hashf1  14368  absmax  15241  sinltx  16102  iccntr  24740  pmltpclem2  25380  cniccbdd  25392  iccvolcl  25498  ioovolcl  25501  dyaddisjlem  25526  mbfposr  25583  itg1ge0a  25642  itg2monolem1  25681  itgioo  25747  c1lip1  25932  plyeq0lem  26145  aalioulem5  26274  pserulm  26361  tanord  26477  birthdaylem3  26893  fsumharmonic  26952  chpo1ubb  27422  cos9thpiminplylem1  33818  mblfinlem2  37721  ioodvbdlimc1  46058  ioodvbdlimc2  46060  ibliooicc  46096  fourierdlem107  46338