Theorem ltlecasei 11319

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 11318	. . 3 ⊢ ((𝐵 ∈ ℝ ∧ 𝐴 ∈ ℝ) → (𝐵 ≤ 𝐴 ∨ 𝐴 < 𝐵))
6	3, 4, 5	syl2anc 595	. 2 ⊢ (𝜑 → (𝐵 ≤ 𝐴 ∨ 𝐴 < 𝐵))
7	1, 2, 6	mpjaodan 973	1 ⊢ (𝜑 → 𝜓)

Syntax hints:   → wi 4   ∧ wa 400   ∨ wo 860   ∈ wcel 2143   class class class wbr 5110  ℝcr 11100   < clt 11244   ≤ cle 11245

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-ext 2735  ax-sep 5258  ax-pr 5406

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-sb 2097  df-clab 2742  df-cleq 2755  df-clel 2838  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-br 5111  df-opab 5175  df-xp 5669  df-cnv 5671  df-xr 11248  df-le 11250

This theorem is referenced by:  iccsplit  13513  expnbnd  14270  hashf1  14496  absmax  15383  sinltx  16246  iccntr  24960  pmltpclem2  25589  cniccbdd  25601  iccvolcl  25707  ioovolcl  25710  dyaddisjlem  25735  mbfposr  25792  itg1ge0a  25851  itg2monolem1  25890  itgioo  25956  c1lip1  26137  plyeq0lem  26348  aalioulem5  26480  pserulm  26566  tanord  26684  birthdaylem3  27099  fsumharmonic  27157  chpo1ubb  27626  cos9thpiminplylem1  34153  mblfinlem2  38290  ioodvbdlimc1  46630  ioodvbdlimc2  46632  ibliooicc  46668  fourierdlem107  46910