🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: sci.math.research
Article #168

Inequality question

#168
From: B. Strohmeier
Date: Thu, 17 Dec 1992 10:03
21 lines
1468 bytes
Can the following theorem be easily proofed?

Theorem:
Let 
    1. p_1\geq p_2\geq\ldots\geq p_n and q_1\geq q_2\geq\ldots\geq q_n
       with 0\leq p_i\leq 1 and 0\leq q_i\leq 1 \forall 1\leq i\leq n
    2. \sum_{i=1}^np_i=\sum_{i=1}^nq_i=1
       (imagine p_i and q_i as probabilities in decreasing order)       
    3. \sum_{i=1}^kp_i\geq\sum_{i=1}^kq_i \forall 1\leq k\leq n
       (the cumulated sum of p_i is always greater or equal than the 
        cumulated sum of q_i)
Then
    \sum_{i=1}^np_i(1-q_i)^\alpha\leq\sum_{i=1}^nq_i(1-p_i)^\alpha
    \forall real \alpha\geq 1 

If this is true, it follows that a weaker expert can better predict a
stronger expert than vice versa.
Thanks in advance. 		  

Bernhard Strohmeier
bstrohm@erasmus.hrz.uni-bielefeld.de
Technical Details
Message-ID: <Berni.6.724586581@nw42.wiwi.uni-bielefeld.de>
Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!dan

Show Full Headers
Complete Article Headers
Newsgroups: sci.math.research
Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!dan
From: Berni@nw42.wiwi.uni-bielefeld.de (B. Strohmeier)
Subject: Inequality question
Nntp-Posting-Host: wiwipc07.uni-bielefeld.de
Message-ID: <Berni.6.724586581@nw42.wiwi.uni-bielefeld.de>
Originator: dan@symcom.math.uiuc.edu
Sender: Daniel Grayson <dan@math.uiuc.edu>
X-Submissions-To: sci-math-research@uiuc.edu
Organization: Fakultaet fuer Wirtschaftswissenschaften, Uni Bielefeld, Germany
X-Administrivia-To: sci-math-research-request@uiuc.edu
Approved: Daniel Grayson <dan@math.uiuc.edu>
Date: Thu, 17 Dec 1992 10:03:01 GMT
Lines: 23