
From:  Topi, Corrado 
Subject:  Re: Solving a very strange minimization problem with Octave 
Date:  Thu, 17 Sep 2009 18:22:31 +0100 
Useragent:  Thunderbird 2.0.0.23 (Windows/20090812) 
Dear Jaroslav, I apologize. The expression should read: min  D_ij  SUM p  SUM k A_pk Q_pkij  (1) Regards Jaroslav Hajek wrote:
On Thu, Sep 17, 2009 at 6:11 PM, Topi, Corrado <address@hidden> wrote:Dear Octaveians, I have to solve the following problem: min  D_ij  SUM p  SUM k A_pk Q_ij  (1)given that Q_ij is not dependent on p,k, it is, using your notation, SUM p  SUM k A_pk Q_ij = Q_ij SUM p  SUM k A_pk = Q_ij * C and you need to minimize  D_ij  C*Q_ij, i.e. a 2norm of a linear combination of two given matrices? If not, please clarify your expression.
 Corrado Topi Area 18,Department of Biology University of York, York, YO10 5YW, UK Phone: + 44 (0) 1904 328645, Email: address@hidden
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