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%Sivakumar
%Koratti Chengalrayan","kcskumar@iitm.ac.in","
\section{Least Elements of Polyhedral Sets and Nonnegative Generalized Inverses} By {\sl Debashisha Mishra and Sivakumar K.C.}.  

\medskip  \noindent A classical result due to Cottle and Veinott gives a characterization of the existence of the least element of a specific polyhedral set defined by a matrix, in terms of nonnegativity of a left-inverse of the matrix. In this talk we present extensions of this result to semi-infinite matrices and characterize nonnegativity of certain classes of generalized inverses.
%Least elements, polyhedral sets, nonnegative generalized inverse.","15A09","90C05","","05:56:35","Thu Feb 21 2008","203.199.213.66"
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