Results 151 to 160 of about 71,699 (272)

Indecomposable positive maps on positive semidefinite matrices from Mn to Mn+1 [PDF]

open access: gold, 2021
WINDA CHARLES AKATCH   +2 more
openalex   +1 more source

TRACE INEQUALITIES OF POSITIVE SEMIDEFINITE MATRICES

open access: yes, 2006
In this paper, the trace inequalities involving special products of the positive semidefinite matrices are investigated. The trace inequalities between the Kronecker product and Kronecker sum of two matrices is obtained as in the short note Yang’s inequalities.
ÖZEL, Mustafa   +3 more
openaire   +2 more sources

Preconditioning by an extended matrix technique for convection-diffusion-reaction equations

open access: yesJournal of Numerical Analysis and Approximation Theory, 2008
In this paper we consider a preconditioning technique for the ill-conditioned systems arising from discretisations of nonsymmetric elliptic boundary value problems.
Aurelian Nicola, Constantin Popa
doaj   +2 more sources

A sequential semidefinite programming method and an application in passive reduced-order modeling

open access: yes, 2005
We consider the solution of nonlinear programs with nonlinear semidefiniteness constraints. The need for an efficient exploitation of the cone of positive semidefinite matrices makes the solution of such nonlinear semidefinite programs more complicated ...
Freund, Roland W.   +2 more
core  

Inequalities Involving Hadamard Products of Positive Semidefinite Matrices

open access: yesJournal of Mathematical Analysis and Applications, 2000
This paper is an extension of two inequalities. An inequality established by \textit{G. P. H. Styan} [Linear Algebra Appl. 6, 217-240 (1973; Zbl 0255.15002)] is on the Hadamard product and a correlation matrix. An inequality obtained by \textit{B. Wang} and \textit{F. Zhang} [Linear Multilinear Algebra 43, No.
openaire   +1 more source

On classes of matrices containing M-matrices and hermitian positive semidefinite matrices

open access: yesLinear Algebra and its Applications, 1984
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Semidefinite geometry of the numerical range

open access: yes, 2008
The numerical range of a matrix is studied geometrically via the cone of positive semidefinite matrices (or semidefinite cone for short). In particular it is shown that the feasible set of a two-dimensional linear matrix inequality (LMI), an affine ...
Henrion, Didier
core   +1 more source

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