International audienceWe obtain several norm and eigenvalue inequalities for positive matrices partitioned into four blocks. The results involve the numerical range W (X) of the off-diagonal block X, especially the distance d from 0 to W (X). A special consequence is an estimate, diam W A X X * B − diam W A + B 2 ≥ 2d, between the diameters of the numerical ranges for the full matrix and its partial trace
This paper aims to give singular value and norm inequalities associated with $2\times 2$ positive se...
AbstractIn this paper, we prove the converse of a well known result in the field of the numerical ra...
The block numerical range (BNR) of a block operator matrix is a generalization of the numerical rang...
International audienceWe obtain several norm and eigenvalue inequalities for positive matrices parti...
International audienceWe obtain several norm and eigenvalue inequalities for positive matrices parti...
International audienceWe obtain several norm and eigenvalue inequalities for positive matrices parti...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
AbstractWe study some properties of the numerical radius of matrices with non-negative entries, and ...
The block numerical range (BNR) of a block operator matrix is a generalization of the numerical rang...
Abstract. For nn complex matrices A and an nn Hermitian matrix S, we consider the S-numerical range ...
We will discuss numerical ranges of matrices, primarily focusing on the shapes they can take. We wi...
The numerical range of a matrix is a set of complex numbers that contains all the eigen- values of t...
This paper aims to give singular value and norm inequalities associated with $2\times 2$ positive se...
AbstractIn this paper, we prove the converse of a well known result in the field of the numerical ra...
The block numerical range (BNR) of a block operator matrix is a generalization of the numerical rang...
International audienceWe obtain several norm and eigenvalue inequalities for positive matrices parti...
International audienceWe obtain several norm and eigenvalue inequalities for positive matrices parti...
International audienceWe obtain several norm and eigenvalue inequalities for positive matrices parti...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
International audienceWe prove the operator norm inequality, for a positive matrix partitioned into ...
AbstractWe study some properties of the numerical radius of matrices with non-negative entries, and ...
The block numerical range (BNR) of a block operator matrix is a generalization of the numerical rang...
Abstract. For nn complex matrices A and an nn Hermitian matrix S, we consider the S-numerical range ...
We will discuss numerical ranges of matrices, primarily focusing on the shapes they can take. We wi...
The numerical range of a matrix is a set of complex numbers that contains all the eigen- values of t...
This paper aims to give singular value and norm inequalities associated with $2\times 2$ positive se...
AbstractIn this paper, we prove the converse of a well known result in the field of the numerical ra...
The block numerical range (BNR) of a block operator matrix is a generalization of the numerical rang...
Add to ORKG