AbstractResults on ω- and τ-matrices are surveyed. The question whether an ω-matrix with positive leading principal minors is a τ-matrix is answered negatively. Other open questions are discussed. New conjectures and questions are introduced
AbstractThe question is raised whether the sum of the k×k principal minors of the titled matrix is a...
AbstractThe relation between positivity of principal minors, sign symmetry and stability of matrices...
AbstractThe singular values of principal submatrices of complex symmetric and skew matrices are exam...
AbstractResults on ω- and τ-matrices are surveyed. The question whether an ω-matrix with positive le...
AbstractHermitian positive definite, totally positive, and nonsingular M-matrices enjoy many common ...
3 pages, 1 article*On Principal Minors of Positive Definite Matrices* (Searle, S. R.) 3 page
AbstractIn this paper, we study and characterize various classes of matrices that are defined based ...
AbstractIn a recent paper by Engel and Schneider, it was asked if, for every n ⩾ 1, A ∈ τ<n> implies...
AbstractThe image of the principal minor map for n×n-matrices is shown to be closed. In the 19th cen...
AbstractThe author studies the construction of p.n.p. matrices, i.e., matrices with nonpositive prin...
• A matrix is a P0-matrix if and only if every principal minor is nonnegative. • The partial matrix ...
AbstractA N-matrix is a matrix with real entries whose principal minors are negative. We obtain some...
A result is given, relating the leading principal minors of a direct product of matrices to the lead...
AbstractWe propose several open problems on GKK τ-matrices raised by examples showing that some such...
• A matrix is a weakly sign symmetric P0-matrix (wss P0-matrix), if and only if every principal mino...
AbstractThe question is raised whether the sum of the k×k principal minors of the titled matrix is a...
AbstractThe relation between positivity of principal minors, sign symmetry and stability of matrices...
AbstractThe singular values of principal submatrices of complex symmetric and skew matrices are exam...
AbstractResults on ω- and τ-matrices are surveyed. The question whether an ω-matrix with positive le...
AbstractHermitian positive definite, totally positive, and nonsingular M-matrices enjoy many common ...
3 pages, 1 article*On Principal Minors of Positive Definite Matrices* (Searle, S. R.) 3 page
AbstractIn this paper, we study and characterize various classes of matrices that are defined based ...
AbstractIn a recent paper by Engel and Schneider, it was asked if, for every n ⩾ 1, A ∈ τ<n> implies...
AbstractThe image of the principal minor map for n×n-matrices is shown to be closed. In the 19th cen...
AbstractThe author studies the construction of p.n.p. matrices, i.e., matrices with nonpositive prin...
• A matrix is a P0-matrix if and only if every principal minor is nonnegative. • The partial matrix ...
AbstractA N-matrix is a matrix with real entries whose principal minors are negative. We obtain some...
A result is given, relating the leading principal minors of a direct product of matrices to the lead...
AbstractWe propose several open problems on GKK τ-matrices raised by examples showing that some such...
• A matrix is a weakly sign symmetric P0-matrix (wss P0-matrix), if and only if every principal mino...
AbstractThe question is raised whether the sum of the k×k principal minors of the titled matrix is a...
AbstractThe relation between positivity of principal minors, sign symmetry and stability of matrices...
AbstractThe singular values of principal submatrices of complex symmetric and skew matrices are exam...
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