Positive definiteness of tridiagonal matrices via the numerical range.
Positive eigenvalues and two-letter generalized words.
Problème des moments matriciels sur la droite : construction d'une famille de solutions et questions d'unicité
Product of range symmetric block matrices in Minkowski space.
Pseudo-orthogonal polynomials.
Range symmetric matrices in Minkowski space.
Rank and inertia of submatrices of the Moore-Penrose inverse of a Hermitian matrix.
Reduction to normal form of a self-adjoint linear transformation with respect to a pseudo-unitary or a pseudo-Euclidean inner product.
Remarks on the rows and columns of in the matrix equation
Remarques sur les matrices orthogonales (resp. symétriques) à coefficients -adiques
Reverses of the Golden-Thompson type inequalities due to Ando-Hiai-Petz.
Rotation numbers for Jacobi matrices with matrix entries.
Schur complements of diagonally dominant matrices
Schur complements of generally diagonally dominant matrices and a criterion for irreducibility of matrices.
Shells of matrices in indefinite inner product spaces.
Solution of the problem of optimal diagonal scaling for quasi-real Hermitian positive-definite matrices.
Solving Confluent Vandermonde Systems of Hermite Type.
Solving linear systems with a Levinson-like solver.
Some inequalities for commutators and an application to spectral variation.
Some inequalities for spectral variations.