Spectral radius and seminorms in finite-dimensional algebras
Spectral radius preservers of products of monnegative matrices.
Spectral statistics.
Spectral study of alliances in graphs
In this paper we obtain several tight bounds on different types of alliance numbers of a graph, namely (global) defensive alliance number, global offensive alliance number and global dual alliance number. In particular, we investigate the relationship between the alliance numbers of a graph and its algebraic connectivity, its spectral radius, and its Laplacian spectral radius.
Spectral variation bounds for diagonalisable matrices.
Spectral versus classical Nevanlinna-Pick interpolation in dimension two.
Spectrally arbitrary complex sign pattern matrices.
Spectrally arbitrary tree sign patterns of order 4.
Spectrum localization of regular matrix polynomials and functions.
Spectrum of infinite block matrices and -triangular operators.
Spectrum of random Toeplitz matrices with band structure.
Spectrum preserving lower triangular completions -- the nonnegative nilpotent case.
Spektralradius und Spektralnorm
Spinor genera under field extensions, I
Spinors in braided geometry
Let V be a ℂ-space, be a pre-braid operator and let This paper offers a sufficient condition on (σ,F) that there exists a Clifford algebra Cl(V,σ,F) as the Chevalley F-dependent deformation of an exterior algebra . If and F is non-degenerate then F is not a σ-morphism in σ-braided monoidal category. A spinor representation as a left Cl(V,σ,F)-module is identified with an exterior algebra over F-isotropic ℂ-subspace of V. We give a sufficient condition on braid σ that the spinor representation...
Splitting of Hermitian Forms over Group Rings.
SPR0 substitutions and families of algebraic Riccati equations
We study in this paper Algebraic Riccati Equations associated with single-input single-output linear time-invariant systems bounded in -norm. Our study is focused in the characterization of families of Algebraic Riccati Equations in terms of strictly positive real (of zero relative degree) substitutions applied to the associated -norm bounded system, each substitution characterizing then a particular member of the family. We also consider here Algebraic Riccati Equations associated with systems...
Stabilité d'un algorithme de recherche de valeur propre de problème généralisé
Stabilité numérique de l'algorithme de Levinson
Stability and sensivity of Darboux transformation without parameter.