Spectral approximation of multiplication operators.
Spectral graph theory and the inverse eigenvalue problem of a graph.
Spectral integral variation of trees
In this paper, we determine all trees with the property that adding a particular edge will result in exactly two Laplacian eigenvalues increasing respectively by 1 and the other Laplacian eigenvalues remaining fixed. We also investigate a situation in which the algebraic connectivity is one of the changed eigenvalues.
Spectral properties of a certain class of Carleman operators
The object of the present work is to construct all the generalized spectral functions of a certain class of Carleman operators in the Hilbert space and establish the corresponding expansion theorems, when the deficiency indices are (1,1). This is done by constructing the generalized resolvents of and then using the Stieltjes inversion formula.
Spectral properties of sign symmetric matrices.
Spectral radius and seminorms in finite-dimensional algebras. II
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