Terminal value problems of impulsive integro-differential equations in Banach spaces.
Ternary Jordan homomorphisms in -ternary algebras.
The 2D Schrödinger equation for a neutral pair in a constant magnetic field
The additive approximation on a four-variate Jensen-type operator equation.
The adjoint of a positive semigroup
The adjoint theorem on A-spaces.
The aftermath of the intermediate value theorem.
The algebra generated by a pair of operator weighted shifts
We present a model for two doubly commuting operator weighted shifts. We also investigate general pairs of operator weighted shifts. The above model generalizes the model for two doubly commuting shifts. WOT-closed algebras for such pairs are described. We also deal with reflexivity for such pairs assuming invertibility of operator weights and a condition on the joint point spectrum.
The Algebraic Multiplicity of Eigenvalues and the Evans Function Revisited
This paper is related to the spectral stability of traveling wave solutions of partial differential equations. In the first part of the paper we use the Gohberg-Rouche Theorem to prove equality of the algebraic multiplicity of an isolated eigenvalue of an abstract operator on a Hilbert space, and the algebraic multiplicity of the eigenvalue of the corresponding Birman-Schwinger type operator pencil. In the second part of the paper we apply this result...
The algebraic Riccati equation with Toeplitz matrices as coefficients.
The algebraic structure of delay-differential systems: a behavioral perspective
This paper presents a survey on the recent contributions to linear time- invariant delay-differential systems in the behavioral approach. In this survey both systems with commensurate and with noncommensurate delays will be considered. The emphasis lies on the investigation of the relationship between various systems descriptions. While this can be understood in a completely algebraic setting for systems with commensurate delays, this is not the case for systems with noncommensurate delays. In the...
The algebro-geometric Toda hierarchy initial value problem for complex-valued initial data.
The Allegretto-Piepenbrink theorem for strongly local Dirichlet forms.
The analytic theory of matrix orthogonal polynomials.
The application of fixed point theorems to global nonlinear controllability problems.
The Approximation of Generalized Turning Points by Projection Methods with Superconvergence to the Critical Parameter.
The arithmetic-geometric mean and its generalizations for noncommuting linear operators
The associated tensor norm to -absolutely summing operators on -spaces
We give an explicit description of a tensor norm equivalent on to the associated tensor norm to the ideal of -absolutely summing operators. As a consequence, we describe a tensor norm on the class of Banach spaces which is equivalent to the left projective tensor norm associated to .
The Atkinson theorem in Hilbert -modules over -algebras of compact operators.
The -weak compactness of weak Banach-Saks operators
We characterize Banach lattices on which every weak Banach-Saks operator is b-weakly compact.