A characterization for the spectral capacity of a finite system of operators
A characterization of chaotic order and a problem.
A characterization of formally symmetric unbounded operators.
A characterization of the generators of analytic -semigroups in the class of scalar type spectral operators.
A Commutativity Theorem for Hermitian Operators.
A Geometrie Proof of the Spectral Theorem for Unbounded Self-Adjoint Operators.
A note on subnormal operators
A note on the differentiable structure of generalized idempotents
For a fixed n > 2, we study the set Λ of generalized idempotents, which are operators satisfying T n+1 = T. Also the subsets Λ†, of operators such that T n−1 is the Moore-Penrose pseudo-inverse of T, and Λ*, of operators such that T n−1 = T* (known as generalized projections) are studied. The local smooth structure of these sets is examined.
A note on the spectral operators of scalar type and semigroups of bounded linear operators.
A Potential-Theoretic Approach to Parallel Addition.
A remark concerning uniqueness of the Wold decomposition of finite-dimensional stationary processes.
The uniqueness of the Wold decomposition of a finite-dimensional stationary process without assumption of full rank stationary process and the Lebesgue decomposition of its spectral measure is easily obtained.
A Short Proof of Radjavi's Theorem on Self-Commutators.
A simple proof of the classification of normal Toeplitz matrices.
Absolute continuity and hyponormal operators.
Algebraic Characterization of Symmetrie Complex Banach Manifolds.
Algunas Caracterizaciones De Medidas Espectrales Extendibles.
An approximative solution of the generalized eigenvalue problem
An Inequality Involving a Hermitian Operator and its Square in a Normed Space
An Operator Inequality.
Analyse spectrale et théorème de prédiction statistique de Wiener