Contributions à l'étude spectrale des contractions de l'espace de Hilbert
Correction to "Method od orthogonal projections and approximation of the spectrum of a bounded operator" Studia Math. 65 (1979), 21-29
Decomposition of homogeneous vector fields of degree one and representation of the flow
Definition Theory and Systems of Simultaneous Equations in the Perdual of an Operator Algebra. II.
Dilatability of sesquilinear form-valued kernels
Dilatations des commutants d'opérateurs pour des espaces de Krein de fonctions analytiques
Soient et deux espaces de Krein de fonctions analytiques dans le disque unité invariants pour l’opérateur de déplacement à gauche et soit un opérateur linéaire continu de dans dont l’adjoint commute avec . Nous étudions les dilatations de qui conservent cette propriété de commutation et pour lesquelles les formes hermitiennes définies par et ont le même nombre de carrés négatifs. Nous obtenons ainsi une version du théorème de dilatation des commutants d’opérateurs dans le cadre...
Dilations of Banach space operator valued functions
Dilations of Hilbert space operators (General theory) [Book]
Dilations of Positive Operators: Construction and Ergodic Theory.
Dilations to systems of matrix units
Dirac Operations with Strongly Singular Potentials. Distinguished Self-Adjoint Extensions Constructed with a Spectral Gap Theorem and Cut-Off-Potentials.
Essential self-adjointness of many particle Schrödinger hamiltonians with singular two-body potentials
Essentially slant Hankel operators.
Estimates on the number of scattering poles near the real axis for strictly convex obstacles
For the Dirichlet Laplacian in the exterior of a strictly convex obstacle, we show that the number of scattering poles of modulus in a small angle near the real axis, can be estimated by Const for sufficiently large depending on . Here is the dimension.
Extension of Linear Operators
Extension of linear operators and Lipschitz maps into -spaces.
Extension of multiplicative families of isometries. (Extensión de familias multiplicativas de isometrías.)
Extension of operators from weak*-closed sub-spaces of into C(K) spaces
It is proved that every operator from a weak*-closed subspace of into a space C(K) of continuous functions on a compact Hausdorff space K can be extended to an operator from to C(K).
Extension of the Riesz Representation Theorem and Solution of the Maxwell-Boltzmann Functional Equation. (Short Communication).
Extension of the Riesz Representation Theorem and Solution of the Maxwell Functional Equation.