种族被根除
发表于 2025-3-25 07:02:18
Commuting Triples of Subnormal Operators and Related Moment Problems,uţă and N. Suciu, {xc}, for commuting pairs) we shall give necessary and sufficient conditions on a triple indexed sequence of vectors from a Hilbert space such that it can be expressed as moments of an appropriate triple of commuting operators. We obtain an extension of Z. Sebestyén’s similar re
花束
发表于 2025-3-25 10:56:53
The Equality of the Reduced and the Full ,*-Algebras and the Amenability of a Topological Groupoid,d and the full .*-algebras. In this paper we shall prove the converse assertion under a technical hypothesis. We shall prove that if . is a locally compact second countable groupoid endowed with a Haar system having ”a bounded decomposition over the principal groupoid associated to .”, then the equa
刻苦读书
发表于 2025-3-25 13:59:24
-Numerical Radius in Banach Spaces,f the . classes, which can be naturally extended. Then, we give a first study of this concept. Some of the properties given in the Banach case are original, but most of them are a generalization of the Hilbert case, even if the proofs have to be done in completely different ways.
存心
发表于 2025-3-25 18:29:25
Generalized Toeplitz Operators and Cyclic Vectors,sociated with non zero elements of the point spectrum, when it is non void, of generalized Toeplitz operators. Introducing perturbed kernel, we consider classes . which extend the classical classes .. We give results about absolute continuity with respect to the Haar measure for operators in class .
手术刀
发表于 2025-3-25 21:13:32
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不如乐死去
发表于 2025-3-26 00:56:18
,Irreducible Subfactors Derived from Popa’s Construction for Non-Tracial States,states, to obtain an irreducible inclusion of . factors, . of index .. .(.) is identified with a subfactor inside the centralizer algebra of the canonical free product state on . ⋆ .(ℂ). Its structure is described by “infinite” semicircular elements as in {xc}..The irreducible subfactor inclusio
Pcos971
发表于 2025-3-26 07:36:35
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废除
发表于 2025-3-26 09:01:44
On the Distance between an Operator and an Ideal, two-sided ideal in .(.). If . is a tensor product of normed spaces, endowed with a tensor norm, an estimation is given for the distance of a tensor product operator . Є.(.) to .(.) and it is applied to the study of the quasi-nilpotency of tensor product operators modulo .(.).
发怨言
发表于 2025-3-26 14:08:24
Uniform Exponential Stability and Uniform Observability of Time-Varying Linear Stochastic Systems iic equations in Hilbert spaces. We give a representation of the covariance operator associated to the mild solutions of these equations which allow us to obtain a characterization of the uniform exponential stability of uniformly observable systems in terms of Lyapunov equations.
大包裹
发表于 2025-3-26 16:48:37
0255-0156 gle operator theory, C*-algebras, diffrential operators, intThe Romanian conferences in operator theory, as they are now commonly called, havestartedintheyear1976asanannualworkshoponoperatortheoryheldatthe University of Timi¸ soara, originally only with Romanian attendance. The meeting soon evolved