منابع مشابه
A Note on Quadratic Maps for Hilbert Space Operators
In this paper, we introduce the notion of sesquilinear map on Β(H) . Based on this notion, we define the quadratic map, which is the generalization of positive linear map. With the help of this concept, we prove several well-known equality and inequality...
متن کاملInto a Hilbert Space
Nowak [N], improving a theorem due to A. N. Dranishnikov, G. Gong, V. Lafforgue, and G. Yu [DGLY], gave a characterization of coarse embeddability of general metric spaces into a Hilbert space using a result of Schoenberg on negative definite kernels. He used this characterization to show that the spaces Lp(μ) coarsely embed into a Hilbert space for p < 2. In this article, we show that lp does ...
متن کاملExploring Hilbert space: Accurate characterization of quantum information
A. G. White,* D. F. V. James, W. J. Munro, and P. G. Kwiat Department of Physics, University of Queensland, Brisbane, Queensland 4072, Australia Theory Division, T-4 and Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Maths, Cryptography and Security Group, Hewlett-Packard Laboratories, Bristol BS34 8QZ, United Kingdom Department of Physics, University of Il...
متن کاملA Rigid Space Homeomorphic to Hilbert Space
A rigid space is a topological vector space whose endomorphisms are all simply scalar multiples of the identity map. This is in sharp contrast to the behavior of operators on `2, and so rigid spaces are, from the viewpoint of functional analysis, fundamentally different from Hilbert space. Nevertheless, we show in this paper that a rigid space can be constructed which is topologically homeomorp...
متن کاملSampling in a Hilbert Space
An analog of the Whittaker-Shannon-Kotel′nikov sampling theorem is derived for functions with values in a separable Hilbert space. The proof uses the concept of frames and frame operators in a Hilbert space. One of the consequences of this theorem is that it allows us to derive sampling theorems associated with boundary-value problems and some homogeneous integral equations, which in turn gives...
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ژورنال
عنوان ژورنال: Proceedings of the American Mathematical Society
سال: 1974
ISSN: 0002-9939
DOI: 10.1090/s0002-9939-1974-0341038-7