Bibliografías temáticas / Hilbert space operators

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Literatura académica sobre el tema "Hilbert space operators"

Autor: Grafiati
Publicado: 6 de septiembre de 2023
Última modificación: 31 de julio de 2025

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Artículos de revistas sobre el tema "Hilbert space operators"

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Agniel, Vidal. "Unitary skew-dilations of Hilbert space operators." Extracta Mathematicae 35, no. 2 (2020): 137–84. http://dx.doi.org/10.17398/2605-5686.35.2.137.

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Kérchy, László. "Pluquasisimilar Hilbert space operators." Acta Scientiarum Mathematicarum 86, no. 34 (2020): 503–20. http://dx.doi.org/10.14232/actasm-020-973-4.

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Rugiri, Peter Githara. "Spectrum of bounded operators in Hilbert spaces." Editon Consortium Journal of Physical and Applied Sciences 3, no. 1 (2023): 102–8. http://dx.doi.org/10.51317/ecjpas.v3i1.411.

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This paper sought to study the spectrum operators by emphasising on condition of commuting operators so as to expose classes of operators. Here study of various classes of bounded operators on a Hilbert space H is one of the most important topics in the preparation of the study of the Hilbert spaces. In case a abounded operator A commutes at least with its own adjoint A* it forms important classes of operators on H, eg normal, unitary, self – adjoint etc. The operators under the study are bounded operators operating in a complete space called Hilbert spaces.
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Dixmier, Jacques. "Operateurs hypofermes." Journal of Operator Theory 91, no. 2 (2024): 323–33. https://doi.org/10.7900/jot.2023nov13.2451.

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Range spaces of bounded linear operators between Hilbert spaces, as well as linear operators between Hilbert spaces, whose graph is a bounded linear range of some Hilbert space, were systematically studied in an early paper. Here extensions of the above topics to the framework of general Banach spaces are discussed. A hypoclosed linear subspace of a Banach space is the range space of a bounded linear operator defined on some Banach space, while a hypoclosed linear operator is a linear operator between Banach spaces, whose graph is hypoclosed. Characterizations, permanence properties, pathologi
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Carmo, Joao R., and S. Waleed Noor. "Universal composition operators." Journal of Operator Theory 87, no. 1 (2021): 137–56. http://dx.doi.org/10.7900/jot.2020aug03.2301.

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A Hilbert space operator U is called \textit{universal} (in the sense of Rota) if every Hilbert space operator is similar to a multiple of U restricted to one of its invariant subspaces. It follows that the \textit{invariant subspace problem} for Hilbert spaces is equivalent to the statement that all minimal invariant subspaces for U are one dimensional. In this article we characterize all linear fractional composition operators Cϕf=f∘ϕ that have universal translates on both the classical Hardy spaces H2(C+) and H2(D) of the half-plane and the unit disk, respectively. The new example here is t
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Jarchow, Hans. "Factoring absolutely summing operators through Hilbert-Schmidt operators." Glasgow Mathematical Journal 31, no. 2 (1989): 131–35. http://dx.doi.org/10.1017/s0017089500007643.

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Let K be a compact Hausdorff space, and let C(K) be the corresponding Banach space of continuous functions on K. It is well-known that every 1-summing operator S:C(K)→l2 is also nuclear, and therefore factors S = S1S2, with S1:l2→l2 a Hilbert–Schmidt operator and S1:C(K)→l2 a bounded operator. It is easily seen that this latter property is preserved when C(K) is replaced by any quotient, and that a Banach space X enjoys this property if and only if its second dual, X**, does. This led A. Pełczyński [15] to ask if the second dual of a Banach space X must be isomorphic to a quotient of a C(K)-sp
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Krnić, Mario. "Hilbert-type inequalities for Hilbert space operators." Quaestiones Mathematicae 36, no. 2 (2013): 209–23. http://dx.doi.org/10.2989/16073606.2013.801148.

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JUNG, IL BONG, EUNGIL KO, and CARL PEARCY. "ALMOST INVARIANT HALF-SPACES FOR OPERATORS ON HILBERT SPACE." Bulletin of the Australian Mathematical Society 97, no. 1 (2017): 133–40. http://dx.doi.org/10.1017/s0004972717000533.

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The theory of almost invariant half-spaces for operators on Banach spaces was begun recently and is now under active development. Much less attention has been given to almost invariant half-spaces for operators on Hilbert space, where some techniques and results are available that are not present in the more general context of Banach spaces. In this note, we begin such a study. Our much simpler and shorter proofs of the main theorems have important consequences for the matricial structure of arbitrary operators on Hilbert space.
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Moghaddam, Sadaf Fakri, та Alireza Kamel Mirmostafaee. "Numerical Radius of Bounded Operators with ℓ p -Norm". Tatra Mountains Mathematical Publications 81, № 1 (2022): 155–64. http://dx.doi.org/10.2478/tmmp-2022-0012.

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Abstract We study the numerical radius of bounded operators on direct sum of a family of Hilbert spaces with respect to the ℓ p -norm, where 1 ≤ p ≤∞. We propose a new method which enables us to prove validity of many inequalities on numerical radius of bounded operators on Hilbert spaces when the underling space is a direct sum of Hilbert spaces with ℓ p -norm, where 1 ≤ p ≤ 2. We also provide an example to show that some known results on numerical radius are not true for a space that is the set of bounded operators on ℓ p -sum of Hilbert spaces where 2 <p < ∞. We also present some appl
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MacLennan, Bruce James. "Cognition in Hilbert space." Behavioral and Brain Sciences 36, no. 3 (2013): 296–97. http://dx.doi.org/10.1017/s0140525x1200283x.

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AbstractUse of quantum probability as a top-down model of cognition will be enhanced by consideration of the underlying complex-valued wave function, which allows a better account of interference effects and of the structure of learned and ad hoc question operators. Furthermore, the treatment of incompatible questions can be made more quantitative by analyzing them as non-commutative operators.
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Tesis sobre el tema "Hilbert space operators"

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邱彩娜 and Choi-nai Charlies Tu. "Generalized spectral norms of Hilbert space operators." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31220010.

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Tu, Choi-nai Charlies. "Generalized spectral norms of Hilbert space operators /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19737452.

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Tian, Feng. "On commutativity of unbounded operators in Hilbert space." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/1095.

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We study several unbounded operators with view to extending von Neumann's theory of deficiency indices for single Hermitian operators with dense domain in Hilbert space. If the operators are non-commuting, the problems are difficult, but special cases may be understood with the use representation theory. We will further study the partial derivative operators in the coordinate directions on the L2 space on various covering surfaces of the punctured plane. The operators are defined on the common dense domain of C∞ functions with compact support, and they separately are essentially selfadjoint, b
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Kiteu, Marco M. "Orbits of operators on Hilbert space and some classes of Banach spaces." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1341850621.

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Hansen, A. C. "On the approximation of spectra of linear Hilbert space operators." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603665.

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The main topic of this thesis is how to approximate and compute spectra of linear operators on separable Hilbert spaces. We consider several approaches including the finite section method, an infinite-dimensional version of the QR algorithm, as well as pseudospectral techniques. Several new theorems about convergence of the finite section method (and variants of it) for self-adjoint problems are obtained together with a rigorous analysis of the infinite-dimensional QR algorithm for normal operators. To attack the general spectral problem we look to the pseudospectral theory and introduce the c
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Guven, Ayse. "Quantitative perturbation theory for compact operators on a Hilbert space." Thesis, Queen Mary, University of London, 2016. http://qmro.qmul.ac.uk/xmlui/handle/123456789/23197.

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This thesis makes novel contributions to a problem of practical and theoretical importance, namely how to determine explicitly computable upper bounds for the Hausdorff distance of the spectra of two compact operators on a Hilbert space in terms of the distance of the two operators in operator norm. It turns out that the answer depends crucially on the speed of decay of the sequence of singular values of the two operators. To this end, 'compactness classes', that is, collections of operators the singular values of which decay at a certain speed, are introduced and their functional analytic pro
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Alcántara, Bode Julio. "A criteria of completeness for compact operators in Hilbert space." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/97122.

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A necessary and sufficient condition is given for completeness of the set of eigenfunctions and generalized eigenfunctions associated to the non zero eigenvalues of a compact operator on a Hilbert Space.
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Sutton, Daniel Joseph. "Structure of Invariant Subspaces for Left-Invertible Operators on Hilbert Space." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/28807.

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This dissertation is primarily concerned with studying the invariant subspaces of left-invertible, weighted shifts, with generalizations to left-invertible operators where applicable. The two main problems that are researched can be stated together as When does a weighted shift have the one-dimensional wandering subspace property for all of its closed, invariant subspaces? This can fail either by having a subspace that is not generated by its wandering subspace, or by having a subspace with an index greater than one. For the former we show that every left-invertible, weighted shift is similar
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Raney, Michael W. "Abstract backward shifts of finite multiplicity /." view abstract or download file of text, 2002. http://wwwlib.umi.com/cr/uoregon/fullcit?p3061962.

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Thesis (Ph. D.)--University of Oregon, 2002.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaf 55). Also available for download via the World Wide Web; free to University of Oregon users.
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Kazemi, Parimah. "Compact Operators and the Schrödinger Equation." Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5453/.

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In this thesis I look at the theory of compact operators in a general Hilbert space, as well as the inverse of the Hamiltonian operator in the specific case of L2[a,b]. I show that this inverse is a compact, positive, and bounded linear operator. Also the eigenfunctions of this operator form a basis for the space of continuous functions as a subspace of L2[a,b]. A numerical method is proposed to solve for these eigenfunctions when the Hamiltonian is considered as an operator on Rn. The paper finishes with a discussion of examples of Schrödinger equations and the solutions.
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Libros sobre el tema "Hilbert space operators"

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Kubrusly, Carlos S. Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0.

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Sunder, V. S. Operators on Hilbert Space. Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1816-9.

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Hiai, Fumio, and Hideki Kosaki. Means of Hilbert Space Operators. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/b13213.

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Hiai, Fumio. Means of Hilbert space operators. Graduate School of Mathematics, Kyushu University, 2002.

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Dunford, Nelson. Linear operators.: Self adjoint operators in Hilbert space. Interscience Publishers, 1988.

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Livšic, Moshe S., and Leonid L. Waksman. Commuting Nonselfadjoint Operators in Hilbert Space. Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/bfb0078925.

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Axler, Sheldon, Peter Rosenthal, and Donald Sarason, eds. A Glimpse at Hilbert Space Operators. Springer Basel, 2010. http://dx.doi.org/10.1007/978-3-0346-0347-8.

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Sołtan, Piotr. A Primer on Hilbert Space Operators. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92061-0.

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1946-, Exner Pavel, and Havlíček Miloslav, eds. Hilbert space operators in quantum physics. American Institute of Physics, 1994.

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Blank, Jirí. Hilbert space operators in quantum Physics. American Institute of Physics, 1994.

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Capítulos de libros sobre el tema "Hilbert space operators"

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Kubrusly, Carlos S. "Quasireducible Operators." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_11.

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Kubrusly, Carlos S. "Hyponormal Operators." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_7.

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Kubrusly, Carlos S. "Paranormal Operators." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_9.

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Kubrusly, Carlos S. "Hilbert Space Operators." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_2.

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Farenick, Douglas. "Hilbert Space Operators." In Fundamentals of Functional Analysis. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-45633-1_10.

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Kubrusly, Carlos S. "Invariant Subspaces." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_1.

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Kubrusly, Carlos S. "Proper Contractions." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_10.

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Kubrusly, Carlos S. "The Lomonosov Theorem." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_12.

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Kubrusly, Carlos S. "Convergence and Stability." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_3.

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Kubrusly, Carlos S. "Reducing Subspaces." In Hilbert Space Operators. Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2064-0_4.

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Actas de conferencias sobre el tema "Hilbert space operators"

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Saito, Takafumi, and Yumiharu Nakano. "Solving Monge Problem by Hilbert Space Embeddings of Probability Measures." In 14th International Conference on Operations Research and Enterprise Systems. SCITEPRESS - Science and Technology Publications, 2025. https://doi.org/10.5220/0013167600003893.

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Lange, H. J. "Spectral representation of linear operators in the Hilbert space." In 1998 4th International Conference on Actual Problems of Electronic Instrument Engineering Proceedings. APEIE-98. IEEE, 1998. http://dx.doi.org/10.1109/apeie.1998.768958.

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JI, UN CIG. "Integral Representation of Hilbert–Schmidt Operators on Boson Fock Space." In Stochastic Analysis: Classical and Quantum - Perspectives of White Noise Theory. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701541_0004.

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Gahinet, P., M. Sorine, A. J. Laub, and C. Kenney. "Stability margins and Lyapunov equations for linear operators in Hilbert space." In 29th IEEE Conference on Decision and Control. IEEE, 1990. http://dx.doi.org/10.1109/cdc.1990.203444.

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Maibed, Zena Hussein, Nadia Faiq Mohammed, and Areej Salah Mohammed. "On proximal point schemes of nonlinear multivalued operators in Hilbert space." In 6TH INTERNATIONAL CONFERENCE FOR PHYSICS AND ADVANCE COMPUTATION SCIENCES: ICPAS2024. AIP Publishing, 2025. https://doi.org/10.1063/5.0265792.

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BALAZS, Peter. "Banach frames and atomic decompositions in the space of bounded operators on Hilbert spaces." In 2019 13th International conference on Sampling Theory and Applications (SampTA). IEEE, 2019. http://dx.doi.org/10.1109/sampta45681.2019.9030926.

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Unser, Michael A. "General Hilbert space framework for the discretization of continuous signal processing operators." In SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, edited by Andrew F. Laine and Michael A. Unser. SPIE, 1995. http://dx.doi.org/10.1117/12.217597.

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Balas, Mark J., and Susan A. Frost. "Adaptive Tracking Control for Linear Infinite Dimensional Systems." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9098.

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Tracking an ensemble of basic signals is often required of control systems in general. Here we are given a linear continuous-time infinite-dimensional plant on a Hilbert space and a space of tracking signals generated by a finite basis, and we show that there exists a stabilizing direct adaptive control law that will stabilize the plant and cause it to asymptotically track any member of this collection of signals. The plant is described by a closed, densely defined linear operator that generates a continuous semigroup of bounded operators on the Hilbert space of states. There is no state or pa
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Balas, Mark J. "Augmentation of Fixed Gain Controlled Infinite Dimensional Systems With Direct Adaptive Control." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23179.

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Abstract Linear infinite dimensional systems are described by a closed, densely defined linear operator that generates a continuous semigroup of bounded operators on a general Hilbert space of states and are controlled via a finite number of actuators and sensors. Many distributed applications are included in this formulation, such as large flexible aerospace structures, adaptive optics, diffusion reactions, smart electric power grids, and quantum information systems. In this paper, we focus on infinite dimensional linear systems for which a fixed gain linear infinite or finite dimensional con
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Cipolla, Jeffrey L. "Transient Infinite Elements for Acoustics and Shock." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0400.

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Abstract Many phenomena in acoustically loaded structural vibrations are better understood in the time domain, particularly transient radiation, shock, and problems involving nonlinearities and bulk structural motion. In addition, the geometric complexity of structures of interest drives the analyst toward domain-discretized solution methods, such as finite elements or finite differences, and large numbers of degrees of freedom. In such methods, efficient numerical enforcement of the Sommerfeld radiation condition in the time domain becomes difficult; although a great many methodologies for do
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Informes sobre el tema "Hilbert space operators"

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Korezlioglu, H., and C. Martias. Stochastic Integration for Operator Valued Processes on Hilbert Spaces and on Nuclear Spaces. Revision. Defense Technical Information Center, 1986. http://dx.doi.org/10.21236/ada168501.

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