Results 61 to 70 of about 3,155 (225)
Reflectionless Herglotz Functions and Jacobi Matrices [PDF]
Communications in Mathematical Physics, 2008 A measure \(\mu\) on \(\mathbb R\) is said to be reflectionless on a compact set \(E \subset \mathbb R\) if its Stieltjes transform has purely imaginary boundary values almost everywhere on \(E\). If the set \(E\) is homogeneous, that is, there is \(\epsilon>0\) such that \(|E\cap(x-h,x+h)|>\epsilon h\) for all \(x\in E\) and \(h\in(0,\text{diam }E]\),
Poltoratski, Alexei, Remling, Christian
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Advanced Science, EarlyView.This study presents printed magnetoresistive sensors with a vertically aligned architecture that enables high optical transparency and mechanical flexibility. By integrating deep learning for the analysis of complex spatiotemporal signal patterns, the system further achieves intelligent multimodal interaction capabilities.
Rui Xu +11 more
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Asymptotic expansion of large eigenvalues for a class of unbounded Jacobi matrices [PDF]
Opuscula Mathematica, 2020 We investigate a class of infinite tridiagonal matrices which define unbounded self-adjoint operators with discrete spectrum. Our purpose is to establish the asymptotic expansion of large eigenvalues and to compute two correction terms explicitly.
Ayoub Harrat +2 more
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Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective
Advanced Electronic Materials, EarlyView.Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe +4 more
wiley +1 more source
Comments on new iterative methods for solving linear systems
上海师范大学学报. 自然科学版, 2017 Some new iterative methods were presented by Du, Zheng and Wang for solving linear systems in [3], where it is shown that the new methods, comparing to the classical Jacobi or Gauss-Seidel method, can be applied to more systems and have faster ...
Wang Ke, Tan Lijun, Wang Shiheng
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Four-body bound states in momentum space: the Yakubovsky approach without two-body t − matrices
Frontiers in Physics, 2023 This study presents a solution to the Yakubovsky equations for four-body bound states in momentum space, bypassing the common use of two-body t − matrices.
M. Mohammadzadeh +4 more
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Contributions to Plasma Physics, EarlyView.ABSTRACT Ab initio path integral Monte Carlo (PIMC) simulations constitute the gold standard for the estimation of a broad range of equilibrium properties of a host of interacting quantum many‐body systems spanning a broad range of conditions from ultracold atoms to warm dense quantum plasmas.
Paul Hamann +2 more
wiley +1 more source
Condicionamiento y alta precisión en problemas espectrales estructurados [PDF]
, 2007 Esta memoria trata dos aspectos relacionados con la precisión de algoritmos espectrales para problemas matriciales estructurados: 1) Se definen números de condición estructurados de autovalores múltiples, eventualmente defectivos, y se obtienen fórmulas ...
Peláez Montalvo, María José
core
IEEE Access, 2020 Multimode/multicore fibers are expected to provide an attractive solution to overcome the capacity limit of the current optical communication system. In the presence of strong crosstalk between modes and/or cores, the squared singular values of the input/
Amor Nafkha, Nizar Demni
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An Inverse Eigenvalue Problem for Jacobi Matrices [PDF]
Mathematical Problems in Engineering, 2011 A kind of inverse eigenvalue problem is proposed which is the reconstruction of a Jacobi matrix by given four or five eigenvalues and corresponding eigenvectors. The solvability of the problem is discussed, and some sufficient conditions for existence of the solution of this problem are proposed.
Wang, Zhengsheng, Zhong, Baojiang
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