Results 51 to 60 of about 26,813 (231)
Special Matrices, 2020 In this paper, our main attention is paid to calculate the determinants and inverses of two types Toeplitz and Hankel tridiagonal matrices with perturbed columns.
Fu Yaru +3 more
doaj +1 more source
Unbounded Hankel operators and moment problems
, 2019 We find simple conditions for a non-negative Hankel quadratic form to be closable. Under some mild a priori assumption on the associated moments these sufficient conditions turn out to be also necessary.
Yafaev, D. R.
core +1 more source
On the solvability of the indefinite Hamburger moment problem
AIMS Mathematics, 2023 In this paper, we present a new approach for the solvability of the indefinite Hamburger moment problem in the class of generalized Nevanlinna functions with a given negative index, which is more algebraic and completely different from the existing ...
Yongjian Hu, Huifeng Hao , Xuzhou Zhan
doaj +1 more source
On the Determinant of a Certain Wiener-Hopf + Hankel Operator
, 2003 We establish an asymptotic formula for determinants of truncated Wiener-Hopf+Hankel operators with symbol equal to the exponential of a constant times the characteristic function of an interval.
Basor, Estelle L. +2 more
core +2 more sources
Multichannel Hankel Matrix Completion Through Nonconvex Optimization
IEEE Journal of Selected Topics in Signal Processing, 2018 This paper studies the multichannel missing data recovery problem when the measurements are generated by a dynamical system. A new model, termed multichannel low-rank Hankel matrices, is proposed to characterize the intrinsic low-dimensional structures in multichannel time series.
Shuai Zhang +3 more
openaire +1 more source
Photonics of Topological Magnetic Textures
Advanced Optical Materials, EarlyView.Localized noncollinear magetic textures imprint their geometry and topology onto traversing photonic fields endowing them with orbital angular‐momentum, chirality, and magnetoelectric densities. Abstract Topological textures in magnetically ordered materials are an important case studies for fundamental research with promising applications in data ...
Vakhtang Jandieri +6 more
wiley +1 more source
Enhanced Root-MUSIC Algorithm Based on Matrix Reconstruction for Frequency Estimation
Sensors, 2023 In recent years, frequency-modulated continuous wave (FMCW) radar has been widely used in automatic driving, settlement monitoring and other fields. The range accuracy is determined by the estimation of the signal beat frequency.
Yingjie Zhu +3 more
doaj +1 more source
The Hurwitz-type theorem for the regular Coulomb wave function via Hankel determinants
, 2018 We derive a closed formula for the determinant of the Hankel matrix whose entries are given by sums of negative powers of the zeros of the regular Coulomb wave function.
Baricz, Árpád, Štampach, František
core +1 more source
The Lanczos algorithm and Hankel matrix factorization
Linear Algebra and its Applications, 1992 The connection between the Lanczos algorithm for matrix tridiagonalization and fast algorithms for Hankel matrix factorization is studied. For this reason the Lanczos method for nonsymmetric matrices is discussed. Most Toeplitz solvers are based on the shift invariance of a Toeplitz matrix, and the authors note that many recursion formulae (although ...
Boley, Daniel L. +2 more
openaire +2 more sources
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