Search Results - Block structures with rectangular Toeplitz blocks~

Block structures, g.a.c.s. approximation, and distributions: Block structures, g.a.c.s. approximation, and distributions by Adriani, Andrea, Schiavoni-Piazza, Alec Jacopo Almo, Serra-Capizzano, Stefano

“…In the present note, we consider the problem of identifying the singular value and eigenvalue distribution in the Weyl sense of block matrix-sequences with rectangular Toeplitz blocks…”
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Three‐dimensional gravity forward modelling based on rectilinear grid and Block–Toeplitz Toeplitz–Block methods by Wan, Ling, Li, Shihe, Ye, Rui, Wang, Yifan, Ma, Zenghan, Lin, Tingting

“… We present a fast computational method for three‐dimensional gravity forward modelling of subsurface space using rectilinear grid and apply the Block–Toeplitz Toeplitz…”
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Block Circulant and Toeplitz Structures in the Linearized Hartree–Fock Equation on Finite Lattices: Tensor Approach by Khoromskaia, Venera, Khoromskij, Boris N.

“… In the periodic case, the Galerkin system matrix obeys a three-level block-circulant structure that allows the FFT-based diagonalization, while for the finite extended systems in a box…”
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Blocking structures, approximation, and preconditioning by Barakitis, Nikos, Donatelli, Marco, Ferri, Samuele, Loi, Valerio, Serra-Capizzano, Stefano, Sormani, Rosita Luisa

“…We consider block-structured matrices A n , where the blocks are of (block) unilevel Toeplitz type…”
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Efficient Analysis of Planar, Arbitrarily Shaped, and (Bi)-Anisotropic Metasurface Antennas by Cavillot, Jean, Bodehou, Modeste, Hubert, Simon, Craeye, Christophe

“… In the proposed method, the shaped MTS is included in a larger rectangular domain meshed with rooftop basis functions, resulting in a Toeplitz-block Toeplitz structure for the substrate impedance…”
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A fast covariance matrix reconstruction method for two-dimensional direction-of-arrival estimation by Xiaohuan Wu, Wei-Ping Zhu, Jun Yan

“… We first reconstruct the covariance matrix of the coarray with block-Toeplitz structure and then retrieve the DOAs…”
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OLRIV: a new fast adaptive algorithm for rectangular-block Toeplitz systems by Buzenac-Settineri, V., Najim, M.

“…In this paper, we propose a new algorithm for solving overdetermined systems when they are rectangular-block Toeplitz…”
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Cost‐efficient numerical algorithm for solving the linear inverse problem of finding a variable magnetization by Akimova, Elena N., Martyshko, Petr S., Misilov, Vladimir E., Miftakhov, Valeriy O.

“… is reduced to solving a system of linear algebraic equations with the Toeplitz‐block‐Toeplitz matrix. We have constructed the memory efficient variant of the stabilized biconjugate gradient method BiCGSTABmem…”
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A Korovkin-Based Approximation of Multilevel Toeplitz Matrices (with Rectangular Unstructured Blocks) via Multilevel Trigonometric Matrix Spaces by Capizzano, Stefano Serra

“…In this paper we are concerned with the approximation of multilevel Toeplitz matrices generated by multivariate rectangular matrix-valued continuous (also L2) functions f : Ip→ Cs x t, with I = [-π,π…”
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On the fast solution of Toeplitz-block linear systems arising in multivariate approximation theory by Becuwe, Stefan, Cuyt, Annie

“… approximant under consideration, leads to a Toeplitz-block linear system with coefficient matrix of low displacement rank…”
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Adaptive Target Detection and DOA Estimation With Uniform Rectangular Arrays in the Presence of Unknown Mutual Coupling by Lan, Lan, Rosamilia, Massimo, Aubry, Augusto, De Maio, Antonio, Liao, Guisheng

“… symmetric Toeplitz block Toeplitz structure for the coupling matrix description, a vectorial model…”
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Isotropy groups of the action of orthogonal congruence on Hermitian matrices by Starčič, Tadej

“… of *congruence on Hermitian matrices. A key ingredient in our proof is an algorithm giving solutions of a certain rectangular block (complex-alternating…”
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Block circulant and Toeplitz structures in the linearized Hartree-Fock equation on finite lattices: tensor approach by Khoromskaia, V, Khoromskij, B N

“… In the periodic case, the Galerkin system matrix obeys a three-level block-circulant structure that allows the FFT-based diagonalization, while for the finite extended systems in a box…”
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Isotropy groups of the action of orthogonal similarity on symmetric matrices by Starčič, Tadej

“… of similarity on complex symmetric matrices. A key step in our proof is to solve a certain rectangular block upper triangular Toeplitz matrix equation…”
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Gain and phase autocalibration for uniform rectangular arrays by Heidenreich, Philipp, Zoubir, Abdelhak M.

“… In this paper, we develop an autocalibration method for 2-D DOA estimation with a uniform rectangular array, in which we exploit a Toeplitz-block Toeplitz structure…”
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A matrix-theoretic spectral analysis of incompressible Navier–Stokes staggered DG approximations and a related spectrally based preconditioning approach by Mazza, M., Semplice, M., Serra-Capizzano, S., Travaglia, E.

“… They are of block type, each block showing Toeplitz-like, band, and tensor structure at the same time…”
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Procrustes problems and inverse eigenproblems for multilevel block [alpha]-circulants by Xu, Wei-Ru, Chen, Guoliang, Gong, Yi

“…)-level block matrices, where the first k levels have the block [alpha]i-circulant structure with orders n 1 ,n 2 ,...,n k…”
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A Korovkin-Based Approximation of MultilevelToeplitz Matrices (With Rectangular Unstructured Blocks) via Multilevel Trigonometric Matrix Spaces by Capizzano, Stefano Serra

“…In this paper we are concerned with the approximation of multilevel Toeplitz matrices generated by multivariate rectangular matrix-valued continuous (also L2) functions $f: I^p\rightarrow {\cal C}^{s\times t}$, with $I=[-\pi,\pi…”
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Accelerated methods for computing internal inductances of rectangular conductors by Schellenberg, T., Guang Xu, El-Arabied, M., Schneider, M.

“… Significant improvements in both the speed of computation and in memory requirements are achieved by applying algorithms that take advantage of the symmetric Toeplitz block Toeplitz structure…”
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Adaptive integral method combined with the loose GMRES algorithm for planar structures analysis by Zhuang, W., Fan, Z. H., Hu, Y. Q.

“… AIM could map these basis functions onto a rectangular grid, where the Toeplitz property of the Green's function would be utilized, which enables the calculation of the matrix…”
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