Results 61 to 70 of about 2,339 (216)
Accelerating Conjugate Gradient Solvers for Homogenization Problems With Unitary Neural Operators
International Journal for Numerical Methods in Engineering, Volume 127, Issue 5, 15 March 2026.ABSTRACT Rapid and reliable solvers for parametric partial differential equations (PDEs) are needed in many scientific and engineering disciplines. For example, there is a growing demand for composites and architected materials with heterogeneous microstructures.
Julius Herb, Felix Fritzen
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Equalities and Inequalities for Norms of Block Imaginary Circulant Operator Matrices
Abstract and Applied Analysis, 2015 Circulant, block circulant-type matrices and operator norms have become effective tools in solving networked systems. In this paper, the block imaginary circulant operator matrices are discussed.
Xiaoyu Jiang, Kicheon Hong
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Toeplitz and Circulant Matrices: A Review [PDF]
Foundations and Trends® in Communications and Information Theory, 2006 [ t 0 t − 1 t − 2 ⋯ t − ( n − 1 ) t 1 t 0 t − 1 t 2 t 1 t 0 ⋮ ⋮ ⋱ t n − 1 ⋯ t 0 ] The fundamental theorems on the asymptotic behavior of eigenvalues, inverses, and products of banded Toeplitz matrices and Toeplitz matrices with absolutely summable elements are derived in a tutorial manner.
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Definition and Computation of Tensor‐Based Generalized Function Composition
Numerical Linear Algebra with Applications, Volume 33, Issue 1, February 2026.ABSTRACT Functions are fundamental to mathematics as they offer a structured and analytical framework to express relations between variables. While scalar and matrix‐based functions are well‐established, higher‐order tensor‐based functions have not been as extensively explored.
Remy Boyer
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Direct Adaption Methods for Linear and Circular Antenna Arrays
Известия высших учебных заведений России: Радиоэлектроника, 2023 Introduction. The mitigation of interferences that degrade the performance of navigation systems constitutes one of the most significant problems of contemporary satellite navigation.
Ye. I. Glushankov, V. I. Tsarik
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Invertibility of circulant matrices of arbitrary size
, 2022 In this paper, we present sufficient conditions to guarantee the invertibility of rational circulant matrices with any given size. These sufficient conditions consist of linear combinations of the entries in the first row with integer coefficients.
Jeong-Ok Choi +2 more
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Inversion of circulant matrices over 𝐙ₘ [PDF]
Mathematics of Computation, 1998 In this paper we consider the problem of inverting an n × n
BINI, DARIO ANDREA +3 more
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Range–Doppler Estimation With an EM‐Learned Prior for Pulse‐Agile Waveforms
Electronics Letters, Volume 62, Issue 1, January/December 2026.This letter proposes an expectation–maximisation (EM)‐based range–Doppler (RD) estimator that adaptively learns the clutter and target distributions and adjusts an RD prior map. By optimising the shrinkage strength via prior weighting, the proposed method improves RSM suppression in the region of interest.
Xiaojian Xu +3 more
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Determinants of Tridiagonal and Circulant Matrices Special Form by Chebyshev Polynomials
JTAM (Jurnal Teori dan Aplikasi Matematika)Along with the development of science, many researchers have found new methods to determine the determinant of a matrix of more than three orders.
Nurliantika Nurliantika +2 more
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Determinants of binomial-related circulant matrices
Special Matrices, 2018 Due to their rich algebraic structures and wide applications, circulant matrices have been of interest and continuously studied. In this paper, n×n complex left and right circulant matrices whose first row consists of the coefficients in the expansion of
Jantaramas Trairat +2 more
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