Results 31 to 40 of about 562,872 (260)
On some p-almost Hadamard matrices
Operators and Matrices, 2019 Let M(n,R) be the space of all real valued n× n matrices and O(n,R) be the orthogonal group. A square matrix Hn ∈ M(n,R) is called “almost Hadamard” if Un := Hn/ √ n is orthogonal, and locally maximizes the 1-norm on O(n,R) . The matrix Hn is “ p -almost
M. T. Mohan
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Symmetric Hadamard Matrices of Orders 268, 412, 436 and 604 [PDF]
Information and Control Systems, 2018 Purpose.To investigate more fully, than what was done in the past, certain families of symmetric Hadamard matrices of small orders by using the so called propus construction.Methods.Orbit method for the search of three cyclic blocks to construct Hadamard
N. A. Balonin, D. ¯Dokovi´c
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On Some Matrix Trace Inequalities
Journal of Inequalities and Applications, 2010 We first present an inequality for the Frobenius norm of the Hadamard product of two any square matrices and positive semidefinite matrices. Then, we obtain a trace inequality for products of two positive semidefinite block matrices by using 2×2 ...
Ramazan Türkmen +1 more
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Complex Hadamard Matrices contained in a Bose–Mesner algebra
Special Matrices, 2015 Acomplex Hadamard matrix is a square matrix H with complex entries of absolute value 1 satisfying HH* = nI, where * stands for the Hermitian transpose and I is the identity matrix of order n.
Ikuta Takuya, Munemasa Akihiro
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Generating binary partial Hadamard matrices
Discrete Applied Mathematics, 2019 This paper deals with partial binary Hadamard matrices. Although there is a fast simple way to generate about a half (which is the best asymptotic bound known so far, see de Launey (2000) and de Launey and Gordon (2001)) of a full Hadamard matrix, it ...
V. Álvarez +6 more
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Applications of Hadamard matrices
Journal of Telecommunications and Information Technology, 2003 We present a number of applications of Hadamard matrices to signal processing, optical multiplexing, error correction coding, and design and analysis of statistics.
Haralambos Evangelaras +2 more
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Green Matrices, Minors and Hadamard Products
Axioms, 2023 Green matrices are interpreted as discrete version of Green functions and are used when working with inhomogeneous linear system of differential equations.
Jorge Delgado +2 more
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Kochen-Specker sets and Hadamard matrices [PDF]
Theoretical Computer Science, 2016 We introduce a new class of complex Hadamard matrices which have not been studied previously. We use these matrices to construct a new infinite family of parity proofs of the Kochen-Specker theorem.
P. Lisoněk
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Construction of Sylvester-Hadamard Matrices by Using Binary Code [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2009 A simple method is presented which defines Sylvester-Hadamard matrices in terms of products of binary code. This method is based representation of natural number as binary code which take only two value 0 or 1.
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Journal of Combinatorial Theory, Series A, 1971 AbstractIf X is a symmetric Hadamard matrix, Y is a skew-Hadamard matrix, and XYT is symmetric, then X and Y are said to be amicable Hadamard matrices. A construction for amicable Hadamard matrices is given, and then amicable Hadamard matrices are used to generalize a construction for skew-Hadamard matrices.
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