Results 21 to 30 of about 5,577 (256)
Application of Extended Euclid Algorithm on Hill Cipher Cryptography Modulo 95
Titian Ilmu: Jurnal Ilmiah Multi Sciences, 2023 Hill Cipher Cryptography is the art of hiding a message using an invertible matrix as the key. Let A be a 2 2 invertible matrix of the real number. Encryption performed by converting each character on the original message into an ASCII code.
Annisa +3 more
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Diagonal dominance and invertibility of matrices
Special Matrices, 2023 A weakly diagonally dominant matrix may or may not be invertible. We characterize, in terms of combinatorial structure and sign pattern when such a matrix is invertible, which is the common case. Examples are given.
Johnson Charles Royal +2 more
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A unified approach for covariance matrix estimation under Stein loss
Comptes Rendus. Mathématique, 2022 In this paper, we address the problem of estimating a covariance matrix of a multivariate Gaussian distribution, from a decision theoretic point of view, relative to a Stein type loss function.
Haddouche, Anis M., Lu, Wei
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A New Algorithm for Privacy-Preserving Horizontally Partitioned Linear Programs
Journal of Mathematics, 2021 In a linear programming for horizontally partitioned data, the equality constraint matrix is divided into groups of rows. Each group of the matrix rows and the corresponding right-hand side vector are owned by different entities, and these entities are ...
Chengxue Zhang +3 more
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Gait Analysis for a Tiltrotor: The Dynamic Invertible Gait
Robotics, 2022 A conventional feedback-linearization-based controller, when applied to a tiltrotor (eight inputs), results in extensive changes in tilting angles, which are not expected in practice. To solve this problem, we introduce the novel concept of “UAV gait” to
Zhe Shen, Takeshi Tsuchiya
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On the Inverting of a General Heptadiagonal Matrix [PDF]
British Journal of Applied Science & Technology, 2016 In this paper, we developed new numeric and symbolic algorithms to find the inverse of any nonsingular heptadiagonal matrix. Symbolic algorithm will not break and it is without setting any restrictive conditions. The computational cost of our algorithms is $O(n)$.
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Finding Bit-Based Division Property for Ciphers with Complex Linear Layers
IACR Transactions on Symmetric Cryptology, 2020 The bit-based division property (BDP) is the most effective technique for finding integral characteristics of symmetric ciphers. Recently, automatic search tools have become one of the most popular approaches to evaluating the security of designs against
Kai Hu, Qingju Wang, Meiqin Wang
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An analogue of Serre’s conjecture for a ring of distributions
Topological Algebra and its Applications, 2020 The set 𝒜 := δ0+ 𝒟+′, obtained by attaching the identity δ0 to the set 𝒟+′ of all distributions on with support contained in (0, ∞), forms an algebra with the operations of addition, convolution, multiplication by complex scalars.
Sasane Amol
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Estimating Forward-Looking Stock Correlations from Risk Factors
Mathematics, 2022 This study provides fully mathematically and economically feasible solutions to estimating implied correlation matrices in equity markets. Factor analysis is combined with option data to receive ex ante beliefs for cross-sectional correlations. Necessary
Wolfgang Schadner, Joshua Traut
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A deterministic algorithm for inverting a polynomial matrix
Journal of Complexity, 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wei Zhou 0029 +2 more
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