Results 1 to 10 of about 187,051,808 (157)
The inverse eigenvalue problem for a Hermitian reflexive matrix and the optimization problem [PDF]
Journal of Computational and Applied Mathematics, 2016 The inverse eigenvalue problem and the associated optimal approximation problem for Hermitian reflexive matrices with respect to a normal {k+1}-potent matrix are considered. First, we study the existence of the solutions of the associated inverse eigenvalue problem and present an explicit form for them.
Nestor Thome
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Forward Order Law for the Reflexive Inner Inverse of Multiple Matrix Products
Axioms, 2022 The generalized inverse has numerous important applications in aspects of the theoretic research of matrices and statistics. One of the core problems of generalized inverse is finding the necessary and sufficient conditions for the reverse (or the forward) order laws for the generalized inverse of matrix products.
Zhiping Xiong
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On the mean and variance of the estimated tangency portfolio weights for small samples
Modern Stochastics: Theory and Applications, 2022 In this paper, a sample estimator of the tangency portfolio (TP) weights is considered. The focus is on the situation where the number of observations is smaller than the number of assets in the portfolio and the returns are i.i.d.
Gustav Alfelt, Stepan Mazur
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Open Journal of Mathematical Optimization, 2021 The M-P (Moore–Penrose) pseudoinverse has as a key application the computation of least-squares solutions of inconsistent systems of linear equations. Irrespective of whether a given input matrix is sparse, its M-P pseudoinverse can be dense, potentially
Fampa, Marcia, Lee, Jon, Ponte, Gabriel
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Efficient GMM estimation with singular system of moment conditions
Statistical Theory and Related Fields, 2020 Standard generalised method of moments (GMM) estimation was developed for nonsingular system of moment conditions. However, many important economic models are characterised by singular system of moment conditions.
Zhiguo Xiao
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Linear Algebra and its Applications, 1992 L'objet du papier est d'établir, en utilisant une approche géométrique, les liens qui existent entre les corrélations canoniques de deux vecteurs aléatoires suivant qu'ils sont obtenus soit à partir de la matrice des covariances, soit á partir d'une inverse généralisée réflexive symétrique de cette matrice.
Baksalary, Jerzy K. +2 more
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Generating Self-Invertible Matrices by Hill Cipher Algorithm In Gaussian Integers
Academic Science JournalIn this paper, the Creating self-reflexive matrices for the Hill Cipher algorithm in Gaussian integers is discussed. It's not always possible to find the inverse of the matrix that was used to encrypt the plaintext.
Ayat A. Jafaar, Rifaat Z. Khalaf
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The Ordered Rectangular Band of Reflexive Generalized Inverses of a Matrix
Mathematics LettersThis article studies the algebraic structure of the set of all reflexive generalized inverses of a real matrix using a sandwich-type binary operation and examines the compatibility of certain matrix order relations with this operation. The concept of generalized inverses arises when dealing with singular or rectangular matrices, where a standard ...
Sathi H, P. Romeo
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Linear Algebra and its Applications, 1975 AbstractNeumann-type series expansion of reflexive generalized inverses of a matrix is investigated, and [dota] necessary and sufficient condition is given in relation to the expansion for the convergence of the hyperpower iterative method for generating reflexive generalized inverses.
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On the conjugate weight function and ultradifferentiable classes of entire functions. [PDF]
Adv Oper TheorySchindl G.
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