Results 21 to 30 of about 59,248 (235)
Negative volatility spillovers in the unrestricted ECCC-GARCH model [PDF]
, 2009 Copyright @ 2010 Cambridge University Press.This paper considers a formulation of the extended constant or time-varying conditional correlation GARCH model that allows for volatility feedback of either the positive or negative sign.
Conrad, C, Karanasos, M
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Positive Definite Operator Sequences [PDF]
Proceedings of the American Mathematical Society, 1994 An example is given of a linear mapping from C [ x ] {\mathbf {C}}[x] to M 2 ( C ) {{\mathbf {
openaire +2 more sources
Mathematics, 2023 This paper is devoted to the spectral analysis of one class of integral operators, associated with the boundary-value problems for differential equations of fractional order.
Tatiana Matseevich, Temirkhan Aleroev
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New Sufficient Condition for the Positive Definiteness of Fourth Order Tensors
Mathematics, 2018 In this paper, we give a new Z-eigenvalue localization set for Z-eigenvalues of structured fourth order tensors. As applications, a sharper upper bound for the Z-spectral radius of weakly symmetric nonnegative fourth order tensors is obtained and a new Z-
Jun He +3 more
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Real wave propagation in the isotropic relaxed micromorphic model [PDF]
, 2016 For the recently introduced isotropic relaxed micromorphic generalized continuum model, we show that under the assumption of positive definite energy, planar harmonic waves have real velocity.
Abreu, Rafael +5 more
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Многоязычие в образовательном пространстве, 2021 The purpose of this study is to conduct a comparative typological analysis of the means of expressing the category “Definiteness / Indefiniteness” in German, Tatar and Russian languages and, building on this analysis, to develop a system of exercises ...
A. A. Sibgatullina
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Using stability analysis of discrete elastic systems to study the buckling of nanostructures
Archives of Mechanics, 2012 Stubility/instability criteria of discrete elastic systems are used to study the buckling of nanostructures. The deformation of nanostructures is simulated by solving the nonlinear equations of molecular mechanics.
S.N. Korobeynikov +3 more
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Intelligent optimization based density matrix reconstruction method with semi-positive constraint
Results in Physics, 2023 Quantum state tomography (QST) is a technique used to reconstruct the density matrix of unknown quantum states based on experimentally obtained measurements. QST is a fundamental tool in the field of quantum information and quantum technology.
Xiaomin Meng +3 more
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Remedies for Misapplications of Sylvester’s Criterion: A Pedagogic Illustration
Spreadsheets in Education, 2021 Sylvester’s criterion, which verifies the positive definiteness of any real symmetric matrix by examining the signs of all leading principal minors, is an excellent analytical tool.
Clarence C.Y. Kwan
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Positive Semidefiniteness and Positive Definiteness of a Linear Parametric Interval Matrix
, 2017 We consider a symmetric matrix, the entries of which depend linearly on some parameters. The domains of the parameters are compact real intervals. We investigate the problem of checking whether for each (or some) setting of the parameters, the matrix is ...
A Neumaier +30 more
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