Results 21 to 30 of about 4,257 (300)

On Positive Definite Kernels of Integral Operators Corresponding to the Boundary Value Problems for Fractional Differential Equations

Entropy, 2022
In the spectral analysis of operators associated with Sturm–Liouville-type boundary value problems for fractional differential equations, the problem of positive definiteness or the problem of Hermitian nonnegativity of the corresponding kernels plays an
Mukhamed Aleroev, Temirkhan Aleroev
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New criteria-based ℋ-tensors for identifying the positive definiteness of multivariate homogeneous forms

Open Mathematics, 2021
Positive definite polynomials are important in the field of optimization. ℋ-tensors play an important role in identifing the positive definiteness of an even-order homogeneous multivariate form.
Sun Deshu, Bai Dongjian
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V-singular values of rectangular tensors and their applications

Journal of Inequalities and Applications, 2019
The positive definiteness of rectangular tensors has wide applications in solid mechanics and quantum physics. By modifying the existing definition of singular value for rectangular tensors, some V-singular value inclusion sets for rectangular tensors ...
Jun He, Yanmin Liu, Guangjun Xu, Gang Liu   +3 more
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Nonsingularity, positive definiteness, and positive invertibility under fixed-point data rounding [PDF]

, 2007
summary:For a real square matrix $A$ and an integer $d\ge 0$, let $A_{(d)}$ denote the matrix formed from $A$ by rounding off all its coefficients to $d$ decimal places.
Rohn, Jiří
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Strict positive definiteness in geostatistics [PDF]

, 2017
Geostatistical modeling is often based on the use of covariance functions, i.e., positive definite functions. However, when interpolation problems have to be solved, it is advisable to consider the subset of strictly positive definite functions. Indeed,
POSA, Donato, DE IACO, Sandra, S. De Iaco, D. Posa   +3 more
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Strict positive definiteness on spheres via disk polynomials

International Journal of Mathematics and Mathematical Sciences, 2002
We characterize complex strictly positive definite functions on spheres in two cases, the unit sphere of ℂq, q≥3, and the unit sphere of the complex ℓ2. The results depend upon the Fourier-like expansion of the functions in terms of disk polynomials and,
V. A. Menegatto, A. P. Peron
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Predicative definite NPIs in Norwegian

Nordlyd: Tromsø University Working Papers on Language & Linguistics, 2011
In Norwegian, a weak quantifier or a scalar adjective with a positive value may combine with a definite noun and thereby form an attenuating NPI. These phrases, which I call predicative definite NPIs, are exceptional as nominal phrases, since they do not
Marit Julien
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Positive definite indistinguishability operators [PDF]

Fuzzy Sets and Systems, 2020
Peer ...
Recasens Ferrés, Jorge, Tomás Belenguer, María Santos   +1 more
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Spectral Analysis of One Class of Positive-Definite Operators and Their Application in Fractional Calculus

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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WAYS OF EXPRESSING THE CATEGORY “DEFINITENESS – INDEFINITENESS” IN RUSSIAN, TATAR AND GERMAN LANGUAGES (COMPARATIVE ASPECT)

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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