Results 31 to 40 of about 5,774,152 (370)
Strictly Positive Definite Kernels on a Product of Spheres II [PDF]
, 2016 We present, among other things, a necessary and sufficient condition for the strict positive definiteness of an isotropic and positive definite kernel on the cartesian product of a circle and a higher dimensional sphere.
Guella, Jean C. +2 more
core +1 more source
Propagation of regularity and positive definiteness: a constructive approach [PDF]
, 2018 We show that, for positive definite kernels, if specific forms of regularity (continuity, Sn-differentiability or holomorphy) hold locally on the diagonal, then they must hold globally on the whole domain of positive-definiteness.
J. Buescu, A. Paixao, C. Oliveira
semanticscholar +1 more source
On positive definiteness over locally compact quantum groups [PDF]
, 2015 The notion of positive-definite functions over locally compact quantum groups was recently introduced and studied by Daws and Salmi. Based on this work, we generalize various well-known results about positive-definite functions over groups to the quantum
Runde, Volker, Viselter, Ami
core +1 more source
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
doaj +1 more source
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
doaj +1 more source
Geometric conditions for the positive definiteness of the second variation in one-dimensional problems [PDF]
, 2016 Given a functional for a one-dimensional physical system, a classical problem is to minimize it by finding stationary solutions and then checking the positive definiteness of the second variation.
T. Lessinnes, A. Goriely
semanticscholar +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Classification of positive definite lattices [PDF]
Duke Mathematical Journal, 2000 35 pages, plain ...
openaire +4 more sources