Results 11 to 20 of about 306,107 (293)
Advances in Wishart-Type Modelling of Channel Capacity
Revstat Statistical Journal, 2020 This paper paves the way when the assumption of normality is challenged within the wireless communications systems arena. Innovative results pertaining to the distributions of quadratic forms and their associated eigenvalue density functions for the ...
J.T. Ferreira , A. Bekker , M. Arashi
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Regularity of Linear Systems of Differential Equations on the Axes and Pencils of Quadratic Forms
Communications in Advanced Mathematical Sciences, 2019 It is considered linear systems of differential equations and investigated questions of regularity of these systems. To explore the regularity it is comfortable to use quadratic form whose derivative with respect to the adjoint system is positive ...
Nataliya Stepanenko +2 more
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The Role of Pre-Commitments and Engle Curves in Thailand’s Aggregate Energy Demand System
Energies, 2022 In the present paper, an investigation into Thailand’s energy demand is performed to determine if: (1) a linear or nonlinear Engel curve better explains the relationship between income and energy consumption, and (2) systems with pre-commitments better ...
Kannika Duangnate, James W. Mjelde
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Zeros of systems of 𝔭-adic quadratic forms [PDF]
Compositio Mathematica, 2010 AbstractWe show that a system of r quadratic forms over a 𝔭-adic field in at least 4r+1 variables will have a non-trivial zero as soon as the cardinality of the residue field is large enough. In contrast, the Ax–Kochen theorem [J. Ax and S. Kochen, Diophantine problems over local fields. I, Amer. J. Math. 87 (1965), 605–630] requires the characteristic
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New aspects of two Hessian-Riemannian metrics in plane [PDF]
Surveys in Mathematics and its Applications, 2020 Due to the importance of Hessian structures we express some algebraic and geo\-me\-tric features of two such semi-Riemannian metrics in dimension two. For this purpose we use the separable coordinate systems of the Euclidean plane. Several properties are
Mircea Crâșmăreanu
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Entropy, 2021 A product form design and evaluation model are proposed. In this method, the forms can be evaluated by three sub-evaluation models which can help designers to grasp consumers’ preferences.
Peng Lu, Shih-Wen Hsiao, Fan Wu
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Contractions of Degenerate Quadratic Algebras, Abstract and Geometric [PDF]
, 2017 Quadratic algebras are generalizations of Lie algebras which include the symmetry algebras of 2nd order superintegrable systems in 2 dimensions as special cases.
Miller Jr., Willard +2 more
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Modeling Ivory Coast COVID-19 cases: Identification of a high-performance model for utilization
Results in Physics, 2021 This study modelled the reported daily cumulative confirmed, discharged and death Coronavirus disease 2019 (COVID-19) cases using six econometric models in simple, quadratic, cubic and quartic forms and an autoregressive integrated moving average (ARIMA)
Ugochinyere Ihuoma Nwosu +1 more
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Synthesis of dissipative systems using quadratic differential forms: Part I [PDF]
IEEE Transactions on Automatic Control, 2002 In this second part of this paper, we discuss several important special cases of the problem solved in Part I. These are: disturbance attenuation and passivation, the full information case, the filtering problem, and the case that the to-be-controlled plant is given in input–state–output representation.
Trentelman, H.L., Willems, Jan C.
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A Family of Multi-Step Subgradient Minimization Methods
Mathematics, 2023 For solving non-smooth multidimensional optimization problems, we present a family of relaxation subgradient methods (RSMs) with a built-in algorithm for finding the descent direction that forms an acute angle with all subgradients in the neighborhood of
Elena Tovbis +5 more
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