Results 101 to 110 of about 2,726,393 (218)
Relativity and Hadamard products
, 2023 A key feature of Hadamard products is used to simplify relativistic matrix derivations.
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Penalized Convex Estimation in Dynamic Location Models
Journal of Time Series Analysis, EarlyView.ABSTRACT This paper studies L1$$ {L}^1 $$‐penalized estimation for location models yt=mt+ϵt$$ {y}_t={m}_t+{\epsilon}_t $$, where mt$$ {m}_t $$ is defined by a possibly non‐Markovian recursion and ϵt$$ {\epsilon}_t $$ is a martingale difference sequence with possibly time‐varying conditional variance.
Reda Alami Chentoufi
wiley +1 more source
Hadamard Products of Stable Polynomials Are Stable
Journal of Mathematical Analysis and Applications, 1996 A real polynomial is said to be (Hurwitz or asymptotically) stable if all its zeros lie in the open left half of the complex plane. The authors show that the Hadamard coefficientwise product of two stable polynomials is again stable, improving upon some known results.
Garloff, Jürgen, Wagner, David G.
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Optimal Portfolio Choice With Cross‐Impact Propagators
Mathematical Finance, EarlyView.ABSTRACT We consider a class of optimal portfolio choice problems in continuous time where the agent's transactions create both transient cross‐impact driven by a matrix‐valued Volterra propagator, as well as temporary price impact. We formulate this problem as the maximization of a revenue‐risk functional, where the agent also exploits available ...
Eduardo Abi Jaber +2 more
wiley +1 more source
Univalent functions defined by Ruscheweyh derivatives
International Journal of Mathematics and Mathematical Sciences, 1983 We study some radii problems concerning the integral operator F(z)=γ+1zγ∫°zuγ−1f(u)du for certain classes, namely Kn and Mn(α), of univalent functions defined by Ruscheweyh derivatives. Infact, we obtain the converse of Ruscheweyh's result and improve
S. L. Shukla, Vinod Kumar
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Design Principles for Light‐Scattering Reservoir Computing at the Edge of Chaos
Advanced Computing, Volume 1, Issue 1, December 2026.Here we realize a light‐scattering reservoir computer operating with measurement‐modulation feedback, physically tunable in three axes—reservoir dynamics, input‐reservoir coupling, and reservoir interconnectivity. Sweeping each axis, we locate the axis‐specific optimum of memory capacity; the dynamic axis displays the sharpest optimum.
Geon Kim, YongKeun Park
wiley +1 more source
Hadamard products and BPS networks
Journal of High Energy PhysicsWe study examples of fourth-order Picard-Fuchs operators that are Hadamard products of two second-order Picard-Fuchs operators. Each second-order Picard-Fuchs operator is associated with a family of elliptic curves, and the Hadamard product computes ...
Mohamed Elmi
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Generalizations of p-valent functions via the hadamard product
International Journal of Mathematics and Mathematical Sciences, 1982 The classes of univalent prestarlike functions Rα, α≥−1, of Ruscheweyh [1] and a certain generalization of Rα were studied recently by Al-Amiri [2]. The author studies, among other things, the classes of p-valent functions R(α+p−1) where p is a positive ...
Anil K. Soni
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On the Generalization of a Class of Harmonic Univalent Functions Defined by Differential Operator
Mathematics, 2018 In this article, a new class of harmonic univalent functions, defined by the differential operator, is introduced. Some geometric properties, like, coefficient estimates, extreme points, convex combination and convolution (Hadamard product) are obtained.
Aqeel Ketab AL-khafaji +2 more
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Application of Hadamard product to some combinatorial and probabilistic problems
, 2017 An improvement of the algebraic method of computing the Hadamard product of rational functions is given. Some applications of the Hadamard product to combinatorial and probabilistic problems are considered.
Elena A. Potekhina
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