Results 21 to 30 of about 168,117,835 (293)

Zeros of systems of 𝔭-adic quadratic forms [PDF]

Compositio Mathematica, 2010
Abstract We show that a system of r quadratic forms over a 𝔭-adic field in at least 4 r +1 variables will have a non-trivial zero as soon as the cardinality of the residue field is large enough.
openaire   +5 more sources

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, Vladimir Krutikov, Predrag Stanimirović, Vladimir Meshechkin, Aleksey Popov, Lev Kazakovtsev   +5 more
doaj   +1 more source

Classes of weak Dembowski–Ostrom polynomials for multivariate quadratic cryptosystems

Journal of Mathematical Cryptology, 2015
T. Harayama and D. K. Friesen [J. Math. Cryptol. 1 (2007), 79–104] proposed the linearized binomial attack for multivariate quadratic cryptosystems and introduced weak Dembowski–Ostrom (DO) polynomials in this framework over the finite field 𝔽2.
Alam Bilal, Özbudak Ferruh, Yayla Oğuz
doaj   +1 more source

Application of the Quasilinearization Method to Approximate Non-linear Delay Differential Equations in Physical Problems [PDF]

Sahand Communications in Mathematical Analysis
This paper investigates the application of the Quasilinearization Method (QLM) for approximating non-linear delay differential equations (DDEs), which are prevalent in fields such as control systems and population dynamics.
Fateme Sheikhi, Bahman Ghazanfari
doaj   +1 more source

Geometry and integrability of quadratic systems with invariant hyperbolas

Electronic Journal of Qualitative Theory of Differential Equations, 2021
Let QSH be the family of non-degenerate planar quadratic differential systems possessing an invariant hyperbola. We study this class from the viewpoint of integrability.
Regilene Oliveira, Dana Schlomiuk, Ana Maria Travaglini   +2 more
doaj   +1 more source

Pfister's local–global principle and systems of quadratic forms [PDF]

Bulletin of the London Mathematical Society, 2020
16 pages; comments are ...
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Conserved- and zero-mean quadratic quantities in oscillatory systems

, 2005
We study quadratic functionals of the variables of a linear oscillatory system and their derivatives. We show that such functionals are partitioned in conserved quantities and in trivially- and intrinsic zero-mean quantities.
Willems, Jan C., Rapisarda, Paolo
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Statistical Machine Learning Model for Uncertainty Planning of Distributed Renewable Energy Sources in Distribution Networks

Frontiers in Energy Research, 2021
New energy power systems with high-permeability photovoltaic and wind power are high-dimensional dynamic large-scale systems with nonlinear, uncertain and complex operating characteristics.
Xueqian Fu, Xianping Wu, Nian Liu
doaj   +1 more source

Quadratic forms and systems of forms in many variables [PDF]

Inventiones mathematicae, 2018
29 pages, in ...
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Models for Quadratic Algebras Associated with Second Order Superintegrable Systems in 2D [PDF]

, 2008
There are 13 equivalence classes of 2D second order quantum and classical superintegrable systems with nontrivial potential, each associated with a quadratic algebra of hidden symmetries.
Willard Miller Jr., Kalnins, Ernie G., Miller, W., Jr., Sarah Post, Post, Sarah, Ernest G. Kalnins   +5 more
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