Results 21 to 30 of about 257,472 (285)

Spatial transport and spectral transfer of solar wind turbulence composed of Alfvén waves and convective structures I: The theoretical model [PDF]

open access: yesAnnales Geophysicae, 1995
In this paper we give a survey of detailed algebraic developments of a solar wind turbulence model. The numerical solution of the coupled system of spectral transfer equations for turbulence composed of Alfvén waves and convective structures or two ...
J. M. Schmidt, E. Marsch
doaj   +1 more source

Free W*-Dynamical Systems From p-Adic Number Fields and the Euler Totient Function

open access: yesMathematics, 2015
In this paper, we study relations between free probability on crossed product W * -algebras with a von Neumann algebra over p-adic number fields
Ilwoo Cho, Palle E. T. Jorgensen
doaj   +1 more source

Applying machine learning to the problem of choosing a heuristic to select the variable ordering for cylindrical algebraic decomposition [PDF]

open access: yes, 2014
Cylindrical algebraic decomposition(CAD) is a key tool in computational algebraic geometry, particularly for quantifier elimination over real-closed fields. When using CAD, there is often a choice for the ordering placed on the variables.
A. Dolzmann   +17 more
core   +5 more sources

Wave Transport and Localization in Prime Number Landscapes

open access: yesFrontiers in Physics, 2021
In this paper, we study the wave transport and localization properties of novel aperiodic structures that manifest the intrinsic complexity of prime number distributions in imaginary quadratic fields.
Luca Dal Negro   +4 more
doaj   +1 more source

Pattern-Multiplicative Average of Nonnegative Matrices: When a Constrained Minimization Problem Requires Versatile Optimization Tools

open access: yesMathematics, 2022
Given several nonnegative matrices with a single pattern of allocation among their zero/nonzero elements, the average matrix should have the same pattern as well.
Vladimir Yu. Protasov   +2 more
doaj   +1 more source

Classes of weak Dembowski–Ostrom polynomials for multivariate quadratic cryptosystems

open access: yesJournal 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

Analysis of Generalized Nonlinear Quadrature for Novel Fractional-Order Chaotic Systems Using Sinc Shape Function

open access: yesMathematics, 2023
This paper introduces the generalized fractional differential quadrature method, which is based on the generalized Caputo type and is used for the first time to solve nonlinear fractional differential equations.
Abdelfattah Mustafa   +2 more
doaj   +1 more source

Complete Algebraic Vector Fields on Danielewski Surfaces [PDF]

open access: yes, 2015
We give the classification of all complete algebraic vector fields on Danielewski surfaces (smooth surfaces given by $xy=p(z)$). We use the fact that for each such vector field there exists a certain fibration that is preserved under its flow.
Leuenberger, Matthias
core   +4 more sources

Integral D-Finite Functions

open access: yes, 2015
We propose a differential analog of the notion of integral closure of algebraic function fields. We present an algorithm for computing the integral closure of the algebra defined by a linear differential operator.
Bronstein Manuel   +4 more
core   +1 more source

Solutions of diophantine equations as periodic points of $p$-adic algebraic functions, III

open access: yes, 2020
All the periodic points of a certain algebraic function related to the Rogers-Ramanujan continued fraction $r(\tau)$ are determined. They turn out to be $0, \frac{-1 \pm \sqrt{5}}{2}$, and the conjugates over $\mathbb{Q}$ of the values $r(w_d/5)$, where $
Morton, Patrick
core   +1 more source

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