Results 21 to 30 of about 1,382,450 (317)

Second order homogenization of quasi-periodic structures

open access: yesVietnam Journal of Mechanics, 2018
The paper develops a general framework to derive the effective properties of quasi-periodic elastic medium. By using the asymptotic expansion method, the solution is expanded to the second order by solving a sequence of minimization problems.
Duc Trung Le, Jean-Jacques Marigo
doaj   +1 more source

PERIODIC AND ALMOST-PERIODIC SOLUTIONS OF RECURRENT MULTIPLICATIVE SECOND-ORDER EQUATIONS

open access: yesСовременная наука и инновации, 2022
Solutions of the recurrent multiplicative equation of a special kind are considered. The values of the parameters of the equation are defined, for which the solutions are periodic, almost periodic or combine properties of a geometric progression and ...
Victor Grigorievich Rudenko   +2 more
doaj  

Summation of divergent series and Borel summability for strongly dissipative equations with periodic or quasi-periodic forcing terms [PDF]

open access: yes, 2005
We consider a class of second order ordinary differential equations describing one-dimensional systems with a quasi-periodic analytic forcing term and in the presence of damping.
BARTUCCELLI M.V, DEANE, GENTILE G, J.H.B
core   +2 more sources

First order impulsive differential inclusions with periodic conditions

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2008
In this paper, we present an impulsive version of Filippov's Theorem for the first-order nonresonance impulsive differential inclusion $$ \begin{array}{rlll} y'(t)-\lambda y(t) &\in& F(t,y(t)), &\hbox{ a.e. } \, t\in J\backslash \{t_{1},\ldots,t_{m}\},\\
John Graef, Abdelghani Ouahab
doaj   +1 more source

Periodic solutions of second-order nonautonomous dynamical systems

open access: yesBoundary Value Problems, 2006
We study the existence of periodic solutions for second-order nonautonomous dynamical systems. We give four sets of hypotheses which guarantee the existence of solutions.
Schechter Martin
doaj   +2 more sources

On the orders of periodic diffeomorphisms of 4-manifolds [PDF]

open access: yesDuke Mathematical Journal, 2011
This paper initiated an investigation on the following question: Suppose a smooth 4-manifold does not admit any smooth circle actions. Does there exist a constant $C>0$ such that the manifold support no smooth $\Z_p$-actions of prime order for $p>C$?
openaire   +4 more sources

Gauss periods: orders and cryptographical applications [PDF]

open access: yesMathematics of Computation, 1998
Experimental results on the multiplicative orders of Gauss periods in finite fields are presented. These results indicate that Gauss periods have high order and are often primitive (self-dual) normal elements in finite fields. It is shown that Gauss periods can be exponentiated in quadratic time.
Joachim von zur Gathen   +2 more
openaire   +2 more sources

Periodic solutions of second order Hamiltonian systems bifurcating from infinity [PDF]

open access: yes, 2006
The goal of this article is to study closed connected sets of periodic solutions, of autonomous second order Hamiltonian systems, emanating from infinity. The main idea is to apply the degree for SO(2)-equivariant gradient operators defined by the second
Adams   +26 more
core   +3 more sources

From the Fibonacci Icosagrid to E8 (Part I): The Fibonacci Icosagrid, an H3 Quasicrystal

open access: yesCrystals
This paper introduces a new kind of quasicrystal by Fibonacci-spacing a multigrid of a certain symmetry, like H2, H3, T3, etc. Multigrids of a certain symmetry can be used to generate quasicrystals, but multigrid vertices are not a quasicrystal due to ...
Fang Fang, Klee Irwin
doaj   +1 more source

High order analysis of nonlinear periodic differential equations

open access: yes, 2003
In this letter we apply a method recently devised in \cite{aapla03} to find precise approximate solutions to a certain class of nonlinear differential equations.
Amore   +9 more
core   +1 more source

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