Results 21 to 30 of about 9,396 (291)

Estimates for solutions to a class of time-delay systems of neutral type with periodic coefficients and several delays

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
We consider a class of nonlinear time-delay systems of neutral type with periodic coefficients in linear terms and several delays. We establish conditions under which the zero solution is exponentially stable and obtain estimates characterizing ...
Gennadii Demidenko, Inessa Matveeva
doaj   +1 more source

Sharp exponential decay for solutions of the stationary perturbed Dirac equation

open access: yes, 2022
We determine the largest rate of exponential decay at infinity for non-trivial solutions to the Dirac equation nψ + ψ = 0in Rn, being n the massless Dirac operator in dimension n ≥ 2 and a (possibly non-Hermitian) matrix-valued perturbation such that |(x)
Cassano B.
core   +1 more source

General stability for the Kirchhoff-type equation with memory boundary and acoustic boundary conditions

open access: yesBoundary Value Problems, 2017
In this paper we consider the existence and general energy decay rate of global solution to the mixed problem for the Kirchhoff-type equation with memory boundary and acoustic boundary conditions.
Jum-Ran Kang
doaj   +1 more source

Asymptotic Stability of Solutions to a Class of Second-Order Delay Differential Equations

open access: yesMathematics, 2021
We consider a class of second-order nonlinear delay differential equations with periodic coefficients in linear terms. We obtain conditions under which the zero solution is asymptotically stable. Estimates for attraction sets and decay rates of solutions
Gennadii V. Demidenko   +1 more
doaj   +1 more source

An infinity of possible invariants for decaying homogeneous turbulence [PDF]

open access: yesPhysics Letters A, 2011
The von Karman-Howarth equation implies an infinity of invariants corresponding to an infinity of different asymptotic behaviours of the double and triple velocity correlation functions at infinite separations. Given an asymptotic behaviour at infinity for which the Birkhoff-Saffman invariant is not infinite, there are either none, or only one or only ...
openaire   +2 more sources

Unique continuation at infinity: Carleman estimates on general warped cylinders [PDF]

open access: yes
We obtain a vanishing result for solutions of the inequality $|\Delta u|\le q_1|u|+q_2|\nabla u|$ that decay to zero along a very general warped cylindrical end of a Riemannian manifold.
Pigola, Stefano   +2 more
core   +2 more sources

Radial symmetry for a generalized nonlinear fractional p-Laplacian problem

open access: yesNonlinear Analysis, 2021
This paper first introduces a generalized fractional p-Laplacian operator (–Δ)sF;p. By using the direct method of moving planes, with the help of two lemmas, namely decay at infinity and narrow region principle involving the generalized fractional p ...
Wenwen Hou   +3 more
doaj   +1 more source

Decay rates at infinity for solutions to periodic Schrödinger equations [PDF]

open access: yesProceedings of the Royal Society of Edinburgh: Section A Mathematics, 2019
AbstractWe consider the equation Δu = Vu in the half-space ${\open R}_ + ^d $, d ⩾ 2 where V has certain periodicity properties. In particular, we show that such equations cannot have non-trivial superexponentially decaying solutions. As an application this leads to a new proof for the absolute continuity of the spectrum of particular periodic ...
openaire   +3 more sources

Asymptotics of solutions to Joukovskii-Kutta type problems at infinity [PDF]

open access: yes, 2000
We investigate the behavior at infinity of solutions to Joukovskii-Kutta-type problems, arising in the linearized lifting surface theory. In these problems one looks for the perturbation velocity potential induced by the presence of a wing in a basic ...
Hinder, Rainer   +4 more
core   +1 more source

Decay at infinity for parabolic equations

open access: yes, 2005
We consider solutions to linear parabolic equations with initial data decaying at spatial infinity. For a class of advection-diffusion equations with a spatially dependent velocity field, we study the behavior of solutions as time tends to infinity. We characterize velocity fields, so that positive solutions decay or lift-off at spatial infinity as ...
Schnürer, Oliver C.   +1 more
openaire   +2 more sources

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