Zobrazeno 1 - 10
of 2 422
pro vyhledávání: '"Djoudi A"'
Publikováno v:
Nonautonomous Dynamical Systems, Vol 8, Iss 1, Pp 297-306 (2021)
This paper provides sufficient conditions to guarantee the existence, uniqueness and continuous dependence of positive solutions of a nonlinear fourth order iterative differential equations with two-point and integral boundary conditions. The main ar
Externí odkaz:
https://doaj.org/article/ce39c832cc5244baa726e0166f650730
Publikováno v:
Moroccan Journal of Pure and Applied Analysis, Vol 7, Iss 1, Pp 20-29 (2021)
In this article we study the existence of positive solutions for second-order nonlinear neutral dynamic equations on time scales. The main tool employed here is Schauder’s fixed point theorem. The results obtained here extend the work of Culakova,
Externí odkaz:
https://doaj.org/article/fc1c30466198405e81e259fc591e5236
Publikováno v:
Mathematica Moravica, Vol 24, Iss 1, Pp 109-122 (2020)
In this paper, we study the existence, uniqueness and estimate of solutions for nonlinear hybrid implicit Caputo fractional differential equations by using the contraction mapping principle and the generalization of Gronwall's inequality. After that,
Externí odkaz:
https://doaj.org/article/a9da4a5229c446108d24dd8fa4221c13
Autor:
Ardjouni Abdelouaheb, Djoudi Ahcene
Publikováno v:
Mathematica Moravica, Vol 23, Iss 2, Pp 17-28 (2019)
In this paper, the following third-order nonlinear delay differential equation with periodic coefficients x'''(t) + p(t)x''(t) + q(t)x'(t) + r(t)x(t) = f(t,x(t), x(t - t (t))) + d/dt g (t, x(t - t (t))), is considered. By employing Green's function a
Externí odkaz:
https://doaj.org/article/4424dfb566484e22984b080967b3ab99
Publikováno v:
Acta Universitatis Sapientiae: Mathematica, Vol 8, Iss 2, Pp 255-270 (2016)
In this paper, we study the existence of periodic and non-negative periodic solutions of the nonlinear neutral differential equation ddtx(t)=−a (t) h (x (t))+ddtQ (t, x (t−τ (t)))+G (t, x(t), x (t−τ (t))).$${{\rm{d}} \over {{\rm{dt}}}}{\rm{x}
Externí odkaz:
https://doaj.org/article/8e94e1f5de8246cdbc7b82e1ea136323
Publikováno v:
Mathematica Moravica, Vol 20, Iss 1, Pp 17-29 (2016)
We use a variant of Krasnoselskii's fixed point theorem to show that the nonlinear difference equation with functional delay Δx (t) = - a (t) g (x (t)) + c (t)Δx(t_τ(t)) + q (t, x(t), x(t_τ(t))), has periodic solutions. For that end, we invert th
Externí odkaz:
https://doaj.org/article/affc14e8e8cb471991b09452d097b243
Publikováno v:
Mathematica Moravica, Vol 19, Iss 1, Pp 57-71 (2015)
In this paper, we study the existence and uniqueness of periodic solutions of the system of nonlinear neutral difference equations ∆x (n) = A(n) x (n - t (n)) + ∆Q(n; x (n - g (n))) + G(n; x (n) ; x (n - g (n))). By using Krasnoselski's fixed poi
Externí odkaz:
https://doaj.org/article/a32d0814a8e547baab6fca37eafa580c
Autor:
Ardjouni Abdelouaheb, Djoudi Ahcene
Publikováno v:
Mathematica Moravica, Vol 19, Iss 2, Pp 1-18 (2015)
In this paper we use the contraction mapping principle to obtain asymptotic stability results of a nonlinear neutral integro-differential equation with variable delay. An asymptotic stability theorem with a necessary and sufficient condition is prove
Externí odkaz:
https://doaj.org/article/65a0a9bb379d43efa5be8f616831a8c1
Publikováno v:
Advances in Nonlinear Analysis, Vol 3, Iss 3, Pp 157-163 (2014)
In this article we study the existence of positive periodic solutions for a fourth-order nonlinear neutral differential equation with variable delay. The main tool employed here is the Krasnoselskii's fixed point theorem dealing with a sum of two map
Externí odkaz:
https://doaj.org/article/1e9a2c909009431a9fed086e59ae1301
Autor:
Ardjouni Abdelouaheb, Djoudi Ahcene
Publikováno v:
Mathematica Moravica, Vol 18, Iss 2, Pp 91-103 (2014)
In this paper we use the contraction mapping theorem to obtain asymptotic stability results of the nonlinear neutral differential equation with infinite delay d/dt x(t) = -a(t) x (t - T1(t)) + d/dt Q (t, x (t - T2(t))) + ∫ D(t,s) f (x (s))ds. An as
Externí odkaz:
https://doaj.org/article/9d36f0f4267f491ab7c16bfb055fef44