Original title unknown
Issledovanija po prikladnoj matematike
Kadalbajoo, M.K., Sharma, K.K. (2006)
ETNA. Electronic Transactions on Numerical Analysis [electronic only]
Fu, Xiangling, Wang, Weibing (2010)
Journal of Inequalities and Applications [electronic only]
Gen-Qiang Wang, Sui Sun Cheng (2002)
Annales Polonici Mathematici
A priori bounds are established for periodic solutions of an nth order Rayleigh equation with delay. From these bounds, existence theorems for periodic solutions are established by means of Mawhin's continuation theorem.
Boichuk, Alexander A., Grammatikopoulos, Myron K. (2003)
Abstract and Applied Analysis
Karakostas, G.L., Tsamatos, P.Ch. (2002)
Electronic Journal of Differential Equations (EJDE) [electronic only]
Bai, Chuanzhi, Xu, Xinya (2006)
Electronic Journal of Differential Equations (EJDE) [electronic only]
El-Shahed, Moustafa (2007)
Abstract and Applied Analysis
Mavridis, K.G., Tsamatos, P.Ch. (2004)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Karakostas, George L. (2006)
Electronic Journal of Differential Equations (EJDE) [electronic only]
Jin, Fengfei, Yan, Baoqiang (2008)
Boundary Value Problems [electronic only]
Hu, Liang-Gen, Xiao, Ti-Jun, Liang, Jin (2009)
Boundary Value Problems [electronic only]
Alexander Domoshnitsky (2014)
Mathematica Bohemica
We propose an approach for studying positivity of Green’s operators of a nonlocal boundary value problem for the system of linear functional differential equations with the boundary conditions , , where and are linear bounded “local” and “nonlocal“ functionals, respectively, from the space of absolutely continuous functions. For instance, or and can be considered. It is demonstrated that the positivity of Green’s operator of nonlocal problem follows from the positivity of Green’s operator...
Vincent Šoltés (1995)
Archivum Mathematicum
The equation to be considered is The aim of this paper is to derive sufficient conditions for property (A) of this equation.
Anderson, D.R., Moats, L.M. (2007)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
Jan Ligęza (2005)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
We study the existence of positive solutions of the integral equation in both and spaces, where and . Throughout this paper is nonnegative but the nonlinearity may take negative values. The Krasnosielski fixed point theorem on cone is used.
Jankowski, T., Szatanik, W. (2006)
Boundary Value Problems [electronic only]
Daqing Jiang, Xiao Jie Xu, Donal O'Regan, Ravi P. Agarwal (2005)
Czechoslovak Mathematical Journal
In this paper we present some new existence results for singular positone and semipositone boundary value problems of second order delay differential equations. Throughout our nonlinearity may be singular in its dependent variable.
Olaru, Ion Marin (2004)
General Mathematics
Shujie, Yang, Bao, Shi (2010)
Boundary Value Problems [electronic only]