On second order periodic boundary-value problems with upper and lower solutions in the reversed order

In this paper, we study the differential equation with the periodic boundary value $$displaylines{ u''(t)=f(t, u(t), u'(t)),quad tin [0, 2pi]cr u(0)=u(2pi), quad u'(0)=u'(2pi). }$$ The existence of solutions to the periodic boundary problem above with appropriate conditions...

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Bibliographic Details
Main Authors: Haiyin Gao, Shiyou Weng, Daqing Jiang, Xuezhang Hou
Format: Article
Language:English
Published: Texas State University 2006-02-01
Series:Electronic Journal of Differential Equations
Subjects:
Online Access:http://ejde.math.txstate.edu/Volumes/2006/25/abstr.html