On Second Order Periodic Boundary-value Problems with Upper and Lower Solutions in the Reversed Order
نویسندگان
چکیده
In this paper, we study the differential equation with the periodic boundary value u′′(t) = f(t, u(t), u′(t)), t ∈ [0, 2π] u(0) = u(2π), u′(0) = u′(2π). The existence of solutions to the periodic boundary problem above with appropriate conditions is proved by using an upper and lower solution method.
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تاریخ انتشار 2006