On some nonlocal boundary value problems for nonlinear ordinary differential equations with delay
Journal Title: Дослідження в математиці і механіці - Year 2017, Vol 22, Issue 2
Abstract
The results of this paper were reported at International Workshop “Nonlinear Analysis and Nonautonomous Ordinary Differential Equations” (Odessa, Ukraine, June 23-27, 2017). In the paper, nonlocal boundary value problems are studied for higher order nonlinear ordinary differential equations with delay. More precisely, on a finite interval r𝑎,𝑏s, the differential equation 𝑢p𝑛qp𝑡q _ 𝑓p𝑡,𝑢p𝜏1p𝑡qq, . . . ,𝑢p𝑛_1qp𝜏𝑛p𝑡qqq is considered with the boundary conditions 𝑢p𝑖_1qp𝑎q _ 𝑐𝑖 p𝑖 _ 1, . . . ,𝑛 _ 1q, ℓp𝑢q _ 𝑐𝑛, where 𝑛 ¥ 2, 𝑓 : r𝑎,𝑏s _ R𝑛 Ñ R is a continuous function having continuous partial derivatives in the last 𝑛 arguments, 𝜏𝑖 : r𝑎,𝑏s Ñ r𝑎,𝑏s p𝑖 _ 1, . . . ,𝑛q are continuous functions satisfying the inequalities 𝜏𝑖p𝑡q ¤ 𝑡 for 𝑎 ¤ 𝑡 ¤ 𝑏 p𝑖 _ 1, . . . ,𝑛q, ℓ : 𝐶𝑛_1 pr𝑎,𝑏sq Ñ R is a linear bounded functional, and 𝑐𝑖 p𝑖 _ 1, . . . ,𝑛q are real constants. Sufficient conditions are established for the unique solvability of that problem. An analogue of Fredholm’s first theorem is obtained. The conditions of the main theorems guarantee also the well-posedness of that problem. An example is constructed showing the optimality of the obtained conditions. MSC: 34B10, 34B15.
Authors and Affiliations
N. Partsvania
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