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Some higher-order multi-point boundary value problem at resonance. (English) Zbl 1059.34010
Summary: This paper deals with the existence of solutions for the following $$n$$th-order multi-point boundary value problem at resonance $\begin{gathered} x^{(n)}(t)= f(t, x(t), x'(t),\dots, x^{(n-1)}(t))+ e(t),\quad t\in (0,1),\\ x(0)= \sum^{m-2}_{i=1} \alpha_i x(\xi_i),\;x'(0)=\cdots= x^{n-2)}(0)= 0,\quad x(1)= x(\eta),\end{gathered}$ where $$f: [0, 1]\times\mathbb{R}^n\to\mathbb{R}$$ is a continuous function, $$e\in L^1[0,1]$$, $$\alpha_i\in \mathbb{R}$$, $$1\leq i\leq m-2$$, $$0< \xi_1< \xi_2<\cdots< \xi_{m-2}< 1$$ and $$0<\eta< 1$$. An existence theorem is obtained by using the coincidence degree theory of Mawhin.

##### MSC:
 34B10 Nonlocal and multipoint boundary value problems for ordinary differential equations
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##### References:
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