Journal of Fixed Point Theory and Applications ( IF 1.8 ) Pub Date : 2021-04-10 , DOI: 10.1007/s11784-021-00864-2 J. Caballero , B. López , K. Sadarangani
In this paper, we study the existence of positive solutions for the following nonlinear fractional boundary value problem:
$$\begin{aligned} \left. \begin{array}{ll}D^{\alpha }_{0^+} u(t)+f(t,u(t),(Hu)(t))=0,&{} 0<t<1,\\ u(0)=u'(0)=0,\ \ u'(1)=\beta u(\xi ), \end{array} \right\} \end{aligned}$$where \(2<\alpha \le 3\), \(0<\xi < 1\), \(0\le \beta \xi ^{\alpha -1}<(\alpha -1)\), H is an operator (not necessarily linear) applying \(\mathcal {C}[0,1]\) into itself and \(D^{\alpha }_{0^+}\) denotes the standard Riemann–Liouville fractional derivative of order \(\alpha \). Our solutions are placed in the space of Lipschitz functions and the main tools used in the study are a sufficient condition for the relative compactness in Hölder spaces and the Schauder fixed point theorem. Moreover, we present one example illustrating our results.
中文翻译:
具有非局部边界条件的分数边界问题在Lipschitz函数空间中正解的存在
在本文中,我们研究以下非线性分数边值问题的正解的存在:
$$ \ begin {aligned} \ left。\ begin {array} {ll} D ^ {\ alpha} _ {0 ^ +} u(t)+ f(t,u(t),(Hu)(t))= 0,&{} 0 <t <1,\\ u(0)= u'(0)= 0,\ \ u'(1)= \ beta u(\ xi),\ end {array} \ right \} \ end {aligned} $$其中\(2 <\ alpha \ le 3 \),\(0 <\ xi <1 \),\(0 \ le \ beta \ xi ^ {\ alpha -1} <(\ alpha -1)\),H是一个运算符(不一定是线性的),将\(\ mathcal {C} [0,1] \)应用于自身,而\(D ^ {\ alpha} _ {0 ^ +} \)表示标准Riemann–Liouville分数阶\(\ alpha \)的导数。我们的解决方案位于Lipschitz函数的空间中,并且该研究中使用的主要工具为Hölder空间中的相对紧致和Schauder不动点定理提供了充分的条件。此外,我们提供了一个示例来说明我们的结果。