华南师范大学学报(自然科学版)JournalofSouthChinaNormalUniversity(NaturalScienceEdition)2022,54(6):95-101doi:10.6054/j.jscnun.2022090收稿日期:2021-08-29《华南师范大学学报(自然科学版)》网址:http:∥journal-n.scnu.edu.cn基金项目:黑龙江省自然科学基金项目(LH2020A017)*通信作者:赵微,Email:zw_19791220@163.com带有分数阶导数边值条件的分数阶微分方程正解的存在性赵微*,高扬(大庆师范学院数学科学学院,大庆163712)摘要:讨论了一类带有分数阶导数边值条件的分数阶微分方程Dv0+u(t)+h(t)f(t,u(t))=0(0<t<1,n-1<v≤n),u(0)=u'(0)=u″(0)=…=u(n-2)(0)=0(n≥3),(Dα0+u(t))t=1=Σm-2i=1βi(Dαi0+u(t))t=ηi(1≤αi≤α≤n-2),{其中,Dv0+是Rimann-Liouvile分数阶导数,ηi∈(0,1),0<η1<η2<…<ηm-2<1,βi∈[0,∞)。文中给出其格林函数及相关性质,运用凸泛函上的不动点指数定理来计算不动点指数,从而得到了上述边值问题至少存在一个正解的结论。最后通过一个例子说明定理的具体应用。关键词:分数阶微分方程;分数阶边值条件;格林函数;凸泛函;不动点指数中图分类号:O175.8文献标志码:A文章编号:1000-5463(2022)06-0095-07ExistenceofPositiveSolutionsforFractionalDifferentialEquationwithFractionalDifferentialBoundaryValueConditionZHAOWei*,GAOYang(DepartmentofMathematics,DaqingNormalUniversity,Daqing163712,China)Abstract:TheexistenceofpositivesolutionsforthefractionaldifferentialequationwithfractionaldifferentialboundaryvalueconditionDv0+u(t)+h(t)f(t,u(t))=0(0<t<1,n-1<v≤n),u(0)=u'(0)=u″(0)=…=u(n-2)(0)=0(n≥3),(Dα0+u(t))t=1=Σm-2i=1βi(Dαi0+u(t))t=ηi(1≤αi≤α≤n-2)�������isconsideredundersomeconditions,whereDv0+isRimann-Liouvilefractionaldifferential,ηi∈(0,1),0<η1<η2<…<ηm-2<1,βi∈[0,∞).Firstly,theGreenfunctionfortheabovefractionaldifferentialequationisconstructed.ThepropertiesoftheGreen'sfunctionareobtained.Secondly,byusingthefixedpointindextheoremonconvexfunc-tionaltocalculatethefixedpointindex,theconclusionthatthereisatleastonepositivesolutiontotheaboveboundaryvalueproblemisobtained.Finally,anexampleisgiventoillustratetheapplicationofthe...