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1、J.Appl.Math.Comput.DOI10.1007/s12190-016-1049-0ORIGINALRESEARCHExistenceandstabilityforHadamardp-typefractionalfunctionaldifferentialequationsHaihuaWang1·YanqiongLiu1·HuanranZhu2Received:3July2016©KoreanSocietyforComputationalandAppliedMathematics2016AbstractInthispaper,westudythe
2、existenceandHyersUlamstabilityofsolutionsforaHadamardp-typefractionalorderfunctionalandneutralfunctionaldifferentialequationsinvolvinginitialvalueproblems.SufficientconditionswhichguaranteetheexistenceandHyersUlamstabilityarenewandobtained.KeywordsHadamardfractionalderivative·p-fun
3、ction·Existence·HyersUlamstabilityMathematicsSubjectClassification26A33·34K101IntroductionLetJ⊂R.DenoteC(J,R)astheBanachspaceofallcontinuousfunctionsfromJintoRwiththenormx=supt∈J
4、x(t)
5、.Givenanyr>0,letC=C([−r,0],R)denotethespaceofcontinuousfunctionson[−r,0].Foranyelementφ∈C,definet
6、henormφ∗=supθ∈[−r,0]
7、φ(θ)
8、.ThispaperisconcernedwiththeexistenceofsolutionsandstabilityforinitialvalueproblemsofHadamardp-typefractionalorderfunctionaldifferentialequations.InSect.3,weareinterestedintheexistenceandstabilityofthefollowinginitialvalueproblems:BHaihuaWangwanghoiwan@
9、163.com1DepartmentofMathematics,GuangxiScienceandTechnologyNormalUniversity,Laibin546100,Guangxi,PeoplesRepublicofChina2DepartmentofMathematics,HunanUniversityofScienceandTechnology,Xiangtan411201,Hunan,PeoplesRepublicofChina123H.Wangetal.qDa+x(t)=f(t,xt),(1.1)xa=ϕ,(a,ϕ)∈,qwhere
10、Da+istheHadamardfractionalderivativeoforder00,isanopensubsetof(0,+∞)×C.f:→Risagivenfunctionsatisfiessomeassumptionsthatwillbespecifiedlater,ϕ∈Candϕ(0)=0.xt∈Cisdefinedbyxt(θ)=x(p(t,θ)),where−r≤θ≤0,p(t,θ)isap-function.Section4isdevotedtoHadamardfractionalneutralfunctionaldif
11、ferentialequa-tions:qDa+[x(t)−g(t,xt)]=f(t,xt),(1.2)xa=ϕ,(a,ϕ)∈,wherea,f,ϕandareasinProblem(1.1),andg:C→Risagivenfunctionsuchthatg(a,ϕ)=0.Fractionaldifferentialequationshavegainedconsiderableimportanceduetotheirapplicationsinvariousscience,suchasphysics,chemistry,engineering,po
12、lymerrhe-ology,etc.Inrecentyears,