简介:ThispapershowsthatXisuniformlynon-squareiffP(η_o)>0forsomeη_o∈(0,2).ThusXissuper-reflexiveifandonlyifforXthereexistsanequivalentnormwhichmeetstheabovecondition.Byvirtueofthebeforementionedresult,theauthorderivesthenecessary,andsuffi-cientconditionsforXandl~p(X_j)beinguniformlynon-square,respectively,andgivesacharacterizationoffinite-dimensionalspaceswhichareuniformlynon-square.
简介:InthepresentpaperweextendpreviousresultsaboutthemonotoaicityofBernstein-typeoperatorsrdtiwetoconvexfunctionsandaboutthepreservationofLipschitzclasses.
简介:为x=(x1,x2,,xn)+nn,对称的功能Fn(x,r)并且Gn(x,r)被$$F_n定义(x,r)=F_n(x_1,x_2,\cdots,x_n;r)=\sum\limits_{1\leqslanti_1and$$G_n(x,r)=G_n(x_1,x_2,\cdots在这份报纸,F的Schur凸状<潜水艇class=“a-plus-plus”>n(x,r)并且G<潜水艇class=“a-plus-plus”>n(x,r)被讨论。作为应用程序,由为一个Schur凸的函数的独立变量的bijective转变,作者为一些另外的对称的函数获得Schur凸状,它在最近的文学包含主要结果;并且由majorization的理论的使用建立一些不平等。特别地,作者从这份报纸的结果导出Weierstrass不平等和Ky扇子不平等,并且给Saftas的归纳在n维的空间和其它推测。
简介:LetEbeauniformlysmoothBanachspace,KbeanonemptyclosedconvexsubsetofE,andsuppose:T:K→Kisacontinuousφ-stronglypseudocontractiveoperatorwithaboundedrange.Usinganewanalyticalmethod,undergeneralcases,theIshikawaiterativeprocess{xn}convergesstronglytotheuniquefixedpointx*oftheoperatorTwereproved.Thepapergeneralizesandextendsalotofrecentcorrespondingresults.
简介:PARABOLICEQUATIONSWITHBOTHNON-CONVEXITYNONLINEARITIESANDSTRONGDEGENERACYYinJingxue(尹景学)(InstituteofMathematics,JilinUniversit...
简介:Westudymicroscopicspacetimeconvexitypropertiesoffullynonlinearparabolicpartialdifferentialequations.Undercertaingeneralstructurecondition,weestablishaconstantranktheoremforthespacetimeconvexsolutionsoffullynonlinearparabolicequations.Atlast,weconsidertheparabolicconvexityofsolutionstoparabolicequationsandtheconvexityofthespacetimesecondfundamentalformofgeometricflows.
简介:Inthisarticle,wewillinvestigatethepropertiesofiterativesequencefornon-expansivemappingsandpresentseveralstrongandweakconvergenceresultsofsuccessiveapproximationstofixedpointsofnon-expansivemappingsinuniformlyconvexBanachspaces.Theresultspresentedinthisarticlegeneralizeandimprovevariousonesconcernedwithconstructivetechniquesforthefixedpointsofnon-expansivemappings.
简介:我们在Dirichlet边界条件下面为边界和充分非线性的、一致地椭圆形的方程的连续粘性答案的内部坡度估计调查锋利的条件。当这些条件被违背时,能有在内部或在领域的边界上坡度骤起。特别地,我们比以前在更一般的生长条件下面在连续粘性答案的本地、全球的Lipschitz连续性上导出锋利的结果。当Dirichlet条件满足在时,边界附近的Lipschitz整齐允许我们预言一古典并且不仅仅在粘性意义,在分开能发生的地方。另一后果是这:如果内部坡度骤起发生,露天梯级类型解决方案能一般来说变得不连续,以便Dirichlet问题能在连续粘性解决方案的类上变得不可解。
简介:Inthispaper,weprovethatakindofsecondorderstochasticdiferentialoperatorcanberepresentedbythelimitofsolutionsofBSDEswithuniformlycontinuouscoefcients.Thisresultisageneralizationoftherepresentationfortheuniformlycontinuousgenerator.Withthehelpofthisrepresentation,weobtainthecorrespondingconversecomparisontheoremfortheBSDEswithuniformlycontinuouscoefcients,andgetsomeequivalentrelationshipsbetweenthepropertiesofthegeneratorgandtheassociatedsolutionsofBSDEs.Moreover,wegiveanewproofaboutg-convexity.
简介:Thepurposeofthispaperistoinvestigatesomesufficientandnecessaryconditionsforthree-stepIshikawaiterativesequenceswitherrortermsforuniformlyquasi-Lipschitzianmappingstoconvergetofixedpoints.OurresultsextendandimprovetherecentonesannouncedbyLiu[3,4],XuandNoor[5],andmanyothers.
简介:InthepresentpaperweintroducearandomiterationschemeforthreerandomoperatorsdefinedonaclosedandconvexsubsetofauniformlyconvexBanachspaceandproveitsconvergencetoacommonfixedpointofthreerandomoperators.Theresultisalsoanextensionofaknowntheoreminthecorrespondingnon-randomcase.
简介:Inthispaper,letKbeanonemptysubsetofauniformlysmoothBanachspaceX,andT:K→2~kbeamultivaluedoperatorofthemonotonetype.TheiterativesequencewhichconvergesstronglytotheuniquefixedpointofTisgiven.OurresultsaretheextensionandimprovementsoftheresultsobtainedpreviouslybyseveralauthorsincludingDunn,Chidume,DengandDing.