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时间:2019-03-06
《加权bergman空间上的紧toeplitz和hankel算子积new》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、维普资讯http://www.cqvip.com第29卷第3期湘潭大学自然科学学报VoI.29No.32007年9月NaturalScienceJournalofXiangtanUniversitySept.2007CompactProductsofHankelandToeplitzOperatorsonWeightedBergmanSpaceTANGShu—l∞曜(DepartmentofMathematics。XiangtanUniversity。Xiangtan411105China)【Abstract】In
2、thispaper。wesivcasuficientandnecessaryconditionthattheproductsofToeplitzandHankeloperators’。foranalyticfuncfionsf,giscompactontheweightedBergmanspace(D。(I+a)(I—I:I)dA(z)).Keywords:WeightedBergmanspace;ProductsofToeplltzandHankeloperators;Compactoperator加权Bergm
3、an空间上的紧Toeplitz和Hankel算子积唐树江(湘潭大学数学系,湖南湘潭4l1105)【摘要】主要考察一类加权Bergman空间上的紧算子,得到了当f,g是解析函数时,Tocplitz和Hankel算子的积7H.’是紧算子的充分必要条件.关键词:加权Bergman空间;Toeplitz和Hankel算子积;紧算子中圈分类号:0177.1文献标识码:A文章编号:1000—5900(2007)02—0029—081IntroductionLetdAdenotetheLebesgueareameasureont
4、heunitdiskDnormalizedSOthatthemeasureofDequalsto1.Andfor∈(一1,∞),letdA。denotethemeasuredA。(z)=(1+)(1-IzI)。da(z),forp∈[1,∞),LP(D,dA。)isaBanachspace.L”(D,dA)isthesetofessentiallyboundedfunctiononD,and(D,dA。)isaclosedsubspaceconsistingofanalyticfunctioninL”(D,dA。)
5、.Inthispaperwedenote(D,dA。)by(dA。).ThentheweightedBergmanspaceL:(dA。)isaHilbertspaceconsistingofanalyt—icfunctioninL(D,dA。),andwedenoteainnerproductonL(D,dA。)by=(JDu(z)t,(z)da。(z))虿foreveryl‘,t,∈L(D,dA。).Fromconclusionof[1],weknownthat:(dA。)isareproduci
6、ngkernelHil—bertspaceonDwithreproducingkernel:1()‘rorf∈L2(D,dA。),Toeplitzoperator巧andHankeloperatorwithsymbolfaredefinedontheBerg-man(weighted)spaceL:(dA。)byIl=P。),Vh∈L:(dA)andIl=(1一P)),Vh∈L:(dA。)forallpolynomialsh,wherePaistheorthogonalprojectionfromL2(D,dA。)
7、to(dA。).DuetoreproducingpropositionsoftheweightedBergmanspaceweobtainsomepropositionofToeplitzand·收稿日期:2005—06—12~作者简介:唐树江(1977一),男,湖南永州人,讲师.E—mail:jl2snaker@163.com~.■h维普资讯http://www.cqvip.comNaturalScienceJournalofXiangtanUniversityHankeloperators:(P/)()=<厂,
8、>=(z),()()=(())()=『DdL4(z),(H/h)()=(1一))()=(1dL4()一i)一f0r∈(dL4)andw∈D.Thenfuncti。ns,thusdefinedare,infact,allalyticfui仰·KatelStoethofandD.Zheng[2]haveobtainedcompletecharacterizafi
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