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进一步推广了Roper-Suffridge算子,并讨论推广后的算子保持双全纯映照子族的一些性质,从定义出发证明推广后的算子在G~n中的单位球B~n上保持α次β型螺形性及强β型螺形性,并作为特殊情况得出推广后的算子在相应域上保持α次星形性及强星形性,且讨论了推广后的Roper-Suffridge算子的偏差定理. 相似文献
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主要研究Roper-Suffridge延拓算子在推广的Hartogs域上的性质.借助双全纯映照的偏差定理,得到延拓算子在Ω_N上保持强α次殆β型螺形映照、α次殆β型螺形映照和α次β型螺形映照的性质,进而得到B~n上相应的结论.所得结论包含已有的结果并为研究C~n中的双全纯映照提供了新的途径. 相似文献
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将Roper-Suffridge箅子在C~n中单位球B~n上做了进一步推广,并考察推广后的算子何时能保持双全纯映照子族的性质.利用k阶零点及双全纯映照子族的增长定理,重点研究了推广后的算子在B~n上保持α次β型螺形映照及强β型螺形映照的性质,并由调和函数的最小值原理及具有正实部函数的性质,揭示了推广后的算子能够嵌入Loewner链,从而得到推广后的算子在B~n上保持α次殆β型螺形映照的性质. 相似文献
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从定义出发证明复Banach空间特定域上推广的Roper-Suffridge算子保持α次强β型螺形性及ρ次抛物型β型螺形性,由此得到推广后的算子在复Banach空间特定域上保持α次强星形性、ρ次抛物星形性及抛物星形性,为由复平面C中单位圆盘D上的α次强β型螺形映照及ρ次抛物β型螺形映照来构造复Banach空间特定域上相应的映照提供了一种新的途径,充实了对Roper-Suffridge算子的研究. 相似文献
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该文将已有的Roper-Suffridge延拓算子在Bergman-Hartogs域上进行了推广,应用α次β型螺形映照及复数λ阶殆星映照的几何性质及增长定理,讨论了推广后的RoperSuffridge延拓算子在Bergman-Hartogs域上保持α次β型螺形性及复数λ阶殆星性,并得到一些特殊情况.所得结论为构造多复空间中的α次β型螺形映照及复数λ阶殆星映照提供了新的途径. 相似文献
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《数学物理学报(A辑)》2015,(4)
定义了螺形函数的新子族,即ρ次椭圆星形函数和ρ次椭圆形β型螺形函数,并将这些定义推广到多复变数空间中,得到推广的Roper-Suffridge算子在不同空间不同区域上保持ρ次椭圆星形映照和ρ次椭圆形β型螺形映照的性质,由此可以在多复变数空间中构造出许多ρ次椭圆形β型螺形映照.所得结论丰富了对螺形映照子族及推广的Roper-Suffridge算子的研究. 相似文献
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《数学物理学报(A辑)》2016,(3)
主要讨论一类推广的Roper-Suffridge算子在一定条件下能够嵌入Loewner链,并从α次殆β型螺形映照的解析特征出发证明推广的Roper-Suffridge算子在一类有界完全Reinhardt域上保持α次殆β型螺形性.所得结果推广了已有的结论. 相似文献
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《数学的实践与认识》2015,(13)
利用强α型螺形映照的增长定理及推广的RDper-Suffridge算子的性质,讨论有界平衡域上强α型螺形映照的偏差上界,并作为特殊情况得到C~n中单位球B~n上强α型螺形映照的偏差上界估计以及强星形映照的偏差上界估计.所得结论丰富了对正规化双全纯映照的偏差的研究. 相似文献
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研究一类推广的Roper-Suffridge算子F(z)=(f(z_1)+f′(z_1)∑_(k=2)~nakz_k~pk,f′(z)1)(~1/p2)z_2,…,f′(z_1)~(1/pn)z_n)′,证明该算子在复欧氏空间中的Reinhardt域Ω_(n,p2,%…,pn)={z=(z_1,…,z_n)∈C~n:|z_|~2+∑_(k=2)~n|zk|~(pk)1,Pk∈N~+,k=2,…,n}上分别保持α次的殆β型螺形性,α次的β型螺形性及强β型螺形性. 相似文献
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The authors propose a new approach to construct subclasses of biholomorphic mappings with special geometric properties in several complex variables. The RoperSuffridge operator on the unit ball B~n in C~n is modified. By the analytical characteristics and the growth theorems of subclasses of spirallike mappings, it is proved that the modified Roper-Suffridge operator [Φ_(G,γ)(f)](z) preserves the properties of S_Ω~*(A, B), as well as strong and almost spirallikeness of type β and order α on B~n. Thus, the mappings in S_Ω~*(A, B), as well as strong and almost spirallike mappings, can be constructed through the corresponding functions in one complex variable. The conclusions follow some special cases and contain the elementary results. 相似文献
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In this paper, the authors extend the Roper-Suffridge operator on the generalized Hartogs domains. They mainly research the properties of the extended operator.By the characteristics of Hartogs domains and the geometric properties of subclasses of spirallike mappings, they obtain the extended Roper-Suffridge operator preserving almost starlikeness of complex order λ, almost spirallikeness of type β and order α, parabolic spirallikeness of type β and order ρ on the Hartogs domains in different co... 相似文献
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In this paper, we generalize the Roper–Suffridge operator on the extended Hartogs domains.By using the geometric properties and the growth theorems of subclasses of biholomorphic mappings,we obtain the generalized operators preserve the properties of parabolic and spirallike mappings of type β and order ρ, S*_Ω(β, A, B), almost starlike mapping of complex order λ on ΩN under different conditions, and thus we get the corresponding results on the unit ball B~n in C~n. The conclusions lead to some known results. 相似文献
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Tai-Shun Liu 《Journal of Mathematical Analysis and Applications》2006,322(1):107-120
In this paper, we introduce two classes of generalized Roper-Suffridge extension operators and prove that they can be embedded in Loewner chains. In particular, our proof shows that these two classes of operators preserve starlikeness and spirallikeness of type α on two important classes of Reinhardt domains in Cn, respectively. Finally, some other related results are given. 相似文献
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In this paper, we prove that the generalized Roper-Suffridge extension operator can be embeded in Loewner chains on the unit ball in Hibert spaces, and obtain the fact that the operator keeps the properties of almost spirallike mapping of type β and order α, almost starlikeness of order α, spirallikeness of type of β and starlikeness. 相似文献
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关于局部双全纯映射的推广的Roper-Suffridge算子 总被引:15,自引:4,他引:11
§ 1. Introduction LetUbetheunitdiskinCandBnbetheunitballinCn.In 1 995 ,RoperandSuffridgeintroducedanextensionoperator.ThisoperatorisdefinedforanormalizedlocallybiholomorphicfunctionfonUbyΦn(f) (z) =F(z) =(f(z1 ) ,f′(z1 )z′) ,z =(z1 ,z′)∈Bn,(1 .1 )wherez1 ∈U ,z′=(z2 ,… ,zn)∈Cn- 1 ,andthebranchofthesquarerootischosensuchthatf′(0 ) =1 .TheRoper Suffridgeextensionoperatorhasthefollowingimportantproperties:(a)IffisanormalizedconvexfunctiononU ,thenFisanormalizedconvexmappingon… 相似文献