复Banach空间上推广的Roper-Suffridge算子

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.     

复Banach空间上推广的Roper-Suffridge延拓算子

本文研究了推广的Roper-Suffridge算子保持一些双全纯映照子族的性质.利用一些双全纯映照子族的定义,得到了推广后的Roper-Suffridge算子在复Banach空间单位球上保持ρ次抛物形β型螺形映照及强α次殆星形映照的性质,由此得到复Hilbert空间上推广的Roper-Suffridge算子的相应性质,推广了已有的结论.     

复Banach空间单位球上几类映射的增长掩盖定理

对α次的殆β型螺形映射,α次的β型螺形映射和α次的强β型螺形映射,给出了定义,并且在复Banach空间中的单位球上分别得到它们的增长掩盖定理.     

复Banach空间单位球上几类映射的增长掩盖定理

对α次的殆β型螺形映射,α次的β型螺形映射和α次的强β型螺形映射,给出了定义,并且在复Banach空间中的单位球上分别得到它们的增长掩盖定理．     

螺形映照的新子族

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.     

复Banach空间上推广的Roper-Sufiridge延拓算子

本文研究了推广的Roper-Sufiridge算子保持一些双全纯映照子族的性质.利用一些双全纯映照子族的定义,得到了推广后的Roper-Sufiridge算子在复Banach空间单位球上保持ρ次抛物形β型螺形映照及强α次殆星形映照的性质,由此得到复Hilbert空间上推广的Roper-Sufiridge算子的相应性质,推广了已有的结论.     

α次殆β型螺形映照齐次展开式的精细估计

从Loewner链的角度讨论C~n中单位球B~n上α次殆β型螺形映照齐次展开式的相关项的上界,并作为特殊情况得出β型螺形映照、星形映照和α次殆星形映照齐次展开式的相关项的上界估计,推广了螺形映照及星形映照齐次展开式的二次项系数的上界估计.     

改进的Roper-Suffridge算子的性质及其偏差

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.     

沿单位方向上的ρ次抛物星形映射的偏差定理

目前多种双全纯映射的偏差估计结果还较少.针对这一情况,本文研究了复Banach空间中开单位球B及欧氏空间中单位多圆柱D_n单位方向上的p次抛物星形映射的偏差估计问题.利用ρ次抛物星形映射定义中的不等式及已知的增长结果,获得了上述域上的ρ次抛物星形映射的偏差估计.     

B~n上推广的Roper-Suffridge算子的性质

讨论改进后的Roper-Suffridge延拓算子保持双全纯映照子族的性质.借助双全纯映照子族的解析特征及其偏差结论,得到改进后的Roper-Suffridge延拓算子在一定条件下保持α次殆β型螺形映照、α次β型螺形映照、强β型螺形映照的性质,从而得到改进后的算子在一定条件下保持α次殆星形性、α次星形性和强星形性.所得结论为在多复变数空间中构造这些双全纯映照提供了一种新的途径.     

Growth Theorem and Distortion Theorem for a Sub class of Parab olic Starlike Mappings

In this article, we firstly introduce a subclass of parabolic starlike mappings writen as P S (β;ρ). Secondly, the growth theorem for P S (β;ρ) on the unit ball in complex Banach space is obtained. Finaly, as the application of the growth theorem of P S (β;ρ), the distortion theorem along a unit direction is also established.     

Biholomorphic Mappings and the Extension Operators on New Hartogs Domains

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.     

Extension Operators Preserving Biholomorphic Mappings on Hartogs Domains*

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...     

On Spirallike Mappings in Several Complex Variables

§１．　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎ１９３３,Ｈ．ｃａｒｔａｎｐｏｉｎｔｅｄｏｕｔｔｈａｔｔｈｅｒｅｄｏｅｓｎｏｔｅｘｉｓｔｔｈｅｃｏｒｒｅｓｐｏｎｄｉｎｇＢｉｅｂｅｒｂａｃｈｃｏｎ－ｊｅｃｔｕｒｅｆｏｒｂｉｈｏｌｏｍｏｒｐｈｉｃｍａｐｐｉｎｇｓｉｎｓｅｖｅｒａｌｃｏｍｐｌｅｘｖａｒｉａｂｌｅｓ．Ｈｅａｌｓｏｐｏｉｎｔｅｄｏｕｔｔｈｅｃｏｒｒｅ－ｓｐｏｎｄｉｎｇｇｒｏｗｔｈａｎｄｃｏｖｅｒｉｎｇｔｈｅｏｒｅｍｓｆａｉｌｉｎｔｈｅｃａｓｅｏｆｓｅｖｅｒａｌｃｏｍｐｌｅｘｖａｒｉａｂｌｅｓ．Ｔｈｅｎ…     

Hartogs域上延拓算子的性质

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.     

Cn中拟凸映射和星形映射的系数问题

§ 1.　Introduction　　Theconvexfunctionshavebeenextensivelystudiedinonecomplexvariable .Thesefunc tionsareeasilycharacterizedbysimpleanalyticorgeometricconditionsandtherearemanywellknownresultswhichcanhelpusunderstandtheirnature.However,thedifficultiesariseinsev eralcomplexvariables.Imposingtheconditionthatamappingbeconvexmappingturnsouttobeveryrestrictiveandsothefamilyofquasi convexmappingswasintroducedbyROPERKAandSUFFRIDGETJin [1 ].In [2 ]wehaveshown :thefamilyofquasi convexmappings…     

New Subclasses of Biholomorphic Mappings and the Modified Roper-Suffridge Operator

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.     

两类螺形映照扩充子族的偏差上界估计

偏差估计一直是多复变函数论的研究热点之一.但目前螺形映照扩充子族的偏差估计的研究成果还较少.针对这一问题,研究了复向量空间C_n中开单位球B_n,复Banach空间中单位球B和域Ω_(p_1,…,p_n)上一类α次β型,α次强β型螺形映照的偏差估计问题.利用不等式、矩阵及两类映照的增长定理等方法,获得了上述域上的两种映照的偏差上界估计,所得结果推广了一些已知的结论.