P-Bloch函数的偏差定理和单叶半径

In this paper, we establish distortion theorems for both normalized p-Bloch functions with branch points and normalized locally univalent p-Bloch functions defined on the unit disk, respectively. These distortion theorems give lower bounds on |f′(z)| and ■f′(z). As applications of these distortion theorems, the lower bounds of the radius of the largest schlicht disk on these Bloch functions are given, respectively. Notice that when p = 1, our results reduce to that of Liu and Minda.     

C^n中Lie球RIV（n）上的偏差定理 献给钟同德教授八十华诞

本文引入了Lie球双曲空间上映照族Hm（RIV（n））,满足m阶Jacobi行列式为零的全纯映照子族．而且当m趋于无穷时,该映照族就是RIV（n）上的局部双全纯映照族．作者用分析的方法给出了Hm（RIV（n））上的偏差定理．当m=1和m→＋∞时,结果分别都回到了Gong关于Lie球RIV（n）上的偏差定理;当n=1,其结果又回到了Liu和Minda在单位圆盘上的偏差定理．本文的方法也不同于以前．作为偏差定理的一个应用,给出了不同映照族Hm（RIV（n））上的Bloch常数估计．     

多复变数准凸映射的偏差定理

首先给出了C~n中单位多圆柱D~n上准凸映射f关于Jacobin矩阵J_f(z)的偏差定理.该定理是单位圆盘凸函数的偏差定理在多复变中的推广.其次得到了Banach空间单位球上准凸映射的偏差定理的上界.最后给出了关于准凸映射偏差定理的两个猜想.     

DISTORTION THEOREMS FOR SUBCLASSES OF STARLIKE MAPPINGS ALONG A UNIT DIRECTION IN C^n

In this paper, we obtain a distortion theorem of Jacobian matrix for biholomorphic subclasses of starlike mappings along a unit direction on the unit polydisc. These results extend the classical distortion theorem of starlike mappings to higher dimensions. We then give an upper bound estimate for biholomorphic subclasses of starlike mappings along a unit direction in a complex Banach space.     

单位球B~n上的Bohr不等式(英文)

Bohr's type inequalities are studied in this paper: if f is a holomorphic mapping from the unit ball B~n to B~n, f(0)=p, then we have sum from k=0 to∞|Dφ_P(P)[D~kf(0)(z~k)]|／k!||Dφ_P(P)||＜1 for|z|＜max{1／2 |P|,(1-|p|)／2~(1／2)andφ_P∈Aut(B~n) such thatφ_(p)=0. As corollaries of the above estimate, we obtain some sharp Bohr's type modulus inequalities. In particular, when n=1 and |P|→1, then our theorem reduces to a classical result of Bohr.     

单位球Bn上改进的Roper-Suffridge算子

研究单位球Bⁿ上改进的Roper-Suffridge算子的几何与分析特性,证明当k(k≥2)次齐次多项式P_k满足条件‖P_k‖≤(cos β)/(|1-λ|(k+2))时,改进的Roper-Suffridge算子F(z)=(f(z₁)+P_k(z₀)f’(z₁),［f’(z₁)］^1/kz₀)^T保持β型复数阶λ次殆星性.同时,证明该算子保持Bloch 性质.     

半空间上的Bohr型不等式

研究半空间P={z∈C:Re(z)-1}?D上的Bohr型不等式,建立无界单连通域P上解析函数族的Bohr半径.将解析函数族的Bohr型不等式推广到调和映射的情形,得到调和映射上的Bohr型不等式.     

多重调和映射的同向两点Schwarz引理及应用

建立单位圆盘D到单位球B^N上调和映射的同向两点Schwarz引理，给出高维单位球之间的多重调和映射的同向两点Schwarz引理，并将单位圆盘调和映射的Pavlovic的结果推广到高维多重调和映射.作为应用，得到单位球上多重调和函数的边界Schwarz引理.     

向量值全纯映射Schwarz引理的刚性

借助Schwarz引理，给出单位圆盘上全纯自映射的Schwarz引理刚性结果。作为应用，得到了单位圆盘到Cⁿ中单位球上的向量值全纯映射的刚性，丰富了Schwarz引理的研究。