单位圆盘上全纯映照模的精细Schwarz引理北大核心CSCD

记DC为单位圆盘,B^p={z∈C^n:n∑i=1|z_i|~p<1},1相似文献   

Use Cesro Means To Describe Two Classes of Functions

Let H(D)be the collection of functions which are analytic in the unitdisc D.we call B_0={f∈H(D),(?)(1-|z|~2)|f’(z)|=0}litlle Bloch space.Letf∈H(D),0相似文献   

A NOTE ON SCHWARZ LEMMA FOR THE MODULUS OF HOLOMORPHIC MAPPINGS ON D

In this note, we consider a holomorphic mapping f from the unit disk D in C to p-ball Bp={z ∈Cn:∑ni=1|zi|p1},1p+∞. It is proved that for such f,|▽||f||(z)|≤1-||f(z)||2/1-|z|2,z∈D.The extremal problem is also discussed when p is an even number. This result extends some related results on Schwarz lemma.     

Q_p空间中K-泛函与光滑模等价性

<正>1引言令g(·,w)为复平面单位圆盘D(|z|1)上极点在W的Green函数g(z,w)=-log|φ_w(z)|,z,w∈D,其中φ_w为从D到其上的M(o|¨)bius变换φ_w(z)=(w-z)/(1-wz).记H(D)为D上全纯函数全体,dm(z)为Lebesgue测度.称函数f属于Q_p空间(0≤P∞)是指f(z)∈H(D)且满足||f||_(Q_p)~2:=supw∈D∫_D|f'(z)|~2g~p(z,w)dm(z)+∞.易知~([1]),||·||_(Q_p)为半模.若取模为|f(0)|+||f||_(Q_p),则Q_p空间为Banach空间,且有     

关于全纯映照模的Schwarz引理一点注记

记DC为单位圆盘,B~k C~k为开欧氏单位球,Ω是C~k(或C)中的域.记H_n(D,Ω)为满足一定条件的全纯映照族(或函数族)的全体.作者证明了若,∈Hn(D,D),则|f′(z)|≤(n|z|~(n-1))/(1-|z|~(2n))(1-|f|(z|~2),z∈DD同时,对Hn(D,B~k)中映照的模也得到类似的结果.该结论推广了Pavlovic的相应结果.     

插值多项式对解析部分的收敛估计

设D是单位圆{z||z|<1},T为单位圆周{z||z|=1}.对于f∈C(T),我们记L_n(f,z)为在n 1次单位根{e~(2kπ/n 1)i}~n_k=0上对f(z)的n次插值多项式.自然的L_n(f,z)在D内解析,因此,当f不能解析延拓到D内时,就不可能保证L_n(f,z)一致收敛于f.甚至,存在着f∈C(T),且f是某个D内解析函数的边值,但L_n(f,z)在T上发散.     

全纯函数的加权积分

§ 1　 IntroductionLet D be the unit disc in the complex plane C,dm be the Lebesgue area measure onD.We denote H (D) the setof all holomorphic functions on D.For 0 相似文献   

C～n中单位球上μ-Bloch函数的等价刻画

设μ是[0,1)上的正规函数,给出了C~n中单位球B上μ-Bloch空间β_μ中函数的几种刻画.证明了下列条件是等价的:(1)f∈β_μ;(2)f∈H(B)且函数μ(|z|)(1-|z|~2)~(γ-1)R~(α,γ)f(z)在B上有界;(3)f∈H(B)且函数μ(|z|)(1-|z|~2)~M_1-1M_1f/_zm(z)在B上有界,其中|m|=M_1;(4)f∈H(B)且函数μ(|z|)(1-|z|~2)M_2-1R~(M_2)f(z)在B上有界.     

ROPER-SUFFRIDGE EXTENSION OPERATOR ON A REINHARDT DOMAIN

Let pj ∈ N and pj≥ 1, j = 2, ···, k, k ≥ 2 be a fixed positive integer. We introduce a Roper-Suffridge extension operator on the following Reinhardt domain ΩN ={z =(z1, z′2, ···, z′k)′∈ C × Cn2×···× Cnk: |z1|2+ ||z2||p22+ ··· + ||zk ||pk k 1} given11 by F P′j(zj),(f(z1))p2 z′2, ···,(f′(z1))pk z′k)′, where f is a normaljized biholomorphic function k(z) =(f(z1) + f′(z1)=2 on the unit disc D, and for 2 ≤ j ≤ k, Pj : Cnj-→ C is a homogeneous polynomial of degree pj and zj =(zj1, ···, zjnj)′∈ Cnj, nj ≥ 1, pj ≥ 1,nj1||zj ||j =()pj. In this paper, some conditions for Pjare found under which the loperator p |zjl|pj=1reserves the properties of almost starlikeness of order α, starlikeness of order αand strongly starlikeness of order α on ΩN, respectively.     

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.     

THE SUPPORT POINTS AND EXTREME POINTS OF THE UNIT BALL OF H'p

Byσthe author denotes the areal measure on the unit disk D=z: |z|<1. Let H'p={f(z): f(z) is analytic in D and 1/π∫D|f(z)|p dσ<+∞}. Let B(H＇p)={f:f∈H＇p and 1/π∫D|f(z)|p dσ1. This article researches the support points and extreme points of B(H'p).     

关于corona(日冕)问题

设Δ={|z|<1},H~∞(Δ)表示Δ上一切有界解析函数全体所组成的函数族.它是一个Banach代数,因若f和g∈H~∞ (Δ),则fg∈H~∞(Δ),且||fg||_∞≤||f||_∞·||g||_∞.设对单位圆内任何一点z,令M_z={f∈H~∞(Δ):f(z)=0},则M_z是H~∞ (Δ)的一个极大理想.设 表示 H~∞(Δ)的极大理想空间,则它在弱拓扑下成为一个紧致的Hausdorff空间.若对z,|z|<1,则点赋值     

Some properties for certain classes of univalent functions defined by differential inequalities

Let A be the space of functions analytic in the unit disk D = {z:|z| 1}.Let U denote the set of all functions f ∈ A satisfying the conditions f(0) = f'(0)-1 = 0 and|f'(z)(z/f(z))~2-1|1(|z|1).Also,let Ω denote the set of all functions f ∈ A satisfying the conditions f(0) = f'(0)-1 = 0and|zf'(z)-f(z)|1/2(|z|1).In this article,we discuss the properties of U and Ω.     

复平面上解析Banach空间的拟不变子空间

讨论复平面上解析Banach空间具有任意指标的拟不变子空间的存在性问题.首先给出一类复平面上解析Banach空间存在任意指标拟不变子空间的判定定理.作为应用,证明了Fock型空间F~p(C)={f∈Hol(C):1/π∫_C|f(z)|~pe~(-|z|~2)dA(z)+∞,1≤p+∞}与Hilbert空间H={f∈Hol(C):1/π∫_C|f(z)|~2e~(-|z|)dA(z)+∞}具有任意指标的拟不变子空间.     

新题征展(20)

A　题组新编1 .已知 z∈ C,解下列方程 :( 1 ) z2 - 5| z| 6 =0( 2 ) z| z| - 5z 6 =0( 3) z| z| - 5| z| 6 =0( 4 ) | z2 | - 5| z| 6 =02 .已知棱长为 a的正方体 ABCD -A1B1C1D1,则( 1 )各棱在平面 AB1D1上的射影长之和为 ;( 2 )各棱与平面 AB1D1所成角之和为;( 3)各面在平面 AB1D1上的射影的面积之和为 ;( 4 )各面与平面 AB1D1所成角之和为.3.( 1 )在实数集 R上定义的函数 f( x) ,对任意α,β有f (α) f (β) =f ( α β2 ) f ( α -β2 ) ,且　 f ( 1 ) =2 ,f ( x) 2 ,则满足条件的一个函数是 .( 2 )已知 f ( x)…     

关于近于凸函数类的一个扩展

设f(z)在单位圆盘D={|z|<1}上解析且f(0)=f′(0)-1=0,记所有满足上述条件的f(z)所成集合为A.对α∈[0,1],令 P(α)={p(z)|p(z)在D中解析且P(0)=1,Rep(z)>α,z∈D}, C={f(z)|f(z)∈A且存在φ(z)∈K(0)使Re(f′(z)/φ′(z)>0,z∈D}。     

Bloch型空间上广义Cesàro算子的本性模(英文)

The Bloch-type space Bω consists of all functions f ∈ H(B) for which||f||Bω=sup/z∈Bω(z)|▽f(z)|< ∞.Let T be the extended Ces`aro operator with holomorphic symbol . The essential norm of T as an operator from Bω to Bμ is denoted by ||T||e,B ω→Bμ . The purpose of this paper is to prove that, for ω, μ normal and ∈H(B)||T||e,B ω→Bμ■ lim sup|z|→1 μ(z)|■ (z)|∫ |z| 0 dt ω(t) .     

An improvement of Ozaki’s P-valent conditions

The old result due to[Ozaki,S.:On the theory of multivalent functions Ⅱ.Sci.Rep.Tokyo Bunrika Daigaku Sect.A,45-87(1941)],says that if f(z) = z~p + ∑_(n=p+1~(a_nz~n))~∞ is analytic in a convex domain D and for some real α we have Re{exp(iα)f~((p))(z)} 0 in D,then f(z) is at most p-valent in ED.In this paper,we consider similar problems in the unit disc B = {z ∈ C:|z| 1}.     

解析函数与Lipschitz条件

研究了解析函数与Lipschitz条件,得到了如下两个结果:(i)设D是一平面区域,f(z)在D中解析,00,对任意z∈D有|f′(z)|≤md(z,D)k-1,则f∈Lipk(D)且‖f‖k≤cmk,其中c=c(D)是仅与D有关的常数.     

Direct and Reverse Carleson Conditions on Generalized Weighted Bergman-Orlicz Spaces

Let ■ be the open unit disk in the complex plane ■.For α-1,let dA_α(z)=(1+α)1-|z|~2αd A(z) be the weighted Lebesgue measure on ■.For a positive function ω∈L~1(■,dA_α),the generalized weighted Bergman-Orlicz space A_ω~ψ(■,dA_α)isthe space of all analytic functions such that ||f||_ω~ψ=∫_■ψ(|f(z)|)ω(z)dA_α(z)∞,where ψ is a strictly convex Orlicz function that satisfies other technical hypotheses.Let G be a measurable subset of ■,we say G satisfies the reverse Carleson condition for A_ω~ψ(■,dA_α) if there exists a positive constant C such that ∫_Gψ(|f(z)|)ω(z)dA_α(z)≥C∫_■ψ(|f(z)|)ω(z)dA_α(z),for all f∈A_ω~ψ(■,dA_α).Let μ be a positive Borel measure,we say μ satisfies the direct Carleson condition if there exists a positive constant M such that for all f∈A_ω~ψ(■,dA_α),∫_■ψ(|f(z)|)dμ(z)≤M∫_■ψ(|f(z)|)ω(z)dA_α(z).In this paper,we study the direct and reverse Carleson condition on the generalized weighted Bergman-Orlicz space A_ω~ψ(■,dA_α).We present conditions on the set G such that the reverse Carleson condition holds.Moreover,we give a sufficient conditionfor the finite positive Borel measureμto satisfy the direct carleson condition on the generalized weighted Bergman-Orlicz spaces.