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1.
研究零级亚纯函数与多项式的复合函数的对数导数引理.作为其应用,我们获得了零级亚纯函数与多项式复合函数的Nevanlinna特征和第二基本定理.  相似文献   

2.
运用正规族理论研究了整函数与其高阶导数分担无穷级函数增长级与超级的相关结果.从亚纯函数超级大于零而使球面导数无界的角度出发,然后综合运用Pang-Zaclman引理,数学归纳法和Nevanlinna理论等方法证明了该结果,推广和改进了已有的结果.  相似文献   

3.
首先将亚纯函数的球面导数这个概念推广至更一般的形式即涉及亚纯函数的高阶导数的形式,然后利用著名的Zalcman引理和推广的球面导数研究了单位圆上亚纯函数族的正规定则和一致正规定则.所得的定理推广了Lappan五值定理和Marty准则,并改进了关于正规函数和正规族的一些已知结果.  相似文献   

4.
杨乐 《中国科学A辑》1982,25(3):193-202
本文研究了有穷正级亚纯函数及其导数的重值,例外函数与Borel方向间的关系。  相似文献   

5.
关于亚纯函数及其导数的Borel方向   总被引:1,自引:0,他引:1  
亚纯函数及其导数的Borel方向之间有密切关系,本文运用Nevanlinna理论证明有穷正级亚纯函数f(z)的Borel方向也是f'(z)或(zf(z))'或(z 1)f(z))'的Borel方向.  相似文献   

6.
韩俊锋  邱淦弟 《数学研究》2010,43(3):309-314
进一步讨论亚纯函数的k阶导数具有公共小函数的唯一性问题,得到两个亚纯函数唯一性问题的结果,改进了李平的有关结果.  相似文献   

7.
为进一步丰富亚纯函数唯一性理论,寻求更佳的唯一性条件,利用亚纯函数Nevanlinna理论更精确地估计亚纯函数的n重值点的计数函数,得到两个亚纯函数与其导数具有某些分担值时的唯一性定理,推广和改进了相关文献的相关结果.  相似文献   

8.
为了进一步丰富圆环上亚纯函数的唯一性理论,寻找更好的唯一性条件,本文研究了圆环上重值及亏量对亚纯函数唯一性的影响,得到两个圆环上亚纯函数与其导数涉及重值及亏量的唯一性定理,所得结果丰富了圆环上亚纯函数的唯一性理论.  相似文献   

9.
本文结合广义的Nevanlinna亏量,将通常意义下有限级亚纯函数的Borel例外值定理推广到p阶正级的亚纯函数的情形.  相似文献   

10.
张广厚 《数学学报》1977,20(3):157-177
<正> 本文主要改进了庄圻泰的结果,证明了有穷正级亚纯函数若以一个有穷值作为波莱耳例外值,则函数的每条波莱耳方向也是其各级导数的波莱耳方向.  相似文献   

11.
研究了一类亚纯函数为系数的二阶非齐次线性微分方程的解及其微分多项式和小函数的关系,并得到了这类微分方程解以及解的一阶,二阶导数与微分多项式的不动点性质.  相似文献   

12.
涉及零点重数的亚纯函数的值分布   总被引:20,自引:0,他引:20  
王跃飞  方明亮 《数学学报》1998,41(4):743-748
本文研究涉及零点重数的亚纯函数的值分布,证明了几个一般的模分布定理及相应的亚纯函数族的正规定则.  相似文献   

13.
Picard values and normal families of meromorphic functions with multiple zeros   总被引:18,自引:0,他引:18  
In this paper, general modular theorems are obtained for meromorphic functions and their derivatives. The related criteria for normality of families of meromorphic functions are proved. Research supported by the National Science Foundation of China  相似文献   

14.
On transcendental meromorphic functions with radially distributed values   总被引:13,自引:0,他引:13  
The growth of transcendental meromorphic functions in terms of their ordersis investigated in this paper when they and their derivatives have radially distributed valuesfollowing the discussion of the author. A simple and elementary way to study such subjectsis exhibited in this paper; that is, once an estimation of B(r, *) in terms of a few c(r, **) inthe Nevanlinna theory on angular domains is established, we can produce one result thatthe order of a mermorphic function with radially distributed values related to C(r, **) canbe estimated under the assumption of existence of suitable deficient value. The results ob-tained in this paper lead us to a new singular direction in terms of Nevanlinna charactersticinstead of the order of meromorphic functions.  相似文献   

15.
In this paper, we first obtain the famous Xiong Inequality of meromorphic functions on annuli. Next we get a uniqueness theorem of meromorphic function on annuli concerning to their multiple values and derivatives by using the inequality.  相似文献   

16.
We prove some results concerning functions ? meromorphic of finite lower order in the plane, such that ??″?α(?′)2 has few zeros, where α is a constant, using in part new estimates for the multipliers at fixpoints of certain functions. We go on to consider zeros of derivatives and the minimal lower growth of meromorphic functions with finitely many critical values.  相似文献   

17.
We study the behaviour of the sequence of successive derivatives of meromorphic functions at points of the so-called final set. We prove that, whereas in many cases this sequence tends to ∞, for a special class of meromorphic functions, it may have extremely wild behaviour. We also prove a connection between the derivatives of meromorphic functions from this class and so-called Dirichlet sets.  相似文献   

18.
In this paper,we define the shared value of an algebroid function and its derivative on its Riemann surface.By considering the relationship between the shared values and the branch points of algebroid functions and their derivatives,we obtain some uniqueness theorems of algebroid functions sharing values with their derivatives,which extend 3 IM shared values theorem of nonconstant meromorphic functions and their derivatives obtained by Mues-Steinmetz and Gundersen.  相似文献   

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