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In this paper, we prove some normality criteria concerning transitivity of normality from one family of meromorphic functions to another which improve and generalize some recent results. We also prove some value distribution results for…

Complex Variables · Mathematics 2023-03-10 Kuldeep Singh Charak , Nikhil Bharti

In this paper we continue our earlier investigations on normal families of meromorphic functions\cite{CS2}. Here, we prove some value distribution results which lead to some normality criteria for a family of meromorphic functions involving…

Complex Variables · Mathematics 2015-09-25 Kuldeep Singh Charak , Shittal Sharma

We interpret a formula for meromorphic functions on foliations by Riemann surfaces as an analogue to the product formula of valuations in algebraic number theory.

Number Theory · Mathematics 2007-05-23 Fabian Kopei

In this paper, we study $q$-difference analogues of several central results in value distribution theory of several complex variables such as $q$-difference versions of the logarithmic derivative lemma, the second main theorem for…

Complex Variables · Mathematics 2020-11-25 Tingbin Cao , Risto Korhonen

We calculate a certain mean-value of meromorphic functions by using specific ergodic transformations, which we call affine Boolean transformations. We use Birkhoff's ergodic theorem to transform the mean-value into a computable integral…

Number Theory · Mathematics 2021-09-21 Junghun Lee , Ade Irma Suriajaya

In this paper, we prove some uniqueness results which improve and generalize several earlier works. Also, we prove a value distribution result concerning $f^{(k)}$ which provides a partial answer to a question of Fang and Wang [A note on…

Complex Variables · Mathematics 2014-12-30 Kuldeep Singh Charak , Banarsi Lal

We consider the zeros distributions on the derivatives of difference polynomials of meromorphic functions, and present some results which can be seen as the discrete analogues of Hayman conjecture \cite{hayman1}, also partly answer the…

Complex Variables · Mathematics 2011-07-06 Kai Liu , Xin-Ling Liu , Ting-Bin Cao

We prove the existence of the M-function, by which we can state the limit theorem for the value-distribution of the main term in the asymptotic formula for the summatory function of the Goldbach generating function.

Number Theory · Mathematics 2021-03-19 Kohji Matsumoto

We consider uniqueness results for meromorphic functions $f:{\mathbb C} \to \widehat{\mathbb C}$ such that for certain values $a\in {\mathbb C}$ the implication $f(z)=a \Rightarrow f'(z)=a$ holds, i.e. that $f$ and $f'$ share values {\it…

Complex Variables · Mathematics 2026-04-08 Andreas Sauer , Andreas Schweizer

Nevanlinna's second main theorem is a far-reaching generalisation of Picard's Theorem concerning the value distribution of an arbitrary meromorphic function f. The theorem takes the form of an inequality containing a ramification term in…

Complex Variables · Mathematics 2013-09-16 Rodney Halburd , Risto Korhonen

The aim of this paper is to consider the value distribution of a differential monomial generated by a transcendental meromorphic function.

Complex Variables · Mathematics 2018-12-06 Bikash Chakraborty

In this short manuscript, we will put some light on the different outcomes when two non-constant meromorphic functions share a value with prescribed weight two.

Complex Variables · Mathematics 2024-03-27 Sudip Saha , Amit Kumar Pal , Soumon Roy

A result is proved concerning meromorphic functions of finite order in the plane such that all but finitely many zeros of the second derivative are zeros of the first derivative.

Complex Variables · Mathematics 2013-06-20 J. K. Langley

In this paper we prove a number of results concerning uniqueness of a meromorphic function as well as its derivative sharing one or two sets. In particular, we deal with the specific question raised in [18], [19], [20] and ultimately…

Complex Variables · Mathematics 2022-09-15 Abhijit Banerjee , Bikash Chakraborty

Analogues of the key results of Wiman-Valiron theory are proved for a class of functions meromorphic in the unit disc, based on an approach developed by Bergweiler, Rippon and Stallard for the plane setting. The results give local…

Complex Variables · Mathematics 2013-09-05 J. K. Langley , John Rossi

We first briefly survey the value-distribution theory of L-functions of the Bohr-Jessen flavor (or the theory of "M-functions"). Limit formulas for the Riemann zeta-function, Dirichlet L-functions, automorphic L-functions etc. are…

Number Theory · Mathematics 2018-08-20 Kohji Matsumoto , Yumiko Umegaki

In this paper, we investigate the zero distributions of $q$-shift difference-differential polynomials of meromorphic functions with zero-order that extends and generalizes the classical Hayman results of the zeros of differential…

Complex Variables · Mathematics 2021-03-09 Goutam Haldar

The Lemma on the Logarithmic Derivative of a meromorphic function has many applications in the study of meromorphic functions and ordinary differential equations. In this paper, a difference analogue of the Logarithmic Derivative Lemma is…

Complex Variables · Mathematics 2007-05-23 R. G. Halburd , R. J. Korhonen

In the work, we focus on a conjecture due to Z.X. Chen and H.X. Yi[1] which is concerning the uniqueness problem of meromorphic functions share three distinct values with their difference operators. We prove that the conjecture is right for…

Complex Variables · Mathematics 2015-04-14 Feng Lü , Weiran Lü

We prove some uniqueness results for the Riemann zeta-function and the Euler gamma-function by virtue of shared values using the value distribution theory.

Complex Variables · Mathematics 2019-01-09 Qi Han , Jingbo Liu , Qiong Wang
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