English
Related papers

Related papers: A normality criterion generalizing Gu's result

200 papers

In this paper, we first generalize a value distribution result of Lahiri and Dewan [4] and as an application of this result we prove a normality criterion using partial sharing of small functions. Further, in sequel normality criteria of Hu…

Complex Variables · Mathematics 2014-12-30 K. S. Charak , Shittal Sharma

We improve well-known results concerning normal families and shared values of meromorphic functions in the plane. In particular, we obtain two corollaries concerning meromorphic functions $f \colon {\mathbb C} \to {\widehat{\mathbb C}}$: i)…

Complex Variables · Mathematics 2026-03-18 Andreas Sauer

In this paper, we prove some value distribution results which lead to some normality criteria for a family of analytic functions. These results improve some recent results.

Complex Variables · Mathematics 2021-01-05 Sudip Saha , Bikash Chakraborty

In this paper, we continue to discuss normality based on a single\linebreak holomorphic function. We obtain the following result. Let $\CF$ be a family of functions holomorphic on a domain $D\subset\mathbb C$. Let $k\ge2$ be an integer and…

Complex Variables · Mathematics 2011-11-08 Xiaojun Liu , Shahar Nevo

Let ${\cal F}$ be a family of meromorphic functions on a domain $D$. We present a quite general sufficient condition for ${\cal F}$ to be a normal family. This criterion contains many known results as special cases. The overall idea is that…

Complex Variables · Mathematics 2017-10-17 Andreas Schweizer

We consider a family $\mathscr{F}$ of meromorphic functions defined in a domain $D$, a holomorphic function $\psi$ and a homogeneous differential polynomial $ P[f] $ of degree $d$ with weight $w$. In this paper, we prove the normality of…

Complex Variables · Mathematics 2026-03-13 Kuntal Mandal , Bipul Pal

In the present paper, we introduced the extended bicomplex plane $\bar{\mathbb{T}}$, its geometric model: the bicomplex Riemann sphere, and the bicomplex chordal metric that enables us to talk about the convergence of the sequences of…

Complex Variables · Mathematics 2011-05-24 K. S. Charak , D. Rochon , N. Sharma

Let $\mathcal{F}\subset\mathcal{M}(D)$ and let $a, b$ and $c$ be three distinct complex numbers. If, there exist a holomorphic function $h$ on $D$ and a positive constant $\rho$ such that for each $f\in\mathcal{F},$ $f$ and $f^{'}$…

Complex Variables · Mathematics 2024-11-11 Kuldeep Singh Charak , Manish Kumar , Anil Singh

In this paper, we prove a normal criteria for family of meromorphic functions. As an application of that result, we establish a uniqueness theorem for entire function concerning a conjecture of R. Bruck. The above uniqueness theorem is an…

Complex Variables · Mathematics 2017-01-19 Nguyen Van Thin , Ha Tran Phuong

The object of the present paper is to obtain a more general condition for univalence of meromorphic functions in the U*. The significant relationships and relevance with other results are also given. A number of known univalent conditions…

Complex Variables · Mathematics 2015-09-21 Erhan Deníz , Halit Orhan

In this paper, we will consider normality and uniqueness property of a family $\mathcal{F}$ of meromorphic functions when $[Q(f)]^{(k)}$ and $[Q(g)]^{(k)}$ share $\alpha$ ignoring multiplicities, for any $f,g\in \mathcal{F}$, where $Q$ is a…

Complex Variables · Mathematics 2019-12-17 Nguyen Viet Phuong

We extend the fundamental normality test due to Carath\'eodory in the sense of shared functions.

Complex Variables · Mathematics 2010-10-25 Jürgen Grahl , Shahar Nevo

In this paper, we prove some results in normal family of meromorphic mappings intersecting with moving hypersurfaces. As some applications, we establish some results for normal mapping and extension of holomorphic mappings. A our result is…

Complex Variables · Mathematics 2020-02-18 Nguyen Van Thin , Wei Chen

In the paper, concerning a question of Yi [23], we study general criterion for the uniqueness of an L-function and a general meromorphic function. Our results improve and extend all the existing results in this direction [23, 18, 17, 4] to…

Complex Variables · Mathematics 2025-12-22 Sanjay Mallick , Ripan Saha

Schwick, in [6], states that let $\mathcal{F}$ be a family of meromorphic functions on a domain $D$ and if for each $f\in\mathcal{F}$, $(f^n)^{(k)}\neq 1$, for $z\in D$, where $n, k$ are positive integers such that $n\geq k+3$, then…

Complex Variables · Mathematics 2024-02-20 Gopal Datt , Sanjay Kumar

In this paper we prove the result: Let $\mathcal{F}$ be a family of meromorphic functions on a domain $\Omega$ such that every pair of members of $\mathcal{F}$ shares a set $S:=\left\{\psi_1(z), \psi_2(z), \psi_3(z) \right\}$ in $\Omega$,…

Complex Variables · Mathematics 2015-09-22 Kuldeep Singh Charak , Virender Singh

We establish a criterion for local boundedness and hence normality of a family $\F$ of analytic functions on a domain $D$ in the complex plane whose corresponding family of derivatives is locally bounded. Furthermore we investigate the…

Dynamical Systems · Mathematics 2013-03-01 Dinesh Kumar , Sanjay Kumar

This paper is devoted to the uniqueness problem of the power of a meromorphic function with its differential polynomial sharing a set. Our result will extend a number of results obtained in the theory of normal families. Some questions are…

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

In this paper, we extend a result of Schwick concerning normality and sharing values in one complex variable for families of holomorphic curves taking values in $\mathbb{P}^n$. We consider wandering moving hyperplanes (i.e., depending on…

Complex Variables · Mathematics 2024-10-18 Gopal Datt , Naveen Gupta , Nikhil Khanna , Ritesh Pal

In this paper we study the normality of monomial ideals using linear programming and graph theory. We give normality criteria for monomial ideals, for ideals generated by monomials of degree two, and for edge ideals of graphs and clutters…

Commutative Algebra · Mathematics 2024-02-09 Luis A. Dupont , Humberto Muñoz-George , Rafael H. Villarreal