Meromorphic functions of finite φ-order and linear q-difference equations

Meromorphic functions of finite φ-order and linear q-difference equations
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有限 Ï 阶和线性 q 差分方程的亚纯函数

DOI:
10.1080/10236198.2021.1982919
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发表时间:
2021-09
期刊:
Journal of Difference Equations and Applications
影响因子:
--
通讯作者:
Y. Hui
Y. Hui
中科院分区:
其他
文献类型:
--
作者:
J. Heittokangas;J. Wang;Z. T. Wen;Y. Hui

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φ阶在2009年被引入到单位圆盘上的亚纯函数中,并被用来作为线性微分方程解的增长指标。本文利用φ级来研究复平面上亚纯函数的性质,它度量了函数在经典级和对数级之间的增长性。利用φ阶和φ收敛指数讨论了亚纯函数的值分布的几个结果。在复平面上的应用不再是线性微分方程组,而是线性Q-差分方程组。
The φ-order was introduced in 2009 for meromorphic functions in the unit disc, and was used as a growth indicator for solutions of linear differential equations. In this paper, the properties of meromorphic functions in the complex plane are investigated in terms of the φ-order, which measures the growth of functions between the classical order and the logarithmic order. Several results on value distribution of meromorphic functions are discussed by using the φ-order and the φ-exponent of convergence. Instead of linear differential equations, the applications in the complex plane lie in linear q-difference equations.
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