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Entire functions that share two pairs of small functions
Open Mathematics ( IF 1.7 ) Pub Date : 2021-01-01 , DOI: 10.1515/math-2021-0011
Xiaohuang Huang 1 , Bingmao Deng 2 , Mingliang Fang 1
Affiliation  

In this paper, we study the unicity of entire functions and their derivatives and obtain the following result: let f f be a non-constant entire function, let a 1 {a}_{1} , a 2 {a}_{2} , b 1 {b}_{1} , and b 2 {b}_{2} be four small functions of f f such that a 1 ≢ b 1 {a}_{1}\not\equiv {b}_{1} , a 2 ≢ b 2 {a}_{2}\not\equiv {b}_{2} , and none of them is identically equal to ∞ \infty . If f f and f ( k ) {f}^{\left(k)} share ( a 1 , a 2 ) \left({a}_{1},{a}_{2}) CM and share ( b 1 , b 2 ) \left({b}_{1},{b}_{2}) IM, then ( a 2 − b 2 ) f − ( a 1 − b 1 ) f ( k ) ≡ a 2 b 1 − a 1 b 2 \left({a}_{2}-{b}_{2})f-\left({a}_{1}-{b}_{1}){f}^{\left(k)}\equiv {a}_{2}{b}_{1}-{a}_{1}{b}_{2} . This extends the result due to Li and Yang [ Value sharing of an entire function and its derivatives , J. Math. Soc. Japan. 51 (1999), no. 7, 781–799].

中文翻译:

共享两对小型函数的整个函数

在本文中,我们研究了整个函数及其导数的唯一性,并得到以下结果:令ff为非恒定的整体函数,令1 {a} _ {1},2 {a} _ {2} ,b 1 {b} _ {1}和b 2 {b} _ {2}是ff的四个小函数,使得a 1≢b 1 {a} _ {1} \ not \ equiv {b} _ { 1},a 2 2 b 2 {a} _ {2} \ not \ equiv {b} _ {2},它们都不等于∞\ infty。如果ff和f(k){f} ^ {\ left(k)}共享(a 1,a 2)\ left({a} _ {1},{a} _ {2})CM并共享(b 1,b 2)\ left({b} _ {1},{b} _ {2})IM,然后(a 2-b 2)f-(a 1-b 1)f(k)≡a 2 b 1 − a 1 b 2 \ left({a} _ {2}-{b} _ {2})f- \ left({a} _ {1}-{b} _ {1}){f} ^ {\ left(k)} \ equiv {a} _ {2} {b} _ {1}-{a} _ {1} {b} _ {2}。由于Li和Yang [整个函数及其派生的价值共享,J。Math。Soc。日本。51(1999),no。7,781–799]。
更新日期:2021-01-01
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