Results on entire and meromorphic solutions for several systems of quadratic trinomial functional equations with two complex variables

Author(s):  
Hong Yan Xu ◽  
Ye Yang Jiang
Axioms ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 126
Author(s):  
Hong Li ◽  
Hongyan Xu

This article is to investigate the existence of entire solutions of several quadratic trinomial difference equations f(z+c)2+2αf(z)f(z+c)+f(z)2=eg(z), and the partial differential difference equations f(z+c)2+2αf(z+c)∂f(z)∂z1+∂f(z)∂z12=eg(z),f(z+c)2+2αf(z+c)∂f(z)∂z1+∂f(z)∂z2+∂f(z)∂z1+∂f(z)∂z22=eg(z). We establish some theorems about the forms of the finite order transcendental entire solutions of these functional equations. We also list a series of examples to explain the existence of the finite order transcendental entire solutions of such equations. Meantime, some examples show that there exists a very significant difference with the previous literature on the growth order of the finite order transcendental entire solutions. Our results show that some functional equations can admit the transcendental entire solutions with any positive integer order. These results make a few improvements of the previous theorems given by Xu and Cao, Liu and Yang.


1999 ◽  
Vol 6 (4) ◽  
pp. 617-618 ◽  
Author(s):  
Walter Bergweiler ◽  
Katsuya Ishizaki ◽  
Niro Yanagihara

1998 ◽  
Vol 5 (3) ◽  
pp. 248-258 ◽  
Author(s):  
Walter Bergweiler ◽  
Katsuya Ishizaki ◽  
Niro Yanagihara

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Hong-Yan Xu ◽  
Jin-Lian Wang ◽  
Hua Wang

We investigate the existence of transcendental meromorphic solutions of some types of systems of complex functional equations and obtain some results about the existence of meromorphic solutions of such systems. Our results are improvement of the previous theorems given by Gao, Xu, and Zheng, and our examples show that our results are sharp to some extent.


1991 ◽  
Vol 44 (2) ◽  
pp. 263-269 ◽  
Author(s):  
Jianyong Qiao

Let f(z) be a meromorphic function; we shall investigate the asymptotic behaviour of the ratio T(r, f(z + α))/T(r, f(z)) and T(r, f(αz))/T(r, f(z)), and discuss the growth of the meromorphic solutions of some functional equations.


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