研究了无穷级亚纯函数的Borel方向,得到了一个充分必要条件,另外,还联系到零点聚值线给出无穷级亚纯函数的Borel方向存在的一个充分条件.
This paper explores the problems occurred in the Borel direction of infinity order of meromorphic function, and obtains a suffiecent and necessary conditions. In addition, the paper relates the zero accumulative lines and gives a suffiecent condition of infinity order Borel direction .