<正>We give a systematic account of results which assure positivity and bounded- ness of partial sums of cosine or sine ......

在去心单位圆盘E={z：0〈｜z｜〈1}内,利用线性算子Lp（a,c）定义亚纯多叶函数的子类Ωp（a,c;A,B）基础上,定义了亚纯多叶函数的邻域概念,研究了......