partial sum;
cosine series;
sine series;
orthogonal polynomials;
D O I:
暂无
中图分类号:
O178 [不等式及其他];
学科分类号:
摘要:
We give a systematic account of results which assure positivity and bounded- ness of partial sums of cosine or sine series.New proofs of recent results are sketched.