A series in which the sign alternates between positive and negative, i.e. any series in the form an = (−1)n pn or (−1)n−1 pn where all pn > 0 for all n.
科学参考收录了60776条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。