正项级数敛散性的一种判别法

Judgment of Convergence and Divergence on Positive Sign Series

给出一种判别正项级数收敛或发散的方法，它优于通常所用的达朗贝尔（D′Alembert）判刑法。

A judgment method of convergence or divergence on positive sign series is given. It is better than D'Alembert method.