This paper is mainly about recognizing convergence with the methods of infinitesimalequivalence in the limit form of convergence criterion in series of positive terms .
文章着重介绍了在正项级数比较审敛法的极限形式中，用等价无穷小的方法来判别正项级数的敛散性。
2
Getting limit with substitution of equivalenceinfinitesimal is a common, convenient and efficient way.