给出离散变量的灵敏度之定义，且通过变量的灵敏度分析无穷大量的阶，从而判断常数项级数的敛散性。

This article defines the sensitivity of dispersed variable. And we can use it to analyze the order of a infinite and judge the convergence of a constant term series.

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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。

This paper is mainly about recognizing convergence with the methods of infinitesimal equivalence in the limit form of convergence criterion in series of positive terms .

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对已有交错级数的敛散性的判别法加以了综合、比较，结合交错级数自身的特性，给出了交错级数敛散性的一个判别模式。

On the current existing discriminance, aimed to provide students with good ideas, a judgment mode of convergence or divergence of interlock series has been set out after comparison and analysis.

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