descending power series

The comparison creterion and the cauchy one were obtained,based on the degree A(n),of monotone decreasing series,which was similar to that of the positive term series.

根据单调递减级数的阶A(n),得出类似于正项级数的比较判别法和根值判别法,用于判定较复杂的单调递减级数的收敛性。