ordinal number of the second class

The concepts of the first-class number and the second-class number were introduced,and the conversions and properties of those two classes were dealt with,which came to a new conclusion.

从基本定理出发,推广了P-进制计数法,建立了广义P-进制系统,引入了第一类数、第二类数的概念,探讨了两者之间的转换关系以及性质,得到了新的结论,给出了应用举例。