摘要
通过对有限制条件的可重复排列数的讨论,得到求无重复排列数的序数的另一种计算方法.
The calculatig method and application about ordinal of being duplicated permutable number with constrained condition are aproached.
出处
《甘肃教育学院学报(自然科学版)》
1999年第4期20-22,共3页
Journal of Gansu Education College(Natural Science Edition)
关键词
条件
可重复排列
序数
映射
反序
condition
being duplicated
ordindal
mapping
antithetic