2009-10-05, 10:27
本人是mathematica小白，超白的那种，。现在在读一门概率课，课本身不是很难，但是老师特喜欢出mathematcia题。
以下就是一道题，请各位高手帮忙解答一下，然后好好看看到底要怎么做。
Using Mathematica, write a program that
counts the number of permutations of the set {1, 2, . . . , n} with fixed points. Print out
your code and the results of test-runs for n = 2, 5, 8.
万分感谢
以下就是一道题，请各位高手帮忙解答一下，然后好好看看到底要怎么做。
Using Mathematica, write a program that
counts the number of permutations of the set {1, 2, . . . , n} with fixed points. Print out
your code and the results of test-runs for n = 2, 5, 8.
万分感谢