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Forum URL: http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name: This and that
Topic ID: 129
Message ID: 2
#2, RE: playing with permutations...
Posted by alexb on Jul-31-01 at 11:22 PM
In response to message #1
e-1 is an approximation to the relative number of derangements, i.e. permutations that move all elements with no exceptions.