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fixed points of permutations (thing)
See all of fixed points of permutations
, no other writeups in this node.
(
thing
)
by
ariels
Wed Aug 30 2000 at 10:49:40
There are
n
!
permutation
s on
n
element
s.
The number of "
derangement
s" (permutations with no
fixed point
s) is the closest
integer
to
n
!/
e
; see
counting derangements
.
If we select a permutation uniformly at
random
,
the average number of fixed points of a permutation is 1
.
the average number of fixed points of a permutation is 1
derangement
counting derangements
Who shall we eat?
Permutations with no fixpoints
balanced function
Counting proof that there are infinitely many prime numbers
fixed point
Poisson distribution
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