Why are Even and Odd permutations well-defined?
89474
every permutation is either even or odd,but not both
20722
Fixed points in random permutation
60416
Finding a permutation, and number of, from powers of the permutation
133436
Inclusion-Exclusion: INTELLIGENT permutations
47223
Deriving even odd function expressions
37331
Prove that every set with more than one element has a permutation without fixed points
98313
Number of possible permutations of n1 1's, n2 2's, n3 3's, n4 4's such that no two adjacent elements are same?
106603
How to tell if an array is a permutation in O(n)?
99634
$\binom{n}{1},\binom{n}{2},\ldots ,\binom{n}{n-1}$ are all even numbers.
19101
Permutation induced by a partition
146386
Is there a reason why the number of non-isomorphic graphs with $v=4$ is odd?
38809
In how many ways can the letters of word $PERMUTATIONS$ be arranged if there are always 4 letters between P and S?
24212
proving how many permutations exist.
75229
Can there be a function that's even and odd at the same time?
94570
Proof that every odd integer is a difference of two squares
115934
What is the parity of permutation in the 15 puzzle?
140630
Permutations in JavaScript?