Permutation Variants Calculator
Compute even, odd, and circular permutations from the size of a set.
Definitions
- Even permutation — reachable from the identity using an even number of transpositions (swaps). Half of all permutations are even.
- Odd permutation — reachable using an odd number of transpositions. The other half (when n ≥ 2).
- Circular permutation — distinct arrangements around a circle, where rotations are considered the same. Equals (n − 1)!.