Category:Disjoint Permutations
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This category contains results about Disjoint Permutations.
Definitions specific to this category can be found in Definitions/Disjoint Permutations.
Let $S_n$ denote the symmetric group on $n$ letters.
Let $\pi, \rho \in S_n$ both be permutations on $S_n$.
Then $\pi$ and $\rho$ are disjoint if and only if:
- $(1): \quad i \notin \Fix \pi \implies i \in \Fix \rho$
- $(2): \quad i \notin \Fix \rho \implies i \in \Fix \pi$
That is, each element moved by $\pi$ is fixed by $\rho$ and (equivalently) each element moved by $\rho$ is fixed by $\pi$.
That is, if and only if their supports are disjoint sets.
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