Mathematics – Combinatorics
Scientific paper
2008-06-12
Mathematics
Combinatorics
A much stronger result was obtained earlier by Seress. His result is now cited. Since my methods might be of some interest, I
Scientific paper
Let $G$ be a permutation group acting on a set $V$. A partition $\pi$ of $V$
is distinguishing if the only element of $G$ that fixes each cell of $\pi$ is
the identity. The distinguishing number of $G$ is the minimum number of cells
in a distinguishing partition. We prove that if $G$ is a primitive permutation
group and $|V|\ge336$, its distinguishing number is two.
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