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arXiv · 1303.0016

Cardinality of Balls in Permutation Spaces

Liviu P. Dinu·Catalin Zara
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Abstract

For a right invariant distance on a permutation space $S_n$ we give a sufficient condition for the cardinality of a ball of radius $R$ to grow polynomially in $n$ for fixed $R$. For the distance $\ell_1$ we show that for an integer $k$ the cardinality of a sphere of radius $2k$ in $S_n$ (for $n \geqslant k$) is a polynomial of degree $k$ in $n$ and determine the high degree terms of this polynomial.

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Liviu P. Dinu, Catalin Zara. 2013-02-28. Cardinality of Balls in Permutation Spaces. https://arxiv.org/abs/1303.0016

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