Abstract
Let $D_n \subseteq \Sigma_n$ be the set of derangements in the symmetric group. We prove that the complex of injective words generated by $\Sigma_n \setminus D_n$ is contractible. This gives a conceptual explanation to the well known fact that the complex of injective words generated by $\Sigma_n$ is homotopy equivalent to the wedge sum $\underset{|D_n|}{\bigvee} S^{n-1}$.
Original language | English |
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Publisher | ArXiv |
Number of pages | 14 |
DOIs | |
Publication status | Published - 13 Sept 2023 |
Keywords
- math.CO
- math.AT
- 05e45