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arXiv 1804.04547math.AT
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$A_n^2$ -多面体的自同伦等价群

The group of self-homotopy equivalences of $A_n^2$-polyhedra

Cristina Costoya, David Méndez, Antonio Viruel

摘要:

设$X$是有限型$A_n^2$ -多面体,$n \geq 2$ .本文研究商群$\mathcal{E}(X)/\mathcal{E}_*(X)$,其中$\mathcal{E}(X)$是$X$的自同伦等价群,$\mathcal{E}_*(X)$是诱导$X$的同调群上的恒等式的自同伦等价子群.我们表明,不是每个组可以实现为$\mathcal{E}(X)$或$\mathcal{E}(X)/\mathcal{E}_*(X)$的$X$的$A_n^2$ -多面体,$n\ge 3$,并获得具体的结果为$n=2$。

英文摘要:

Let $X$ be a finite type $A_n^2$-polyhedron, $n \geq 2$. In this paper we study the quotient group $\mathcal{E}(X)/\mathcal{E}_*(X)$, where $\mathcal{E}(X)$ is the group of self-homotopy equivalences of $X$ and $\mathcal{E}_*(X)$ the subgroup of self-homotopy equivalences inducing the identity on the homology groups of $X$. We show that not every group can be realised as $\mathcal{E}(X)$ or $\mathcal{E}(X)/\mathcal{E}_*(X)$ for $X$ an $A_n^2$-polyhedron, $n\ge 3$, and specific results are obtained for $n=2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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