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arXiv 0911.2644math.COmath.GR
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有穷级超映射运算

Hypermap operations of finite order

Gareth A. Jones, Daniel Pinto

摘要:

对偶性和手征性是超映射上2阶运算的例子。James证明了超映射和定向超映射上的所有运算的群都可以用群$Δ= C_2*C_2*C_2$和$Δ^+ = F_2$的外自同构群${\rm Out} Δ\cong PGL_2({\bf Z})$和${\rm Out} Δ^+\cong GL_2({\bf Z})$来标识。我们将考虑这两个群中的有穷级元素,以及它们所诱导的运算。

英文摘要:

Duality and chirality are examples of operations of order 2 on hypermaps. James showed that the groups of all operations on hypermaps and on oriented hypermaps can be identified with the outer automorphism groups ${\rm Out} Δ\cong PGL_2({\bf Z})$ and ${\rm Out} Δ^+\cong GL_2({\bf Z})$ of the groups $Δ= C_2*C_2*C_2$ and $Δ^+ = F_2$. We will consider the elements of finite order in these two groups, and the operations they induce.

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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