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arXiv 1502.06377math.COmath.RT
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极根多面体是地带性拓扑

Polar Root Polytopes that are Zonotopes

Paola Cellini, Mario Marietti

摘要:

令$\mathcal P_Φ$是有限不可约结晶根系$Φ$的根多面体,即,$Φ$中所有根的凸包。$\mathcal P_Φ$的极线,记作$\mathcal P_Φ^*$,与基本凹穴在外尔群作用下的轨道的并集重合。在本文中,我们建立了哪些多面体$\mathcal P_Φ^*$是zonotopes,哪些不是。证据是建设性的。

英文摘要:

Let $\mathcal P_Φ$ be the root polytope of a finite irreducible crystallographic root system $Φ$, i.e., the convex hull of all roots in $Φ$. The polar of $\mathcal P_Φ$, denoted $\mathcal P_Φ^*$, coincides with the union of the orbit of the fundamental alcove under the action of the Weyl group. In this paper, we establishes which polytopes $\mathcal P_Φ^*$ are zonotopes and which are not. The proof is constructive.

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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