arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.4945math.AGmath.CO
收藏

高指数自反多面体与数12

Reflexive polytopes of higher index and the number 12

Alexander M Kasprzyk, Benjamin Nill

摘要:

我们引入自反多面体的指数l作为一个自然的推广的概念的自反多面体的指数1。这些l-自反多面体也表现为对偶对。在第二个维度,我们表明,它们产生自反多边形通过底层晶格的变化。这使我们能够有效地分类所有同构类的l-自反多边形索引200。作为另一个应用,我们证明了任意指数的自反多边形都满足著名的“数字12”性质。这是一个新的,无限类的晶格多边形拥有这一属性,并扩展了以前已知的16个实例。数字12的性质也更普遍地适用于l-自反非凸或自相交多边形环。最后,我们讨论高维的例子和开放的问题。

英文摘要:

We introduce reflexive polytopes of index l as a natural generalisation of the notion of a reflexive polytope of index 1. These l-reflexive polytopes also appear as dual pairs. In dimension two we show that they arise from reflexive polygons via a change of the underlying lattice. This allows us to efficiently classify all isomorphism classes of l-reflexive polygons up to index 200. As another application, we show that any reflexive polygon of arbitrary index satisfies the famous "number 12" property. This is a new, infinite class of lattice polygons possessing this property, and extends the previously known sixteen instances. The number 12 property also holds more generally for l-reflexive non-convex or self-intersecting polygonal loops. We conclude by discussing higher-dimensional examples and open questions.

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。

↑