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The minimal length product over homology bases of manifolds
Mathematische Annalen ( IF 1.4 ) Pub Date : 2021-01-25 , DOI: 10.1007/s00208-021-02150-5
Florent Balacheff , Steve Karam , Hugo Parlier

Minkowski’s second theorem can be stated as an inequality for n-dimensional flat Finsler tori relating the volume and the minimal product of the lengths of closed geodesics which form a homology basis. In this paper we show how this fundamental result can be promoted to a principle holding for a larger class of Finsler manifolds. This includes manifolds for which first Betti number and dimension do no necessarily coincide, a prime example being the case of surfaces. This class of manifolds is described by a non-vanishing condition for the hyperdeterminant reduced modulo 2 of the multilinear map induced by the fundamental class of the manifold on its first \(\mathbb {Z}_2\)-cohomology group using the cup product.



中文翻译:

流形同源基上的最小长度乘积

闵可夫斯基第二定理可以说成n维平面Finsler花托的不等式,它关系到封闭测地线的体积和长度的最小乘积,形成了一个同源性基础。在本文中,我们展示了如何将此基本结果提升为适用于更大类Finsler流形的原理。这包括歧管,其第一个贝蒂数和尺寸不一定要重合,主要的例子是表面。此类流形是通过杯形乘积的第一个\(\ mathbb {Z} _2 \)-同调性组上的流形基本类所诱导的多线性映射的超行列式还原模2的不消失条件来描述的。

更新日期:2021-01-28
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