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arXiv math/0301369math.DGmath.SP
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紧致黎曼流形上调和形式的长度

The Length of Harmonic Forms on a Compact Riemannian Manifold

Paul-Andi Nagy, Constantin Vernicos

摘要:

本文研究了具有常长调和形式且第一贝蒂数等于$n-1$的$n$维Riemann流形,证明了它们是具有某些特殊度量的2步幂零流形.根据调和形式乘积的性质,我们还讨论了其中的左不变度量。这使我们能够澄清的情况下,平等的稳定isosytolic不平等的设置。我们还讨论了贝蒂数的其他值。

英文摘要:

We study $n$ dimensional Riemanniann manifolds with harmonic forms of constant length and first Betti number equal to $n-1$ showing that they are 2-steps nilmanifolds with some special metrics. We also characterise, in terms of properties on the product of harmonic forms, the left invariant metrics among them. This allows us to clarify the case of equality in the stable isosytolic inequalities in that setting. We also discuss other values of the Betti number.

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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