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arXiv 0709.2215math.GT
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2分量链接的度量

Measure of a 2-component link

Jun O'Hara

摘要:

一个二分量链接产生一个环面作为三个球体的两点配置空间中的分量节点的乘积。这个空间可以用余切丛和不定格拉斯曼丛来标识。我们表明,集成的绝对值的典型辛形式是等于面积的环面相对于伪黎曼结构,它达到最低限度,只有在“最佳”的霍普夫链接。

英文摘要:

A two-component link produces a torus as the product of the component knots in a two-point configuration space of a three-sphere. This space can be identified with a cotangent bundle and also with an indefinite Grassmannian. We show that the integration of the absolute value of the canonical symplectic form is equal to the area of the torus with respect to the pseudo-Riemannian structure, and that it attains the minimum only at the "best" Hopf links.

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