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arXiv math/0608275math.DGmath.AP
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(2n+1)-球面上切触定常Legendrian子流形的等变胶合构造

Equivariant Gluing Constructions of Contact Stationary Legendrian Submanifolds of the (2n+1)-Sphere

Adrian Butscher

摘要:

$S^{2n+1}$的接触平稳勒让德子流形是在接触变形下体积平稳的勒让德子流形。最简单的接触平稳勒让德子流形(实际上是极小的和勒让德的)是实的赤道$n$ -球面$S_0$。本文给出了一种构造$S^{2n+1}$的接触稳定(但不是极小)Legendrian子流形的方法,该方法是通过将$S_0$的足够多个$U(n+1)$ -旋转副本在适当的横截相交的孤立点处粘在一起.由此产生的子流形是非常对称的;在几何上类似于$S_0$的副本通过窄颈相互连接的“项链”,并在$S^{2n + 1}$周围缠绕了大量的时间,然后在自身上闭合;并且在拓扑上等价于$S^1 \times S^{n-1}$。此外,它们代表了$S^{2n + 1}$的接触定常嵌入子流形的全新例子,从而产生了$C^{n+1}$中嵌入Hamilton定常锥的全新例子。

英文摘要:

A contact stationary Legendrian submanifold of $S^{2n+1}$ is a Legendrian submanifold whose volume is stationary under contact deformations. The simplest contact stationary Legendrian submanifold (actually minimal and Legendrian) is the real, equatorial $n$-sphere $S_0$. This paper develops a method for constructing contact stationary (but not minimal) Legendrian submanifolds of $S^{2n+1}$ by gluing together configurations of sufficiently many $U(n+1)$-rotated copies of $S_0$ at isolated points of suitably transverse intersection. The resulting submanifolds are very symmetric; are geometrically akin to a `necklace' of copies of $S_0$ attached to each other by narrow necks and winding a large number of times around $S^{2n + 1}$ before closing up on itself; and are topologically equivalent to $S^1 \times S^{n-1}$. Moreover, they represent wholly new examples of contact stationary embedded submanifolds of $S^{2n + 1}$ and thus give rise to wholly new examples of embedded Hamiltonian stationary cones in $C^{n+1}$.

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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