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arXiv 1209.5495math.FAmath.GT
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$S^n$的移动有限单元紧框架

Moving finite unit tight frames for $S^n$

Daniel Freeman, Ryan Hotovy, Eileen Martin

摘要:

$\R^n$的框架可以被认为是冗余的或线性相关的坐标系,并且在诸如信号处理、数据压缩和采样理论等领域中具有重要的应用。“框架”一词在微分几何和拓扑学中有不同的含义。光滑流形的切丛的移动标架是在流形上光滑变化的每个点处的切空间的基础。众所周知,只有$S^1$、$S^3$和$S^7$是切丛有移动基的球面。另一方面,在结合了“框架”一词的两种不同含义之后,我们证明了$n$维球面$S^n$的切丛有一个移动的有限单位紧框架当且仅当$n$是奇数.给出了在$S^{2n-1}$上对所有$n\in\N$建立向量场的过程,并精确刻画了当这些向量场的集合形成一个移动的有限单位紧框架时的性质.

英文摘要:

Frames for $\R^n$ can be thought of as redundant or linearly dependent coordinate systems, and have important applications in such areas as signal processing, data compression, and sampling theory. The word "frame" has a different meaning in the context of differential geometry and topology. A moving frame for the tangent bundle of a smooth manifold is a basis for the tangent space at each point which varies smoothly over the manifold. It is well known that the only spheres with a moving basis for their tangent bundle are $S^1$, $S^3$, and $S^7$. On the other hand, after combining the two separate meanings of the word "frame", we show that the $n$-dimensional sphere, $S^n$, has a moving finite unit tight frame for its tangent bundle if and only if $n$ is odd. We give a procedure for creating vector fields on $S^{2n-1}$ for all $n\in\N$, and we characterize exactly when sets of such vector fields form a moving finite unit tight frame.

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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