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arXiv 2402.03090math.FAmath.CAmath.CV
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拟平移不变空间中的采样与由指数多项式比值生成的Gabor框架

Sampling in quasi shift-invariant spaces and Gabor frames generated by ratios of exponential polynomials

Alexander Ulanovskii, Ilya Zlotnikov

AI总结:

本文引入两类具有周期性的整函数与亚纯函数生成元族,涵盖高斯与双曲正割情形,证明了分离集密度的尖锐采样定理,并应用于半正则格点的Gabor框架密度新结果。

摘要:

我们引入了两个生成元(函数)族$\mathcal{G}$,它们由整函数与亚纯函数组成,具有某种周期性性质,并包含经典的高斯生成元和双曲正割生成元。我们证明了关于分离集合密度的尖锐结果,这些分离集合为这些族中元素生成的平移不变空间和拟平移不变空间提供了非均匀采样。作为应用,我们获得了关于半正则格点密度的新的尖锐结果,这些格点用于由这些族中元素生成的Gabor框架。

英文摘要:

We introduce two families of generators (functions) $\mathcal{G}$ that consist of entire and meromorphic functions enjoying a certain periodicity property and contain the classical Gaussian and hyperbolic secant generators. Sharp results are proved on the density of separated sets that provide non-uniform sampling for the shift-invariant and quasi shift-invariant spaces generated by elements of these families. As an application, we obtain new sharp results on the density of semi-regular lattices for the Gabor frames generated by elements from these families.

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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