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arXiv 1408.4971math.FA
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$α$ -调制空间的可容许性

Admissibility for $α$-Modulation Spaces

Peter Balazs, Dominik Bayer, Michael Speckbacher

摘要:

本文研究了$α$调制空间的帧分解。这些空间可以作为仿射Weyl-Heisenberg群模适当子群的平方可积表示的余轨空间得到。该理论产生规范的建设Banach框架或原子分解$α$调制空间。在这个抽象的机器的一个必要成分是存在的生成函数是可接受的代表。为了数值计算的目的,具有紧支集的容许原子是必要的。我们展示了新的容许条件,大大提高了已知的结果。特别地,我们证明了在时域上具有紧支集的容许向量的存在性。

英文摘要:

This paper is concerned with frame decompositions of $α$-modulation spaces. These spaces can be obtained as coorbit spaces for square-integrable representations of the affine Weyl-Heisenberg group modulo suitable subgroups. The theory yields canonical constructions for Banach frames or atomic decompositions in $α$-modulation spaces. A necessary ingredient in this abstract machinery is the existence of generating functions that are admissible for the representation. For numerical purposes, admissible atoms with compact support are necessary. We show new admissibility conditions that considerably improve upon known results. In particular, we prove the existence of admissible vectors that have compact support in time domain.

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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