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arXiv · 1809.06541

Existence and exactness of exponential Riesz sequences and frames for fractal measures

Dorin Ervin Dutkay·Shahram Emami·Chun-Kit Lai
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Abstract

We study the construction of exponential frames and Riesz sequences for a class of fractal measures on ${\mathbb R}^d$ generated by infinite convolution of discrete measures using the idea of frame towers and Riesz-sequence towers. The exactness and overcompleteness of the constructed exponential frame or Riesz sequence is completely classified in terms of the cardinality at each level of the tower. Using a version of the solution of the Kadison-Singer problem, known as the $R_{\epsilon}$-conjecture, we show that all these measures contain exponential Riesz sequences of infinite cardinality. Furthermore, when the measure is the middle-third Cantor measure, or more generally for self-similar measures with no-overlap condition, there are always exponential Riesz sequences of maximal possible Beurling dimension.

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Dorin Ervin Dutkay, Shahram Emami, Chun-Kit Lai. 2018-09-18. Existence and exactness of exponential Riesz sequences and frames for fractal measures. https://arxiv.org/abs/1809.06541

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