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arxiv: 1812.05708 · v2 · pith:NP2D6VRJnew · submitted 2018-12-13 · 🧮 math.CA

A Fourier Frame for the Middle-Third Cantor Measure

classification 🧮 math.CA
keywords framelambdameasureadmitsalphacantorexponentialsanswering
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In this paper we show that if $\mu$ is any locally and uniformly $\alpha$-dimensional measure supported on a $\alpha$-quasi-regular set $E$, then $L^2(\mu)$ admits a frame of exponentials. In particular, for the uniform middle third Cantor measure, $\mu_C,$ our result shows that there exists a countable set $\Lambda$ such that $\{e^{2\pi i t \lambda}\}_{\lambda \in \Lambda}$ is a frame for $L^2(\mu_C)$ (i.e. the measure $\mu_C$ admits a generalized spectrum), answering an old outstanding question about the existence of a frame of exponentials for the space $L^2(\mu_C)$.

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