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math.NA2019
The spectral properties of Vandermonde matrices with clustered nodes
Dmitry Batenkov, Benedikt Diederichs, Gil Goldman +1
We study rectangular Vandermonde matrices with rows and irregularly spaced nodes on the unit circle, in cases where some of the nodes are "clustered" togethe…
math.NA2019★ 16 cited
Well-Posedness of Sparse Frequency Estimation
Benedikt Diederichs
The problem of estimating the frequencies of an exponential sum has been studied extensively over the last years. It can be understood as a sparse estimation problem, as it strives…