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Axioms  2013 

Complexity L0-Penalized M-Estimation: Consistency in More Dimensions

DOI: 10.3390/axioms2030311

Keywords: adaptive estimation, penalized M-estimation, Potts functional, complexity penalized, variational approach, consistency, convergence rates, wedgelet partitions, Delaunay triangulations

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Abstract:

We study the asymptotics in L2 for complexity penalized least squares regression for the discrete approximation of finite-dimensional signals on continuous domains—e.g., images—by piecewise smooth functions. We introduce a fairly general setting, which comprises most of the presently popular partitions of signal or image domains, like interval, wedgelet or related partitions, as well as Delaunay triangulations. Then, we prove consistency and derive convergence rates. Finally, we illustrate by way of relevant examples that the abstract results are useful for many applications.

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