Article

# Nullspaces and frames

12/2004;
Source: arXiv

ABSTRACT In this paper we give new characterizations of Riesz and conditional Riesz frames in terms of the properties of the nullspace of their synthesis operators. On the other hand, we also study the oblique dual frames whose coefficients in the reconstruction formula minimize different weighted norms.

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18 Feb 2013

### Keywords

new characterizations

oblique dual frames

reconstruction formula minimize different weighted norms

synthesis operators