The null space property for sparse recovery from multiple measurement vectors

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Sparse Subspace Clustering: Algorithm, Theory, and Applications (2012, methodology): “bspace-sparse representations of data points in independent subspaces. Remark 2: The condition in (22) is closely related to the nullspace property in the sparse recovery literature [36], [48], [49], [50]. The key difference, however, is that we only require the inequality in (22) to hold for the op”