Soft Recovery Through $\ell_{1,2}$ Minimization with Applications in Recovery of Simultaneously Sparse and Low-Rank Matrice

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Abstract: This article provides a new type of analysis of a compressed-sensing based technique for recovering column-sparse matrices, namely minimization of the

e l l_{1, 2}

-norm. Rather than providing conditions on the measurement matrix which guarantees the solution of the program to be exactly equal to the ground truth signal (which already has been thoroughly investigated), it presents a condition which guarantees that the solution is approximately equal to the ground truth. Soft recovery statements of this kind are to the best knowledge of the author a novelty in Compressed Sensing. Apart from the theoretical analysis, we present two heuristic proposes how this property of the

e l l_{1, 2}

-program can be utilized to design algorithms for recovery of matrices which are sparse and have low rank at the same time.

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