Atomic decomposition by basis pursuit . Technical Report 479, Department of Statistics, Stanford University, 1995. Atomic decomposition by basis pursuit , February 1996. Available at ftp.playfair.stanford.edu. These elements do not have to be linearly independent, and instead may form an overcomplete dictionary.
Sparsity means that only a small number of the coecients k di er signi cantly from zero.
Orig.response Restored resp.