Efficient sum of outer products dictionary learning (SOUP-DIL) - The $\ell_0$ method. Ravishankar, S., Nadakuditi, R. R., & Fessler, J. A. 2015.
Efficient sum of outer products dictionary learning (SOUP-DIL) - The $\ell_0$ method [link]Paper  bibtex   
@MISC{ravishankar:15:eso-arxiv,
 author = {S. Ravishankar and R. R. Nadakuditi and J. A. Fessler},
 title = {Efficient sum of outer products dictionary learning {(SOUP-DIL)} - {The} {$\ell_0$} method},
 url = {http://arxiv.org/abs/1511.08842},
 year = 2015
}

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