Computing a nonnegative matrix factorization–provably. Arora, S., Ge, R., Kannan, R., & Moitra, A. In Proceedings of the forty-fourth annual ACM symposium on Theory of computing, pages 145–162, 2012. ACM.
doi  bibtex   
@inproceedings{arora_computing_2012,
	title = {Computing a nonnegative matrix factorization–provably},
	doi = {10/gqg9fd},
	booktitle = {Proceedings of the forty-fourth annual {ACM} symposium on {Theory} of computing},
	publisher = {ACM},
	author = {Arora, Sanjeev and Ge, Rong and Kannan, Ravindran and Moitra, Ankur},
	year = {2012},
	keywords = {/unread},
	pages = {145--162},
}

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