@inbook{SraR2013, title = {Tractable large-scale optimization in machine learning}, author = {Sra, S.}, booktitle = {Tractability: Practical Approaches to Hard Problems}, pages = {202--230}, chapter = {7}, editors = {Bordeaux, L., Hamadi , Y., Kohli, P. and Mateescu, R. }, publisher = {Cambridge University Press }, year = {2013}, doi = {} }