CHAPTER Varadarajan_MITPRESS_2012/IDIAP Sparsity in Topic Models Varadarajan, Jagannadan Emonet, Remi Odobez, Jean-Marc EXTERNAL https://publications.idiap.ch/attachments/papers/2012/Varadarajan_MITPRESS_2012.pdf PUBLIC Practical Applications of Sparse Modeling: Biology, Signal Processing and Beyond 2012 MIT Press