Spectral Algorithms for Learning Latent Variable Models

We are happy to share with you a recent talk by Sham Kakade from Microsoft recorded at theĀ NYC Machine Learning meetup . In this talk he discusses a general and (computationally and statistically) efficient parameter estimation method for a wide class of latent variable models---including Gaussian mixture models, hidden Markov models and latent Dirichlet allocation---by exploiting a certain tensor structure in their low-order observable moments.