Latent Dirichlet Allocation: The Gritty Details

This is my learning note on the LDA model: Latent Dirichlet Allocation: The Gritty Details.

The LaTeX source code is at: https://github.com/wangkuiyi/gritty-details-latent-topic-modeling/. Your comments, that could be in the form of Github pull requests, are very welcome!