The Hitchhiker's Guide to LDA

TL;DR

This paper provides a detailed, accessible explanation of the mathematical derivation of Latent Dirichlet Allocation (LDA), aimed at helping beginners understand its complex concepts and background.

Contribution

It offers a comprehensive, beginner-friendly analysis of LDA's mathematical derivation, including background knowledge and unique insights.

Findings

Clarifies the mathematical derivation of LDA

Provides background knowledge for beginners

Includes the author's unique insights

Abstract

Latent Dirichlet Allocation (LDA) model is a famous model in the topic model field, it has been studied for years due to its extensive application value in industry and academia. However, the mathematical derivation of LDA model is challenging and difficult, which makes it difficult for the beginners to learn. To help the beginners in learning LDA, this book analyzes the mathematical derivation of LDA in detail, and it also introduces all the knowledge background to make it easy for beginners to understand. Thus, this book contains the author's unique insights. It should be noted that this book is written in Chinese.