PROBABILISTIC LATENT SEMANTIC ANALYSIS

• Review Latent Semantic Indexing/Analysis (LSI/LSA) – LSA is a technique of analyzing relationships between a set of documents and the terms they contain by producing a set of concepts related to the documents and terms. – In the context of its application to information retrieval, it is called LSI. • Probabilistic Latent Semantic Indexing/Analysis (PLSI/PLSA) • Hypertext‐Induced Topic Selection (HITS and PHITS) • Joint model of PHITS and PLSI