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Lecture
Are you an EPFL student looking for a semester project?
Work with us on data science and visualisation projects, and deploy your project as an app on top of Graph Search.
This lecture covers the concept of Latent Semantic Indexing in the context of Information Retrieval Indexing. It explains Fagin's Algorithm and the importance of maintaining document order for vocabulary construction. The Threshold Algorithm is introduced as an alternative to Fagin's Algorithm, discussing its sequential element access and termination conditions. The discussion extends to the complexity of algorithms, distributed retrieval, and applications beyond distributed systems. The challenges of synonymy and homonymy in Vector Space Retrieval are highlighted, emphasizing the need for more concept-focused information retrieval methods.