Google Groups : SEM 2.0: "Google says...
Latent Semantic Indexing (LSI) is a novel, patented information
retrieval method developed at Telcordia Technologies, Inc. By using
statistical algorithms, LSI can retrieve relevant documents even when
they do not share any words with a query. LSI uses these statistically
derived 'concepts' to improve search performance by up to 30%.
http://lsi.research.telcordia.�com/ "
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