History
It was introduced in 1999 by Jan Puzicha, who later founded together with Derek Schueren the company Recommind, and Thomas Hofmann, and it is related to non-negative matrix factorization.
Read more about this topic: Probabilistic Latent Semantic Analysis
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“Only the history of free peoples is worth our attention; the history of men under a despotism is merely a collection of anecdotes.”
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—Catherine Drinker Bowen (1897–1973)