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• W2246467284 abstract "This paper provides a theoretical support for clustering aspect of the nonnegative matrix factorization (NMF). By utilizing the Karush-Kuhn-Tucker optimality conditions, we show that NMF objective is equivalent to graph clustering objective, so clustering aspect of the NMF has a solid justification. Different from previous approaches which usually discard the nonnegativity constraints, our approach guarantees the stationary point being used in deriving the equivalence is located on the feasible region in the nonnegative orthant. Additionally, since clustering capability of a matrix decomposition technique can sometimes imply its latent semantic indexing (LSI) aspect, we will also evaluate LSI aspect of the NMF by showing its capability in solving the synonymy and polysemy problems in synthetic datasets. And more extensive evaluation will be conducted by comparing LSI performances of the NMF and the singular value decomposition (SVD), the standard LSI method, using some standard datasets." @default.
• W2246467284 created "2016-06-24" @default.
• W2246467284 creator A5012872461 @default.
• W2246467284 date "2011-12-17" @default.
• W2246467284 modified "2023-09-27" @default.
• W2246467284 title "Clustering and Latent Semantic Indexing Aspects of the Nonnegative Matrix Factorization" @default.
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