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• W4310074865 abstract "Feature selection is a fundamental process to avoid overfitting and to reduce the size of databases without significant loss of information that applies to hierarchical clustering. Dendrograms are graphical representations of hierarchical clustering algorithms that for single linkage clustering can be interpreted as minimum spanning trees in the complete network defined by the database. In this work, we introduce the problem that determines jointly a set of features and a dendrogram, according to the single linkage method. We propose different formulations that include the minimum spanning tree problem constraints as well as the feature selection constraints. Different bounds on the objective function are studied. For one of the models, several families of valid inequalities are proposed and the problem of separating them is studied. For another formulation, a decomposition algorithm is designed. In an extensive computational study, the effectiveness of the different models is discussed, the model with valid inequalities is compared with the decomposition algorithm. The computational results also illustrate that the integration of feature selection to the optimization model allows to keep a satisfactory percentage of information." @default.
• W4310074865 created "2022-11-30" @default.
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• W4310074865 date "2023-07-01" @default.
• W4310074865 modified "2023-09-23" @default.
• W4310074865 title "Dendrograms, minimum spanning trees and feature selection" @default.
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• W4310074865 doi "https://doi.org/10.1016/j.ejor.2022.11.031" @default.
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