Constructive Setting of the Density Ratio Estimation Problem and its Rigorous Solution

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Direct Importance Estimation with Model Selection and Its Application to Covariate Shift Adaptation

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Mutual information approximation via maximum likelihood estimation of density ratio

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Change-point detection in time-series data by direct density-ratio estimation

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In: Covariate Shift by Kernel Mean Matching. MIT Press (2009) 131–160

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Estimating divergence functionals and the likelihood ratio by convex risk minimization

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