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• W2588219153 abstract "We consider the high-dimensional inference problem where the signal is a low-rank symmetric matrix which is corrupted by an additive Gaussian noise. Given a probabilistic model for the low-rank matrix, we compute the limit in the large dimension setting for the mutual information between the signal and the observations, as well as the matrix minimum mean squared error, while the rank of the signal remains constant. We also show that our model extends beyond the particular case of additive Gaussian noise and we prove an universality result connecting the community detection problem to our Gaussian framework. We unify and generalize a number of recent works on PCA, sparse PCA, submatrix localization or community detection by computing the information-theoretic limits for these problems in the high noise regime. In addition, we show that the posterior distribution of the signal given the observations is characterized by a parameter of the same dimension as the square of the rank of the signal (i.e. scalar in the case of rank one). This allows to locate precisely the information-theoretic thresholds for the above mentioned problems. Finally, we connect our work with the hard but detectable conjecture in statistical physics." @default.
• W2588219153 created "2017-02-24" @default.
• W2588219153 creator A5037845503 @default.
• W2588219153 creator A5075788811 @default.
• W2588219153 date "2018-04-10" @default.
• W2588219153 modified "2023-10-03" @default.
• W2588219153 title "Fundamental limits of symmetric low-rank matrix estimation" @default.
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• W2588219153 doi "https://doi.org/10.1007/s00440-018-0845-x" @default.
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