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Score Matching for Truncated Density Estimation on a Manifold
April 15, 2024, 4:44 a.m. | Daniel J. Williams, Song Liu
stat.ML updates on arXiv.org arxiv.org
Abstract: When observations are truncated, we are limited to an incomplete picture of our dataset. Recent methods propose to use score matching for truncated density estimation, where the access to the intractable normalising constant is not required. We present a novel extension of truncated score matching to a Riemannian manifold with boundary. Applications are presented for the von Mises-Fisher and Kent distributions on a two dimensional sphere in $\mathbb{R}^3$, as well as a real-world application of …
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