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math.ST updates on arXiv.org

What is Learnable in Valiant's Theory of the Learnable? 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A Unified View on Learning Unnormalized Distributions via Noise-Contrastive Estimation
J. Jon Ryu, Abhin Shah, Gregory W. Wornell · 2024-09-27 · via math.ST updates on arXiv.org

This paper studies a family of estimators based on noise-contrastive estimation (NCE) for learning unnormalized distributions. The main contribution of this work is to provide a unified perspective on various methods for learning unnormalized distributions, which have been independently proposed and studied in separate research communities, through the lens of NCE. This unified view offers new insights into existing estimators. Specifically, for exponential families, we establish the finite-sample convergence rates of the proposed estimators under a set of regularity assumptions, most of which are new.

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