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Full-Span Log-Linear Model and Fast Learning Algorithm

2022/02/17 by Kazuya Takabatake, Takabatake, Kazuya, Shotaro Akaho +1
Computer Science · Mathematics · #FOS: Computer and information sciences #Generative Adversarial Networks and Image Synthesis #Machine Learning (cs.LG) #Markov Chains and Monte Carlo Methods #Neural Networks and Applications

paper · pdf · doi:10.48550/arxiv.2202.08472

openalex publication_date 2022/02/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The full-span log-linear(FSLL) model introduced in this paper is considered an n-th order Boltzmann machine, where n is the number of all variables in the target system. Let X=(X0,...,Xn-1) be finite discrete random variables that can take |X|=|X0|...|Xn-1| different values. The FSLL model has |X|-1 parameters and can represent arbitrary positive distributions of X. The FSLL model is a "highest-order" Boltzmann machine; nevertheless, we can compute the dual parameters of the model distribution, which plays important roles in exponential families, in O(|X|log|X|) time. Furthermore, using properties of the dual parameters of the FSLL model, we can construct an efficient learning algorithm. The FSLL model is limited to small probabilistic models up to |X|≈225; however, in this problem domain, the FSLL model flexibly fits various true distributions underlying the training data without any hyperparameter tuning. The experiments presented that the FSLL successfully learned six training datasets such that |X|=220 within one minute with a laptop PC.

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