Search Results for author: Koki Okajima

Found 3 papers, 0 papers with code

Asymptotic Dynamics of Alternating Minimization for Non-Convex Optimization

no code implementations7 Feb 2024 Koki Okajima, Takashi Takahashi

This study investigates the asymptotic dynamics of alternating minimization applied to optimize a bilinear non-convex function with normally distributed covariates.

Average case analysis of Lasso under ultra-sparse conditions

no code implementations25 Feb 2023 Koki Okajima, Xiangming Meng, Takashi Takahashi, Yoshiyuki Kabashima

The obtained bound for perfect support recovery is a generalization of that given in previous literature, which only considers the case of Gaussian noise and diverging $d$.

Matrix completion based on Gaussian parameterized belief propagation

no code implementations1 May 2021 Koki Okajima, Yoshiyuki Kabashima

We develop a message-passing algorithm for noisy matrix completion problems based on matrix factorization.

Matrix Completion

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