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Shinsaku Sakaue

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#machine learning Preprint Sep 2026

Tight Regret Bound for Online Inverse Linear Optimization via Multiscale Matrix Weights

We study online inverse linear optimization with a fixed unknown linear utility: in each round, an environment presents a compact action set, the learner recommends an action from it, and the environment returns an action that maximizes the utility over the same set. When the utility vector and the actions lie in the $...

Shinsaku Sakaue · 2 citations · ⚡1
Conference Open access Sep 2026

A Sampling-Based Relaxation Approach to Contextual Inverse Optimization

A learning algorithm for general optimization problems with linear objective functions that eliminates the need to solve inverse optimization problems, and achieves competitive performance in terms of regret compared with existing methods, while offering improved computational efficiency for certain classes of downstre...

Yasunari Hikima, N. Kamiyama, Shinsaku Sakaue et al. · 0 citations

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