Koki Okajima

most citedOn the phase diagram of extensive-rank symmetric matrix denoising beyond rotational invariance

1 citations · 1 across the 4 of their papers we have counts for

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cs.IR2026

Non-negative Elastic Net Decoding for Information Retrieval

Koki Okajima, Yasutoshi Ida, Tsukasa Yoshida +1

Dense retrieval has become the dominant paradigm in information retrieval, in which each document is scored against a query by the inner product of their vector embeddings, and the…

cs.IR2026

What Limits Does Quantization Place on Dense Top- $k$ Retrieval? A Theoretical Study

Koki Okajima, Tsukasa Yoshida

We establish conditions for embedding a corpus of $N$ documents as $d$ -dimensional vectors such that every $k$ -subset $S \subseteq [N]$ is realizable as a result of top- $k$ retriev…

Non-negative Elastic Net Decoding for Information Retrieval

What Limits Does Quantization Place on Dense Top-k Retrieval? A Theoretical Study

What Limits Does Quantization Place on Dense Top- $k$ Retrieval? A Theoretical Study