Publications

Periodicity of weight enumerators for codes generated by an integral matrix

Koji Imamura, Norihiro Nakashima, Takuya Saito

arXiv preprint arXiv:2601.21121, 2026

Preprint analysing periodic behaviour of weight enumerators for sequences of codes generated by an integral matrix.

On the one-dimensional extensions of $q$-matroids

Koji Imamura, Shinya Kawabuchi, Keisuke Shiromoto

arXiv preprint arXiv:2503.06830, 2025

Preprint on one-dimensional extensions of q-matroids, focusing on the structure of extendability.

Critical problem for a $q$-analogue of polymatroids

Koji Imamura, Keisuke Shiromoto

Discrete Math., 347(5), Paper No. 113924, 13, 2024

Journal paper formulating the critical problem for a q-analogue of polymatroids, and providing q-analogues of minimal blocks together with concrete examples.

Critical Problem for codes over finite chain rings

Koji Imamura, Keisuke Shiromoto

Finite Fields Appl., 76, Paper No. 101900, 14, 2021

Journal paper on the critical problem for codes over finite chain rings, including upper-bound results.