Author

Heng-Jia Wei

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Preprint Sep 2026

Exponentially Larger Deletion-Correcting Codes and Constant-List-Decodable Insertion-Deletion Codes

We establish improved asymptotic rate bounds for adversarial insertion--deletion codes. For binary unique-deletion correction in the linear-deletion regime, we strictly improve Levenshtein's classical lower-bound expression. At deletion fraction $\delta=0.1$, our achievable rate increases from $0.162009$ to $0.194890$,...

Han Mao Kiah, Heng-Jia Wei, Rui-Xiao Zeng · 2 citations

Preprint Sep 2026

Constant-List Insertion--Deletion Codes:New Bounds and an Improvement of Levenshtein's Lower Bound

We study codes correcting adversarial insertions and deletions with list size $L$ fixed independently of the block length. We derive new achievable-rate bounds for binary codes and upper bounds over every fixed alphabet of size $q\ge2$, retaining explicit dependence on $L$. We establish a combinatorial reduction that t...

Han Mao Kiah, Heng-Jia Wei, Rui-Xiao Zeng · 2 citations