TU2.R6.1

Improved Non-Asymptotic Lower Bound on the Size of Optimal Insertion/Deletion Correcting Code

Yuhang Pi, Zhifang Zhang, Chinese Academy of Sciences, University of Chinese Academy of Sciences., China; Yaqian Zhang, Shanghai Jiao Tong University, China

Session:
Biology: Insertions and Deletions

Track:
17: Information and Coding in Biology

Location:
Sigma/Delta

Presentation Time:
Tue, 9 Jul, 11:30 - 11:50

Session Chair:
Maël Le Treust, CNRS
Abstract
In this paper, we provide non-asymptotic upper bounds on the size and average size of $s$-insertion $s$-deletion balls. As a corollary, we conclude an explicit non-asymptotic lower bound on the size of optimal $s$-insertion/deletion correcting code which is a strict improvement of Levenshtein’s lower bound given in 2002. Particularly, in the case of single insertion/deletion, comparing with Levenshtein’s bound, we reduce the gap to the maximum potential lower bound by at least $1/3$.
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