作者: Patric R. J. Östergård , Antti Laaksonen
DOI:
关键词: Minimum distance 、 Permutation group 、 Computer search 、 Transitive relation 、 Discrete mathematics 、 Combinatorics 、 Mathematics 、 Error correcting 、 Binary code 、 Maximum size
摘要: Let $A_2(n,d)$ be the maximum size of a binary code length $n$ and minimum distance $d$. In this paper we present following new lower bounds: $A_2(18,4) \ge 5632$, $A_2(21,4) 40960$, $A_2(22,4) 81920$, $A_2(23,4) 163840$, $A_2(24,4) 327680$, $A_2(24,10) 136$, $A_2(25,6) 17920$. The bounds are result systematic computer search over transitive permutation groups.