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arxiv: 1612.02178 · v2 · pith:5VPOAWZ3new · submitted 2016-12-07 · 🧮 math.CO · math.OC

Improved upper bound on A(18,8)

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keywords boundbinarycardinalitycodeconsiderdistancegijswijtimproved
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For nonnegative integers $n$ and $d$, let $A(n,d)$ be the maximum cardinality of a binary code of length $n$ and minimum distance at least $d$. We consider a slight sharpening of the semidefinite programming bound of Gijswijt, Mittelmann and Schrijver, and obtain that $A(18,8)\leq 70$.

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