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arxiv: math/0508575 · v2 · pith:DQTDQA2Tnew · submitted 2005-08-29 · 🧮 math.CO

Perfect single error-correcting codes in the Johnson Scheme

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keywords codesperfectsinglethereerror-correctingjohnsonschemeconjectured
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Delsarte conjectured in 1973 that there are no nontrivial pefect codes in the Johnson scheme. Etzion and Schwartz recently showed that perfect codes must be k-regular for large k, and used this to show that there are no perfect codes correcting single errors in J(n,w) for n <= 50000. In this paper we show that there are no perfect single error-correcting codes for n <= 2^250.

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