Abstract
The exact sizes of optimal \(q\)-ary codes of length \(n\), constant weight \(w\) and distance \(d=2w-1\) have only been determined for \(q\in \{2,3\}\), and for \(w|(q-1)n\) and \(n\) sufficiently large. We completely determine the exact size of optimal \(q\)-ary codes of constant weight three and minimum distance five for all \(q\) by establishing a connection with Hanani triple packings, and settling their existence.
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Acknowledgments
Research of G. Ge was partially supported by the National Natural Science Foundation of China under Grant No.61171198 and the Zhejiang Provincial Natural Science Foundation of China under Grant No. LZ13A010001. Research of X. Zhang was partially supported in part by NSFC under Grant No. 11301503.
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Chee, Y.M., Ge, G., Zhang, H. et al. Hanani triple packings and optimal \(q\)-ary codes of constant weight three. Des. Codes Cryptogr. 75, 387–403 (2015). https://doi.org/10.1007/s10623-014-9919-7
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DOI: https://doi.org/10.1007/s10623-014-9919-7