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Published online by Cambridge University Press: 30 October 2025
We study perfect codes in the homogeneous metric over the ring  $\mathbb {Z}_{{2}^k}, k\ge 2$. We derive arithmetic nonexistence results from Diophantine equations on the parameters resulting from the sphere packing conditions, and a Lloyd theorem based on the theory of weakly metric association schemes.
$\mathbb {Z}_{{2}^k}, k\ge 2$. We derive arithmetic nonexistence results from Diophantine equations on the parameters resulting from the sphere packing conditions, and a Lloyd theorem based on the theory of weakly metric association schemes.
This research is supported by National Natural Science Foundation of China (Grant no. 12471490).
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