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The group of permutation automorphisms of a q-ary hamming code

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Abstract

We prove that the group of permutation automorphism of a q-ary Hamming code of length n = (q m − 1)/(q − 1) is isomorphic to the unitriangular group UT m (q) if the code has a parity-check matrix composed of all columns of the form (0 ...0 1 * ... *)T. We also show that the group of permutation automorphisms of a cyclic Hamming code cannot be isomorphic to UT m (q). We thus show that equivalent codes can have different permutation automorphism groups.

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Correspondence to E. V. Gorkunov.

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Original Russian Text © E.V. Gorkunov, 2009, published in Problemy Peredachi Informatsii, 2009, Vol. 45, No. 4, pp. 18–25.

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Gorkunov, E.V. The group of permutation automorphisms of a q-ary hamming code. Probl Inf Transm 45, 309–316 (2009). https://doi.org/10.1134/S0032946009040024

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