Matrix-Product Codes over Commutative Rings and Constructions Arising from $(σ,δ)$-Codes

Mhammed Boulagouaz; Abdulaziz Deajim

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arXiv · 1910.08899

Matrix-Product Codes over Commutative Rings and Constructions Arising from $(σ,δ)$-Codes

Mhammed Boulagouaz·Abdulaziz Deajim

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Abstract

A well-known lower bound (over finite fields and some special finite commutative rings) on the Hamming distance of a matrix-product code (MPC) is shown to remain valid over any commutative ring $R$. A sufficient condition is given, as well, for such a bound to be sharp. It is also shown that an MPC is free when its input codes are all free, in which case a generating matrix is given. If $R$ is finite, a sufficient condition is provided for the dual of an MPC to be an MPC, a generating matrix for such a dual is given, and characterizations of LCD, self-dual, and self-orthogonal MPCs are presented. Finally, results of this paper are used along with previous results of the authors to construct novel MPCs arising from $(σ, δ)$-codes. Some properties of such constructions are also studied.

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Mhammed Boulagouaz, Abdulaziz Deajim. 2019-10-20. Matrix-Product Codes over Commutative Rings and Constructions Arising from $(σ,δ)$-Codes. https://arxiv.org/abs/1910.08899

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