Galois LCD Codes Over Fq + uFq + vFq + uvFq

Abstract: In \cite{anote}, Wu and Shi studied $l$-Galois LCD codes over finite chain ring $\mathcal{R}=\mathbb{F}_q+u\mathbb{F}_q$, where $u<sup>2=0$ and $q=p<sup>e$ for some prime $p$ and positive integer $e$. In this work, we extend the results to the finite non chain ring $$\mathcal{R} =\mathbb{F}_q+u\mathbb{F}_q+v\mathbb{F}_q+uv\mathbb{F}_q$$, where $u^{2=u,v^2=v}$ and $uv=vu$. We define a correspondence between $l$-Galois dual of linear codes over $\mathcal{R}$ and $l$-Galois dual of its component codes over $\mathbb{F}_q .$ Further, we construct Euclidean LCD and $l$-Galois LCD codes from linear code over $\mathcal{R}$. This consequently leads us to prove that any linear code over $\mathcal{R}$ is equivalent to Euclidean ($ q&gt;3 $) and $l$-Galois LCD ($0<l<e$, and $p^{e-l}+1\mid p<sup>e-1$) code over $\mathcal{R} .$ Finally, we investigate MDS codes over $\mathcal{R} .$