2 problems

A $\Gamma$-magic rectangle set $\operatorname{MRS}_{\Gamma}(a,b;c)$ on an Abelian group $\Gamma$ of order $abc$ is a collection of $c$ arrays of size $a\times b$, whose entries are…

Let $G$ be an abelian group of order $abc$, with $a,b>1$. An MRS$_G(a,b;c)$ is a magic rectangle set over $G$ consisting of $c$ arrays of size $a\times b$. The necessary conditions…