1 problem

Let $G_{k\times 2k}$ be the $k\times 2k$ generator matrix whose columns are $e_1,e_2,\ldots,e_k,e_1+e_2,e_2+e_3,\ldots,e_{k-1}+e_k,e_k+e_1$, where $e_1,\ldots,e_k$ are the standard…