4 problems

Let $q$ be a prime power, and let $n$ denote the length of a Hermitian self-dual generalized Reed–Solomon (GRS) code. Guo–Li's nonexistence conjecture. There are no Hermitian self-…

Let $q$ be a prime power and let $n$ be an even length satisfying … A Hermitian self-dual MDS generalized Reed–Solomon (GRS) code is one that is self-dual under the Hermitian inner…

Let $q$ be a prime power, and let $n$ and $k$ be parameters for an extended twisted generalized Reed–Solomon (ETGRS) code, with the feasible values of $k$ understood relative to th…

Let $q$ be a prime power, and let $n$ and $k$ satisfy $3\leq k\leq n-2$ and $(n-k)$ odd. An $[n+1,k,n-k+2]_q$ extended twisted generalized Reed–Solomon (ETGRS) code is an MDS code…