An improved upper bound on self-dual codes over finite fields $GF(11),GF(19)$, and $GF(23)$

Whan-Hyuk Choi, Jon-Lark Kim

This paper gives new methods of constructing {\it symmetric self-dual codes} over a finite field $GF(q)$ where $q$ is a power of an odd prime. These methods are motivated by the we…