Codes and Designs in Johnson Graphs From Symplectic Actions on Quadratic Forms

John Bamberg, Alice Devillers, Mark Ioppolo +1

The Johnson graph $J(v,k)$ has as vertices the $k$-subsets of $\mathcal{V}=\{1,\dots ,v\}$, and two vertices are joined by an edge if their intersection has size $k-1$. An \emph{…