All binary linear codes that are invariant under $\PSL_2(n)$

Cunsheng Ding, Hao Liu, Vladimir D. Tonchev

The projective special linear group $\PSL_2(n)$ is $2$-transitive for all primes $n$ and $3$-homogeneous for $n\equiv 3(\mathrm{mod}4)$ on the set $\{0,1,\cdots ,n-1,\infty \}$. It is…