Affine and Projective Planes Linked with Projective Lines over Certain Rings of Lower Triangular Matrices

Edyta Bartnicka, Metod Saniga

Let $T_n(q)$ be the ring of lower triangular matrices of order $n\ge 2$ with entries from the finite field $F(q)$ of order $q\ge 2$ and let ${}^2{T}_n(q)$ denote its free left mo…