Transitive Steiner triple systems of order 25
It is shown that there exist exactly three non-isomorphic non-cyclic Steiner triple systems of order 25 possessing transitive automorphism groups. Together with the 12 non-isomorphic cyclic systems this gives a total of 15 transitive Steiner triple systems of order 25.
scientific article; zbMATH DE number 4004194
scientific article