On the number of small Steiner triple systems with Veblen points

Autor: Mario, Galici, Filippone, Giuseppe
Rok vydání: 2024
Předmět:
Zdroj: Discrete Math. 348, No. 1, Article ID 114294, 13 p. (2025)
Druh dokumentu: Working Paper
DOI: 10.1016/j.disc.2024.114294
Popis: The concept of Schreier extensions of loops was introduced in the general case in [11] and, more recently, it has been explored in the context of Steiner loops in [6]. In the latter case, it gives a powerful method for constructing Steiner triple systems containing Veblen points. Counting all Steiner triple systems of order v is an open problem for v>21. In this paper, we investigate the number of Steiner triple systems of order 19, 27 and 31 containing Veblen points and we present some examples.
Databáze: arXiv