A Steiner triple system STS(v) is a set of triples of {1, 2, . . . , v} such that every pair of points belongs to exactly one of these triples. A Kirkman triple system KTS(v) is a STS(v) whose triples can be partitioned into parallel classes, each of which is a partition of the point set. A KTS(v) is called 3-pyramidal if it admits a group of automorphisms that fixes 3 points and acts regularly on the other points. I will present recent results we obtained about 3-pyramidal Kirkman triple systems. This is joint work with  S. Bonvicini, M. Buratti, G. Rinaldi and T. Traetta.

 

Date and Venue

Start Date
Venue
Online seminar
End Date

Speaker

Martino Garonzi

Speaker's Institution

Universidade de Brasília - UnB - DF, Brasil

Files

Area

Algebra, Combinatorics and Number Theory