3 papers
math.AG2025
Configurations in the Euclidean plane associated to a system of equations
Francesco Colangelo
In the Euclidean plane , fix four pairwise distinct points \begin{equation*} \label{eqA} \begin{array}{ccc} A=(a_1,a_2),\ B=(b_1,b_2),\ C=(c_1,c_2),\ D=(d_1,d_2), \end{…
math.CO2024
The Perfect Matching Hamiltonian property in Prism and Crossed Prism graphs
Francesco Colangelo, Federico Romaniello
A graph has the \emph{Perfect Matching Hamiltonian property} (or for short, is ) if, for each one of its perfect matchings, there is another perfect matching of su…
math.CO2024
The association scheme on the set of flags of a finite generalized quadrangle
Francesco Colangelo, Giusy Monzillo, Alessandro Siciliano
In this paper, the association scheme defined on the flags of a finite generalized quadrangle is considered. All possible fusions of this scheme are listed, and a full description…