3 papers
math.CO2025
The number of edges of a symmetric edge polytope
Giulia Codenotti, Roberto Riccardi, Lorenzo Venturello
The symmetric edge polytope of a simple graph is a lattice polytope defined as the convex hull of a subset of the type A roots corresponding to the edges of the graph. In this arti…
math.CO2025
Eulerian posets and -polynomials
Luis Ferroni, Roberto Riccardi
Let be a finite partially ordered set. In a recent series of works, Proudfoot introduced the notion of -polynomials associated with -kernels, providing a unified framewor…
math.CO2023
Chromatic functions, interval orders and increasing forests
Michele D'Adderio, Roberto Riccardi, Viola Siconolfi
The chromatic quasisymmetric functions (csf) of Shareshian and Wachs associated to unit interval orders have attracted a lot of interest since their introduction in 2016, both in c…