2 papers
math.CO2026
Extremal Graphs for the Lights Out Problem
Julien Codsi, Sergio Cristancho, Alexander Divoux +1
Lights Out is a game played on a graph where every vertex has a light bulb that is either on or off, and pressing a vertex toggles the state of every vertex in the closed n…
math.CO2026
Tree metrics and log-concavity for matroids
Federico Ardila-Mantilla, Sergio Cristancho, Graham Denham +3
We show that a set function satisfies the gross substitutes property if and only if its homogeneous generating polynomial is a Lorentzian polynomial for all positiv…