2 citations · 2 across the 2 of their papers we have counts for
3 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 positive…
math.OC2022★ 2 cited
Harmonic Hierarchies for Polynomial Optimization
Sergio Cristancho, Mauricio Velasco
We introduce novel polyhedral approximation hierarchies for the cone of nonnegative forms on the unit sphere in and for its (dual) cone of moments. We prove computab…