3 papers
math.AG2026
Computing the continuous symmetries of a parametrized variety
Benjamin Biaggi, Jan Draisma, Fulvio Gesmundo +2
We prove that the symmetry Lie algebra of a parametrized variety can be determined directly from the parametrization, without computing the vanishing ideal of the variety. We deriv…
math.CO2025
On gamma-vectors and Chow polynomials of restrictions of reflection arrangements
Sebastian Degen, Lisa Henetmayr, Magdaléna Mišinová +2
Simplicial arrangements are a special class of hyperplane arrangements, having the property that every chamber is a simplicial cone. It is known that the simpliciality property is…
math.CO2025
Binomiality of colored Gaussian models
Benjamin Biaggi, Jan Draisma, Magdaléna Mišinová
Following earlier work by Coons-Maraj-Misra-Sorea and Misra-Sullivant, we study colored, undirected Gaussian graphical models, and present a necessary and sufficient condition for…