2 papers
math.AG2026
Positive Charts of Toric Varieties
Veronica Calvo Cortes, Simon Telen
We construct affine charts of a smooth projective toric variety which contain its nonnegative points, and which admit a closed embedding into the total coordinate space of Cox's qu…
math.CO2026
Kinematic Stratifications
Veronica Calvo Cortes, Hadleigh Frost, Bernd Sturmfels
We study stratifications of regions in the space of symmetric matrices. Their points are Mandelstam matrices for momentum vectors in particle physics. Kinematic strata in these reg…