3 papers
math.CO2025
Dihedral sign patterns in
Veronica Calvo Cortes, Hannah Tillmann-Morris
The connected components of are in bijection with the dihedral orderings of . They are all isomorphic. We construct monomial maps be…
hep-th2025
Symplectic Grassmannian description of the Coulomb branch three and four point amplitudes
Veronica Calvo Cortes, Yassine El Maazouz, Subramanya Hegde +1
We present a formulation of the three- and four-point amplitudes on the Coulomb branch of N=4 SYM as integrals over the symplectic Grassmannian. We demonstrate that their kinematic…
math.CO2024
Totally positive skew-symmetric matrices
Jonathan Boretsky, Veronica Calvo Cortes, Yassine El Maazouz
A matrix is totally positive if all of its minors are positive. This notion of positivity coincides with the type A version of Lusztig's more general total positivity in reductive…