Torsion in the symmetric algebra and images of rational maps

Upgrades and Downgrades of p-divisors

On the so-called Fermat–Pell Equation x^2−dy^2 =±1

LVMB manifolds and triangulations of spheres

Shelling, constructing, counting

Separating invariants for the basic $G_a$-actions

Parametrizations of Ideals in K[x,y]

Gorenstein projections and diptych varieties

tba

Holomorphic foliations on CP2 and Geometric Invariant Theory