3 papers
math.AG2025
Horospherical subgroups in positive characteristic
Matilde Maccan, Ronan Terpereau
We investigate horospherical homogeneous spaces--a class of spherical homogeneous spaces encompassing both flag varieties and algebraic tori--over algebraically closed fields of ch…
math.AG2025
Automorphism group of flag varieties with non-reduced stabilizer
Matilde Maccan
We consider rational projective homogeneous varieties over an algebraically closed field of positive characteristic, namely quotients of a semi-simple group by a possibly non-reduc…
math.AG2025
Isotrivial elliptic surfaces in positive characteristic
Pascal Fong, Matilde Maccan
We study relatively minimal surfaces equipped with a strongly isotrivial elliptic fibration in positive characteristic by means of the notion of equivariantly normal curves introdu…