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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
Equivariant automorphism group and real forms of complexity-one varieties
Giancarlo Lucchini Arteche, Ronan Terpereau
Let be a connected reductive real algebraic group. We prove that every real -variety of complexity one admits only finitely many pairwise non-isomorphic -for…