5 papers · 1 filter
Classification of equivariantly normal curves via Altmann-Hausen-Süss theory
Gary Martínez-Núnez, Ronan Terpereau
Let the ground field be perfect of positive characteristic. Using Altmann-Hausen-Süss theory, we obtain a combinatorial classification of equivariantly normal curves with prescribe…
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…
Equivariant automorphism group and real forms of complexity-one varieties
Giancarlo Lucchini Arteche, Ronan Terpereau
Let G be a connected reductive algebraic group over a perfect field. We study the representability of the equivariant automorphism group of G-varieties. For a broad class of comple…
Real forms of Mori fiber spaces with many symmetries
Ronan Terpereau, Susanna Zimmermann
We determine the rational real forms of the complex Mori fiber spaces for which the identity component of the automorphism group is a maximal connected algebraic subgroup of $\math…
Real structures on horospherical varieties
Lucy Moser-Jauslin, Ronan Terpereau, Mikhail Borovoi
We study the equivariant real structures on complex horospherical varieties, generalizing classical results known for toric varieties and flag varieties. In particular, we obtain a…