An equivariant Riemann-Roch theorem for complete, simplicial toric varieties.
An extension of Rais' theorem and seaweed subalgebras of simple Lie algebras
We prove an extension of Rais' theorem on the coadjoint representation of certain graded Lie algebras. As an application, we prove that, for the coadjoint representation of any seaweed subalgebra in a general linear or symplectic Lie algebra, there is a generic stabiliser and the field of invariants is rational. It is also shown that if the highest root of a simple Lie algerba is not fundamental, then there is a parabolic subalgebra whose coadjoint representation do not...
An orbit closure for a representation of the Kronecker quiver with bad singularities
We give an example of a representation of the Kronecker quiver for which the closure of the corresponding orbit contains a singularity smoothly equivalent to the isolated singularity of two planes crossing at a point. Therefore this orbit closure is neither Cohen-Macaulay nor unibranch.
Analytic curves in power series rings
Anneaux d'invariants de groupes finis Intersections complètes
Appendix : An example of thick wall
Arithmetisch definierte Gruppen mit Galoisoperation.
Automorphism groups of compact Klein surfaces with one boundary component.
Automorphism groups of the modular curves
Automorphismes et deformations des varietes de Borel
Automorphisms of cusps and Inoue-Hirzebruch surfaces
Automorphisms of Enriques surfaces which act trivially on the cohomology groups.