284 citations
- Institut FourierFR4 papers
- Centre National de la Recherche ScientifiqueFR1 paper
- Laboratoire de Mathématiques Jean LerayFR1 paper
- Ruhr University BochumDE1 paper
- Technical University of MunichDE1 paper
- Université Grenoble AlpesFR1 paper
- Université Joseph FourierFR1 paper
- Université Pierre Mendès FranceFR1 paper
- University of LuxembourgLU1 paper
- University of MiamiUS1 paper
10 papers
Smooth Affine Surfaces with Non-Unique C*-Actions
Hubert Flenner, Shulim Kaliman, Mikhail Zaidenberg
In this paper we complete the classification of effective C*-actions on smooth affine surfaces up to conjugation in the full automorphism group and up to inversion of C*. If a smoo…
Model Checking Games for the Quantitative mu-Calculus
Diana Fischer, Erich Grädel, Lukasz Kaiser
We investigate quantitative extensions of modal logic and the modal mu-calculus, and study the question whether the tight connection between logic and games can be lifted from the…
Uniqueness of - and -actions on Gizatullin surfaces
Hubert Flenner, Shulim Kaliman, Mikhail Zaidenberg
A Gizatullin surface is a normal affine surface over , which can be completed by a zigzag; that is, by a linear chain of smooth rational curves. In this paper we deal wi…
Contractible Lie groups over local fields
Helge Glockner
Let G be a Lie group over a local field of positive characteristic which admits a contractive automorphism f (i.e., the forward iterates f^n(x) of each group element x converge to…
La singularité de O'Grady
Manfred Lehn, Christoph Sorger
Let M be the moduli space of semistable sheaves with Mukai vector 2v on an abelian or K3 surface where v is primitive such that <v,v>=2. We show that the blow-up of the reduced sin…
On the structure of pseudo-Riemannian symmetric spaces
Ines Kath, Martin Olbrich
Following our approach to metric Lie algebras developed in math.DG/0312243 we propose a way of understanding pseudo-Riemannian symmetric spaces which are not semi-simple. We introd…