293 citations
- Freie Universität BerlinDE24 papers
- Technische Universität BerlinDE8 papers
- Humboldt-Universität zu BerlinDE5 papers
- Tel Aviv UniversityIL5 papers
- Exact Sciences (United States)US3 papers
- University of Illinois ChicagoUS3 papers
- ETH ZurichCH2 papers
- Institut des Hautes Études ScientifiquesFR2 papers
- Laboratoire de Probabilités et Modèles AléatoiresFR2 papers
- Max Planck Institute for Gravitational PhysicsDE2 papers
- Universidade de São PauloBR2 papers
- Universität HamburgDE2 papers
Showing math.AGShow all
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math.AG2012
Merging divisorial with colored fans
Klaus Altmann, Valentina Kiritchenko, Lars Petersen
Given a spherical homogeneous space G/H of minimal rank, we provide a simple procedure to describe its embeddings as varieties with torus action in terms of divisorial fans. The to…
math.AG2011
Negative deformations of toric singularities that are smooth in codimension two
Klaus Altmann, Lars Kastner
Given a polyhedral cone sigma with smooth two-dimensional faces and, moreover, a lattice point R in the dual cone of sigma, we describe the part of the versal deformation of the as…
math.AG2010★ 4 cited
Cox rings of rational complexity one T-varieties
Klaus Altmann, Lars Petersen
Let X be a Mori dream space together with an effective torus action of complexity one. In this note, we construct a polyhedral divisor on a suitable covering of the projective line…