Affiliation: | 1. Mathematics Institute, University of Warwick, United Kingdom;2. Institute of Algebra and Geometry, Otto von Guericke Universität Magdeburg, Magdeburg, Germany;3. Department of Mathematics: Algebra and Geometry, Ghent University, 9000 Gent, Belgium;4. Department of Mathematics, KTH Royal Institute of Technology, Stockholm, Sweden;5. Department of Mathematics, University of Pisa, Pisa, Italy;6. Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany |