The Universal Kummer Threefold
arXiv:1208.1229 · doi:10.1080/10586458.2013.816206
Abstract
The universal Kummer threefold is a 9-dimensional variety that represents the total space of the 6-dimensional family of Kummer threefolds in 7-dimensional projective space. We compute defining polynomials for three versions of this family, over the Satake hypersurface, over the Göpel variety, and over the reflection representation of type E7. We develop classical themes such as theta functions and Coble's quartic hypersurface using current tools from combinatorics, geometry, and commutative algebra. Symbolic and numerical computations for genus 3 moduli spaces appear alongside toric and tropical methods.
50 pages; v2: added Remark 4.3, strengthened Lemma 8.3; v3: added references and added supplementary files to source