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The overarching finite symmetry group of Kummer surfaces in the Mathieu group M 24

  • A. TaorminaEmail author
  • K. Wendland
Article

Abstract

In view of a potential interpretation of the role of the Mathieu group M 24 in the context of strings compactified on K3 surfaces, we develop techniques to combine groups of symmetries from different K3 surfaces to larger ‘overarching’ symmetry groups. We construct a bijection between the full integral homology lattice of K3 and the Niemeier lattice of type \( A_1^{24 } \), which is simultaneously compatible with the finite symplectic automorphism groups of all Kummer surfaces lying on an appropriate path in moduli space connecting the square and the tetrahedral Kummer surfaces. The Niemeier lattice serves to express all these symplectic automorphisms as elements of the Mathieu group M 24, generating the ‘overarching finite symmetry group’ \( {{\left( {{{\mathbb{Z}}_2}} \right)}^4} \)A 7 of Kummer surfaces. This group has order 40320, thus surpassing the size of the largest finite symplectic automorphism group of a K3 surface by orders of magnitude. For every Kummer surface this group contains the group of symplectic automorphisms leaving the Kähler class invariant which is induced from the underlying torus. Our results are in line with the existence proofs of Mukai and Kondo, that finite groups of symplectic automorphisms of K3 are subgroups of one of eleven subgroups of M 23, and we extend their techniques of lattice embeddings for all Kummer surfaces with Kähler class induced from the underlying torus.

Keywords

Extended Supersymmetry Discrete and Finite Symmetries Conformal Field Models in String Theory 

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Copyright information

© SISSA, Trieste, Italy 2013

Authors and Affiliations

  1. 1.Centre for Particle Theory & Department of Mathematical Sciences, Durham University, Science LaboratoriesDurhamU.K.
  2. 2.Mathematics InstituteAlbert-Ludwigs-Universität FreiburgFreiburg im BreisgauGermany

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