The automorphism group of a K3 surface with Picard number two is either the infinite cyclic group or the infinite dihedral group, if it is infinite. In this paper, we determine some conditions for a K3 surface of Picard number two to have the infinite dihedral automorphism group.
机构:
Hokkaido Univ, Fac Sci, Dept Math, Kita 10,Nishi 8,Kita-ku, Sapporo 0600810, JapanHokkaido Univ, Fac Sci, Dept Math, Kita 10,Nishi 8,Kita-ku, Sapporo 0600810, Japan
机构:
Univ Pisa, Dipartimento Matemat, Largo Bruno Pontecorvo 5, I-56127 Pisa, ItalyUniv Pisa, Dipartimento Matemat, Largo Bruno Pontecorvo 5, I-56127 Pisa, Italy