In the first part of this paper we give a survey of classical results on Kummer surfaces with Picard number 17 from the point of view of lattice theory. We prove ampleness properties for certain divisors on Kummer surfaces, and we use them to describe projective models of Kummer surfaces of (1, d)-polarized abelian surfaces for d = 1, 2, 3. As a consequence, we prove that, in these cases, the Neron-Severi group can be generated by lines. In the second part of the paper we use Kummer surfaces to obtain results on K3 surfaces with a symplectic action of the group (Z/2Z)^4. In particular, we describe the possible Neron-Severi groups of the latter in the case that the Picard number is 16, which is the minimal possible. We also describe the N ́eron-Severi groups of the minimal resolution of the quotient surfaces which have 15 nodes. We extend certain classical results on Kummer surfaces to these families.
|Titolo:||Kummer surfaces and K3 surface with (Z/2Z)^4 symplectic action|
|Parole Chiave:||Kummer surfaces, K3 surfaces, automorphisms, Enriques involutions, even sets of nodes.|
|Settore Scientifico Disciplinare:||Settore MAT/03 - Geometria|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||10.1216/RMJ-2016-46-4-1141|
|Appare nelle tipologie:||01 - Articolo su periodico|