## Journal of the Mathematical Society of Japan

### Van Geemen-Sarti involutions and elliptic fibrations on $K3$ surfaces double cover of $\mathbb{P}^2$

#### Abstract

In this paper we classify the elliptic fibrations on $K3$ surfaces which are the double cover of a blow up of $\mathbb{P}^2$ branched along rational curves and we give equations for many of these elliptic fibrations. Thus we obtain a classification of the van Geemen-Sarti involutions (which are symplectic involutions induced by a translation by a 2-torsion section on an elliptic fibration) on such a surface. Each van Geemen-Sarti involution induces a 2-isogeny between two $K3$ surfaces, which is described in this paper.

#### Article information

Source
J. Math. Soc. Japan, Volume 66, Number 2 (2014), 479-522.

Dates
First available in Project Euclid: 23 April 2014

https://projecteuclid.org/euclid.jmsj/1398258181

Digital Object Identifier
doi:10.2969/jmsj/06620479

Mathematical Reviews number (MathSciNet)
MR3201823

Zentralblatt MATH identifier
1298.14038

#### Citation

COMPARIN, Paola; GARBAGNATI, Alice. Van Geemen-Sarti involutions and elliptic fibrations on $K3$ surfaces double cover of $\mathbb{P}^2$. J. Math. Soc. Japan 66 (2014), no. 2, 479--522. doi:10.2969/jmsj/06620479. https://projecteuclid.org/euclid.jmsj/1398258181

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