Note on a Geometric Isogeny of K3 Surfaces

This paper establishes a correspondence relating two specific classes of complex algebraic K3 surfaces. The first class consists of K3 surfaces polarized by the rank-16 lattice H ⊕ E7 ⊕ E7. The second class consists of K3 surfaces obtained as minimal resolutions of double covers of the projective plane branched over a configuration of six lines. The correspondence underlies a geometric 2-isogeny of K3 surfaces.