Browsing by Keywords "Integral lattices"
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(World Scientific Publishing Co. Pte. Ltd., 2008)Reflection walls of certain primitive vectors in the anti-invariant sublattice of the K3 lattice define Heegner divisors in the period space of Enriques surfaces. We show that depending on the norm of these primitive ...
(American Mathematical Society, 2005)We determine the necessary and sufficient conditions on the entries of the intersection matrix of the transcendental lattice of a singular K3 surface for the surface to doubly cover an Enriques surface.