This thesis consists of four parts which investigate different aspects of Hodge classes on self-products of K3 surfaces.<br /> In the first three parts we present three different strategies to tackle the Hodge conjecture ...
This thesis is concerned with the Hodge-theoretic relation between polarized K3 surfaces of degree <em>d</em> and special cubic fourfolds of discriminant <em>d</em>, as introduced by Hassett.<br /> For half of the <em>d</em>, ...