abstract: In these two talks I will discuss a Hodge theoretic approach towards the Brauer group of a K3 surface. The first lecture will discuss the basic facts about K3 surfaces (moduli, Torelli theorem and `surjectivity of the period map'), give various examples and introduce the Brauer group. In the second lecture I will discuss the Brauer group of an elliptic fibration.
The talks are an introduction to my eprint Some remarks on Brauer groups of K3 surfaces (http:/it.arxiv.orgabsmath.AG0408006)