Topics in Arithmetical Algebraic Geometry We will look at some foundational material in arithmetical algebraic geometry, leading to recent developments around the ranks of elliptic curves. Possible topics: basics on elliptic curves complex multiplication and the dream of Kronecker's youth Jacobians and abelian varieties Shimura-Taniyama theory of complex multiplication Heegner points and the BSD conjecture in rank 1 Fancier Heegner points, Iwasawa theory, and ranks in dihedral towers Growth of ranks in non-abelian towers This will be a seminar-style course with active student participation. It should be of interest to students planning to work in number theory or algebraic geometry. Prerequisites: some knowledge of basic algebraic geometry and number theory (together with a willingness to work) should suffice.