Title: 
Integrality of twisted L-values of elliptic curves

Abstract: 
In the context of the generalised Birch and Swinnerton-Dyer
conjecture, one considers the value at s=1 of the L-function of an
elliptic curve E/\mathbb{Q} twisted by a Dirichlet character \chi. When
normalised with a period, one obtains an algebraic number
\mathscr{L}(E,\chi). In joint work with Hanneke Wiersema, we determine
under what conditions \mathscr{L}(E,\chi) is an algebraic integer.