### Dirichlet motives via modular curves, by Annette Huber and Guido Kings

We construct classes in K-theory for Dirichlet motives and compute
their regulators. In particular, we show that the extensions constructed
by Harder in sheaf theoretic terms are induced by elements in K-theory.
The main ingredient for the constructions is Beilinson's Eisenstein symbol
on modular curves.

Annette Huber <huber@math.uni-muenster.de>

Guido Kings <kings@math.uni-muenster.de>