**Chandrashekhar Khare**

University of California, Los Angeles, USA

October 4, 2012

**Ray class groups and generalised Jacobians**:
We will extend Iwasawa's analogy between class groups in p-cyclotomic towers and Jacobians of curves to ray class groups in cyclotomic towers and generalised Jacobians, and explain how a well-known conjecture of Leopoldt about p-adic independence of units fits into this context. This is part of a joint work with Wintenberger.