Degeneration of the l-adic Eisenstein symbol and of the elliptic polylog, by Annette Huber, Guido Kings
The main new result is the computation of the degeneration of
l-adic Eisenstein classes at the cusps. This is done by
relating it to the degeneration of the elliptic polylog.
These classes come from K-theory and their Hodge regulator
can also be computed (see: Dirichlet motives
via modula curves, on the K-theory server). This gives a new
proof of a comparison conjecture of Bloch and Kato which was used in the
proof of their Tamagawa number conjecture for the Riemann zeta-function.
The paper contains appendices on the definition of the classical and
elliptic polylog, its degeneration and the comparison to Eisenstein classes.
Annette Huber, Guido Kings <email@example.com, firstname.lastname@example.org>