Invariants of Harish-Chandra Modules

The  distribution  character  is  a  complete  invariant  of  Harish-Chandra modules
(it determines the representation up to infinitesimal equivalence.)  It is very
difficult to compute.  There are other invariants, sometimes weaker, which
contain very important information about the representation. An example is
the associated cycle. In the first part of the talk I will introduce some such
invariants and explain relevant information encoded by them. The second part
of the talk, based on work with R. Zierau, will focus on the computation of
associated cycles for a class of representations.