Manipulation and Control for Approval Voting and Other Voting Systems 
Joerg Rothe (Duesseldorf)

Manipulation and control are two well-studied ways of influencing
the outcome of elections.  In this talk, the complexity of the
corresponding problems is surveyed for a number of widely used
voting systems, including approval voting, with a particular focus
on the impact of domain restrictions (single-peakedness) of the
given preference profiles.