Benoit Guerville-Balle

Title: Configuration of points and complexified real arrangements
(in collaboration with J. Viu Sos).

Abstract: In this talk, we present a distinction method of Zariski
pair (in the case of complexifed real arrangements). It is based on a
points counting in the arrangement dual-configuration. As an
illustration, we construct the second known example of complexified
real arrangements Zariski pair. The invariant used to detect it is
strongly related with the characteristic varieties and the 2-cover
branched along a part of the arrangement.