Sur une variante des troncatures d'Arthur
  We show that, for a large class of test functions, the unipotent contributions in the trace formula for $GL(n)$ over a number field, can be obtained from zeta functions and integrals of Eisenstein series. The main innovation is a new truncation borrowed from a work of Schiffmann on Higgs bundles. 
Pierre-Henri Chaudouard
math.RT math.NT