### Sur les zeros des fonctions L automorphes, by Emmanuel Kowalski and Philippe Michel

We study, on average over f, zeros of the L-functions of primitive weight
two forms of level q (fixed). We prove, on the one hand, density theorems
for the zeros (similar to the results of Bombieri, Jutila, Motohashi, Selberg
in the case of characters), which are applied in \cite{KM} to obtain a sharp
unconditionnal estimate of the (analytic) rank of the new part of J_0(q);
and, on the other hand, non-vanishing theorems at the critical point, showing
that a positive proportion of L-functions are non zero there.

Emmanuel Kowalski <ekowalsk@math.rutgers.edu>
Philippe Michel <michel@math.u-psud.fr>