Abstract:
It is well-known that sums of values of non-principal Dirichlet characters over large enough intervals can be estimated non-trivially. However, it turns out that for any A>0A>0 there exist infinitely many primes p for which there is no non-trivial bound for the sum of values of quadratic character modulo p over the interval of length (logp)A. We will discuss the proof of this result and its possible generalizations.