Orientations, break Divisors and compactified Jacobians

Abstract

The Schinzel–W´ojcik problem consists in determming if Given a1, · · · , ar ∈ Q∗ \ {±1}, there exist infinitely many primes p such that they have the same multiplicative order modulo p. In this thesis, we prove, under the assumption of Hypothesis H of Schinzel, necessary and sufficient conditions for the existence of infinitely many primes modulo which all the given numbers are simultaneously primitive roots and we introduce a possible complete characterization, under Hypothesis H of the r–touples of rational numbers supported at odd primes for which the Schinzel-W´ojcik problem has affimative answer. Consequently, we study the Schinzel–W´ojcik problem on average.