The nontrivial zeros of period polynomials of modular forms lie on the unit circle
In this work, the authors derive some relation on nontrivial zeros of period polynomials of modular forms lying on the unit circle, namely they show that all but five of the zeros of the period polynomial associated to a Hecke cusp form are on the unit circle. They collect their results in six lemmas, one theorem and one corollary.
scientific article; zbMATH DE number 6340079