Felipe Román, María Josefa; Grittini, N.; Sotomayor, Víctor(Springer-Verlag, 2020-10)
[EN] Let N be a normal subgroup of a finite group G. In this paper, we consider the elements g of N such that x(g)¿0 for all irreducible characters x of G. Such an element is said to be non-vanishing in G. Let p be a prime. ...