The closure of the set of roots of strongly connected reliability polynomials is the entire complex plane

The strongly connected reliability  scRel(D,p)scRel(D,p) of a digraph DD is the probability that the spanning subgraph of DD consisting of the operational arcs is strongly connected, given that the vertices always operate, but each arc is independently operational with probability p∈[0,1]p∈[0,1]. We show that the closure of the set of roots of strongly connected reliability polynomials is the whole complex plane.