2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/17906Applying the theory of Yang-Lee zeros to nonequilibrium critical phenomena, we investigate the properties of a directed bond percolation process for a complex percolation parameter p. It is shown that for the Golden Ratio p=(1(+/-)sqrt(5))/2 and for p=2 the survival probability of a cluster can be computed exactly.LaTeX, IOP-style, 6 pages, 4 eps figuresStatistical Mechanicstext