2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/19419A systematic theory is introduced that describes stochastic effects in game theory. In a biological context, such effects are relevant for the evolution of finite populations with frequency-dependent selection. They are characterized by quantum Nash equilibria, a generalization of the well-known Nash equilibrium points in classical game theory. The implications of this theory for biological systems are discussed in detail.6 pages, 1 Postscript figureStatistical MechanicsQuantitative Biologytext