  The paper investigates emergence of pitchfork bifurcations in the chemical
systems. The systems may be split conditionally by two groups, the strong and
the weak, depending upon system complexity and its potential response to the
external impact. This work investigates birth and development of bifurcations
in the systems of both types. As a special case of a weak system with high
degree of the equilibrium transformation, emergence of bifurcations was studied
in the discrete thermodynamic model of 2-level laser.
