Maximal multiplicity and bifurcation in a CSTR with two consecutive first order reactions

The steady state equation of a continuous stirred tank reactor is considered in the frame work of singularity theory. The maximal multiplicity of seven is obtained. The importance of the bifurcation parameter is studied and a new normal form equivalent to the original function is obtained. This normal form corresponds to the most degenerate singularity and its universal unfolding can predict all the bifurcation diagrams existing for this problem.