Bifurcations of a class of one-dimensional reaction-diffusion equations of
the form u " + muu - u(k) = 0, where mu is a parameter, 2 less than or equa
l to k is an element of Z(+), with boundary value condition u(0) = u(pi) =
0, are investigated. Using the singularity theory based on the Liapunov-Sch
midt reduction, some characterization results are obtained.