Bifurcation and symmetry breaking for a class of semilinear elliptic equations in an annulus

In this paper we consider the problem {-Delta = u(p) + lambda u in A, u > 0 in A, u = 0 on partial derivative A, where A is an annulus of R(N), N >= 2 and p > 1. We prove bifurcation of nonradial solutions from the radial solution in correspondence of a sequence of exponents {p(k)} and for expanding annuli