APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION, cilt.31, sa.2, ss.247-254, 2010 (SCI-Expanded)
In this article, we study a semilinear p-Laplacian Dirichlet problem arising in population dynamics. We obtain the Morse critical groups at zero. The results show that the energy functional of the problem is trivial. As a consequence, the existence and bifurcation of the nontrivial solutions to the problem are established.