(1) Department of Mathematics, Shanghai Normal University, Shanghai, 200234, China
Abstract:
By making use of bifurcation analysis and continuation method, the authors discuss the exact number of positive solutions
for a class of perturbed equations. The nonlinearities concerned are the so-called convex-concave functions and their behaviors
may be asymptotic sublinear or asymptotic linear. Moreover, precise global bifurcation diagrams are obtained.
Project supported by the Foundation of Shanghai Municipal Education Commission (No. 06DZ004).