Eigenvalue, bifurcation, existence and nonexistence of solutions for Monge-Ampère equations (1207.6669v1)

Abstract: In this paper we study the following eigenvalue boundary value problem for Monge-Amp`{e}re equations: {equation} {{array}{l} \det(D^2u)=\lambda^N f(-u)\,\, \text{in}\,\, \Omega, u=0,\,\text{on}\,\, \partial \Omega. {array}. {equation} We establish the unilateral global bifurcation results for the problem with $f(u)=u^N+g(u)$ and $\Omega$ being the unit ball of $\mathbb{R}^N$. More precisely, under some natural hypotheses on the perturbation function $g:\mathbb{R}\rightarrow\mathbb{R}$, we show that $(\lambda_1,0)$ is a bifurcation point of the problem and there are two distinct unbounded continua of one-sign solutions, where $\lambda_1$ is the first eigenvalue of the problem with $f(u)=u^N$. As the applications of the above results, we consider with determining interval of $\lambda$, in which there exist solutions for this problem in unit ball. Moreover, we also get some results on the existence and nonexistence of convex solutions for this problem in general domain by domain comparison method.