On the spectrum of a nonlinear planar problem
On the spectrum of a nonlinear planar problem
复制标题
非线性平面问题的谱
DOI:
10.1016/j.anihpc.2007.10.004
复制
发表时间:
2009
影响因子:
1.9
通讯作者:
M. Grossi
中科院分区:
文献类型:
--
作者:
F. Gladiali;M. Grossi
(Ω). The study of the spectrum of F is crucial to calculate the Morse index of the solution uλ. One of the result of this paper will be the computation of the Morse index of the solution uλ in some special cases. Another interesting problem linked to (1.3) is the classical problem of the nodal line of the second eigenfunction. It was proved by A. Melas [19] that if we consider the second eigenfunction of the Laplace operator in a planar convex domains then its nodal line touches the boundary. This result is largely open for eigenfunctions of higher order. In this paper we describe some properties of the nodal line of the eigenfunctions to (1.3). For example we show that, if Ω is convex, the nodal line of the second and third eigenfunction touches the boundary. On the other hand, without any assumption on Ω, we prove that the nodal line of the fourth eigenfunction does not touch the boundary of Ω. Moreover, the asymptotic behavior of these eigenfunctions is described. A crucial tool in the study the eigenvalue problem (1.3) is given by the following “limit” problem,
影响因子:
1.4
作者:
K. Nagasaki;Takashi Suzuki
通讯作者:
K. Nagasaki;Takashi Suzuki