期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：1998
卷号：21
DOI：10.1155/S0161171298001082
出版社：Hindawi Publishing Corporation
摘要：The object of this paper is to establish an expansion theorem for a regular indefinite
eigenvalue problem of second order differential equation with an eigenvalue parameter,λ in the two
boundary conditions. We associated with this problem a J-selfadjoint operator with compact resolvent
defined in a suitable Krein space and then we develop an associated eigenfunction expansion theorem.
