Sturm-Liouville differential operators
Spectral properties of the equation l (f ) - λrf = 0 with an indefinite weight function r are studied in LI2rl . The main tool is the theory of definitizable operators in Krein spaces. Under special assumptions on the weight function, for the operator associated with the problem, the regularity of the critical point infinity is proved. Some relations to full- and half-range expansions are indicated.
Spectral Theory of Sturm-Liouville Differential Operators
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Argonne National Laboratory, Argonne IL
Operated by The University of Chicago for the U.S. Department of Energy under Contract W-31-109-Eng-38
Spectral Properties of Self-Adjoint Ordinary Differential Operators with an Indefinite Weight Function. (with H. Langer) Proceedings of the 1984 Workshop ``Spectral Theory of Sturm-Liouville Differential Operators,'' ANL-84-73, Argonne National Laboratory, Argonne, Ill., (1984) 73-80.