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On the discrete spectrum of a boundary value problem

✍ Scribed by V. N. Pivovarchik


Publisher
SP MAIK Nauka/Interperiodica
Year
1991
Tongue
English
Weight
254 KB
Volume
31
Category
Article
ISSN
0037-4466

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The Essential Spectrum of a Non-Elliptic
✍ Heinz Langer; Manfred MΓΆller πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 588 KB

In this note a matrix partial differential operator is considered. It is shown that under certain conditions it defines a closed operator with nonempty resolvent set, and its essential spectrum is determined. In the symmetric case G. D. RAIKOV obtained earlier corresponding results (under slightly d