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An elliptic boundary value problem with non-differentiable parameters

✍ Scribed by P. P. N. Groen


Publisher
Springer
Year
1971
Tongue
English
Weight
589 KB
Volume
42
Category
Article
ISSN
0003-9527

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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