Keywords
- Differential Operator
- Elliptic Operator
- Elliptic System
- Operator Coefficient
- Deficiency Index
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References
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Rofe-Beketov, F.S. (1975). Deficiency indices and properties of spectrum of some classes of differential operators. In: Everitt, W.N. (eds) Spectral Theory and Differential Equations. Lecture Notes in Mathematics, vol 448. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0067091
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DOI: https://doi.org/10.1007/BFb0067091
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