Discreteness of the spectrum of first-order normal differential operators (Q1593869)
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scientific article; zbMATH DE number 1557227
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Discreteness of the spectrum of first-order normal differential operators |
scientific article; zbMATH DE number 1557227 |
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Discreteness of the spectrum of first-order normal differential operators (English)
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28 January 2001
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normal extensions of an unbounded formally normal operator
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general theory of differential operators
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linear lower positive definite self-adjoint operator in Hilbert space
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first-order differential-operator
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minimal operator
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