On positive differential operators (deficiency indices, factorization, perturbations) (Q3728697)
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| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On positive differential operators (deficiency indices, factorization, perturbations) |
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On positive differential operators (deficiency indices, factorization, perturbations) (English)
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1984
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perturbations
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stability of discrete spectrum
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resolvent convergence
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densely or non-densely defined elliptic differential operators
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Courant theorem on variations of the domain
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Berezankij's theorem on essential self-adjointness
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finite velocity of propagation
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Krein-Heinz-Rellich factorization theorems
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Etgen-Pawlowski oscillation criterion
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equations of any order with operator-valued coefficients
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