Cartesian form of Putnam's inequality for doubly commuting hyponormal \(n\)-tuples (Q2733845)
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scientific article; zbMATH DE number 1633098
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Cartesian form of Putnam's inequality for doubly commuting hyponormal \(n\)-tuples |
scientific article; zbMATH DE number 1633098 |
Statements
12 August 2001
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hyponornal operators
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Putnam's inequality
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joint approximate point spectra
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doubly commuting hyponormal \(n\)-tuples
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Xia spectra
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Taylor and Xia spectra
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Cartesian form of Putnam's inequality for doubly commuting hyponormal \(n\)-tuples (English)
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The authors give some Cartesian form of Putnam's inequality bounded by the area of the joint approximate point spectra for doubly commuting hyponormal \(n\)-tuples by using the inequality bounded by the area of the Xia spectra for semi-hyponormal \(n\)-tuples of operators given by Xia and give also some relation between the Taylor and Xia spectra of such \(n\)-tuples.
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