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Description
Introduction to Spectral Theory in Hilbert SpaceThis text introduces students to Hilbert space and bounded self adjoint operators, as well as the spectrum of an operator and its spectral decomposition. The author, Emeritus Professor of Mathematics at the University of Innsbruck, Austria, has ensured that the treatment is accessible to readers with no further background than a familiarity with analysis and analytic geometry. Starting with a definition of Hilbert space and its geometry, the text
This text introduces students to Hilbert space and bounded self-adjoint operators, as well as the spectrum of an operator and its spectral decomposition. The author, Emeritus Professor of Mathematics at the University of Innsbruck, Austria, has ensured that the treatment is accessible to readers with no further background than a familiarity with analysis and analytic geometry.Starting with a definition of Hilbert space and its geometry, the text explores the general theory of bounded linear operators, the spectral analysis of compact linear operators, and unbounded self-adjoint operators. Extensive appendixes offer supplemental information on the graph of a linear operator and the Riemann-Stieltjes and Lebesgue integration.
Binding Type: Paperback
Publisher: Dover Publications
Published: 06/11/2008
ISBN: 9780486466224
Pages: 346
Weight: 1.01lbs
Size: 9.18h x 6.23w x 0.73d
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4.5 ★★★★★
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★★★★★ 5
Great gift
Color: 7-in-1 Silver, Size: Rechargeable
It’s really easy to use, works amazing, nice speed. It looks awesome on my counter top. Great idea for a gift!!!
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Reviewed in the United States on April 12, 2026
★★★★★ 4
Great value
Color: 6-in-1 Silver, Size: Rechargeable
Great value for the price. Opener works great and holds a charge well.
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Don't pass this one by
Color: Gunmetal Grey, Size: Rechargeable
This is the best wine opener we ever had...push button once...it goes in, pulls cork out, then reverses and drops cork in your hand...all with one push of the button. Long battery life between charges.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Works just like it says.
Color: 8-in-1 Silver, Size: Rechargeable
My hands can no longer open a bottle of wine. This makes it so easy.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Game Changer for Wine Lovers
Color: 8-in-1 Silver, Size: Rechargeable
Circle Joy Electric Wine Bottle Opener and I’m honestly really impressed.
Setup was super simple, and it works exactly as advertised—just place it on the bottle, press a button, and the cork comes out smoothly in seconds. No struggling, no broken corks, and no mess. It makes opening wine feel effortless and a lot more enjoyable.
I also love the sleek design—it looks modern and feels sturdy, not cheap. If you have the set with accessories, the extras like the foil cutter and pourer are a nice bonus and actually useful.
Overall, this is a great little gadget, especially if you open wine often or just want something convenient and easy to use. Definitely a solid buy or even a nice gift idea.
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Reviewed in the United States on April 16, 2026
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