Essential Spectrum

Part of the Operator Theory: Advances and Applications book series (OT, volume 139)


In this chapter we study various types of essential spectra of operators on a Banach space X. They are closely connected with the Calkin algebra \( \mathcal{B}\left( X \right)/\mathcal{K}\left( X \right) \) , where \( \mathcal{K}\left( X \right) \) denotes the ideal of compact operators.


Banach Space Compact Operator Closed Subspace Essential Spectrum Fredholm Operator 
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© Birkhäuser Verlag AG, P.O. Box 133, CH-4010 Basel, Switzerland 2007

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