Abstract. We introduce and study the essential numerical range for Banach space operators. This generalizes the corresponding well-known concept for Hilbert space operators.
AMS Subject Classification
(1991): 47A12, 46H05
Keyword(s):
essential numerical range,
measure of non-compactness,
Asplund spaces
Received November 5, 2004. (Registered under 5869/2009.)
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